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Merge remote-tracking branch 'origin/upstream/linux-linaro-lsk-v3.10-android+android-common-3.10' into develop-3.10

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黄涛
2013-12-10 12:14:30 +08:00
parent ecf7b0db7b 8315cce6bb
commit 7362dbfb8c
118 changed files with 1678 additions and 537 deletions
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136
Documentation/arm/small_task_packing.txt Normal file
View File

@@ -0,0 +1,136 @@
Small Task Packing in the big.LITTLE MP Reference Patch Set
What is small task packing?
----
Simply that the scheduler will fit as many small tasks on a single CPU
as possible before using other CPUs. A small task is defined as one
whose tracked load is less than 90% of a NICE_0 task. This is a change
from the usual behavior since the scheduler will normally use an idle
CPU for a waking task unless that task is considered cache hot.
How is it implemented?
----
Since all small tasks must wake up relatively frequently, the main
requirement for packing small tasks is to select a partly-busy CPU when
waking rather than looking for an idle CPU. We use the tracked load of
the CPU runqueue to determine how heavily loaded each CPU is and the
tracked load of the task to determine if it will fit on the CPU. We
always start with the lowest-numbered CPU in a sched domain and stop
looking when we find a CPU with enough space for the task.
Some further tweaks are necessary to suppress load balancing when the
CPU is not fully loaded, otherwise the scheduler attempts to spread
tasks evenly across the domain.
How does it interact with the HMP patches?
----
Firstly, we only enable packing on the little domain. The intent is that
the big domain is intended to spread tasks amongst the available CPUs
one-task-per-CPU. The little domain however is attempting to use as
little power as possible while servicing its tasks.
Secondly, since we offload big tasks onto little CPUs in order to try
to devote one CPU to each task, we have a threshold above which we do
not try to pack a task and instead will select an idle CPU if possible.
This maintains maximum forward progress for busy tasks temporarily
demoted from big CPUs.
Can the behaviour be tuned?
----
Yes, the load level of a 'full' CPU can be easily modified in the source
and is exposed through sysfs as /sys/kernel/hmp/packing_limit to be
changed at runtime. The presence of the packing behaviour is controlled
by CONFIG_SCHED_HMP_LITTLE_PACKING and can be disabled at run-time
using /sys/kernel/hmp/packing_enable.
The definition of a small task is hard coded as 90% of NICE_0_LOAD
and cannot be modified at run time.
Why do I need to tune it?
----
The optimal configuration is likely to be different depending upon the
design and manufacturing of your SoC.
In the main, there are two system effects from enabling small task
packing.
1. CPU operating point may increase
2. wakeup latency of tasks may be increased
There are also likely to be secondary effects from loading one CPU
rather than spreading tasks.
Note that all of these system effects are dependent upon the workload
under consideration.
CPU Operating Point
----
The primary impact of loading one CPU with a number of light tasks is to
increase the compute requirement of that CPU since it is no longer idle
as often. Increased compute requirement causes an increase in the
frequency of the CPU through CPUfreq.
Consider this example:
We have a system with 3 CPUs which can operate at any frequency between
350MHz and 1GHz. The system has 6 tasks which would each produce 10%
load at 1GHz. The scheduler has frequency-invariant load scaling
enabled. Our DVFS governor aims for 80% utilization at the chosen
frequency.
Without task packing, these tasks will be spread out amongst all CPUs
such that each has 2. This will produce roughly 20% system load, and
the frequency of the package will remain at 350MHz.
With task packing set to the default packing_limit, all of these tasks
will sit on one CPU and require a package frequency of ~750MHz to reach
80% utilization. (0.75 = 0.6 * 0.8).
When a package operates on a single frequency domain, all CPUs in that
package share frequency and voltage.
Depending upon the SoC implementation there can be a significant amount
of energy lost to leakage from idle CPUs. The decision about how
loaded a CPU must be to be considered 'full' is therefore controllable
through sysfs (sys/kernel/hmp/packing_limit) and directly in the code.
Continuing the example, lets set packing_limit to 450 which means we
will pack tasks until the total load of all running tasks >= 450. In
practise, this is very similar to a 55% idle 1Ghz CPU.
Now we are only able to place 4 tasks on CPU0, and two will overflow
onto CPU1. CPU0 will have a load of 40% and CPU1 will have a load of
20%. In order to still hit 80% utilization, CPU0 now only needs to
operate at (0.4*0.8=0.32) 320MHz, which means that the lowest operating
point will be selected, the same as in the non-packing case, except that
now CPU2 is no longer needed and can be power-gated.
In order to use less energy, the saving from power-gating CPU2 must be
more than the energy spent running CPU0 for the extra cycles. This
depends upon the SoC implementation.
This is obviously a contrived example requiring all the tasks to
be runnable at the same time, but it illustrates the point.
Wakeup Latency
----
This is an unavoidable consequence of trying to pack tasks together
rather than giving them a CPU each. If you cannot find an acceptable
level of wakeup latency, you should turn packing off.
Cyclictest is a good test application for determining the added latency
when configuring packing.
Why is it turned off for the VersatileExpress V2P_CA15A7 CoreTile?
----
Simply, this core tile only has power gating for the whole A7 package.
When small task packing is enabled, all our low-energy use cases
normally fit onto one A7 CPU. We therefore end up with 2 mostly-idle
CPUs and one mostly-busy CPU. This decreases the amount of time
available where the whole package is idle and can be turned off.

2
Makefile
View File

@@ -1,6 +1,6 @@
VERSION = 3
PATCHLEVEL = 10
SUBLEVEL = 19
SUBLEVEL = 21
EXTRAVERSION =
NAME = TOSSUG Baby Fish

31
arch/arm/Kconfig
View File

@@ -1513,6 +1513,17 @@ config SCHED_HMP
There is currently no support for migration of task groups, hence
!SCHED_AUTOGROUP. Furthermore, normal load-balancing must be disabled
between cpus of different type (DISABLE_CPU_SCHED_DOMAIN_BALANCE).
When turned on, this option adds sys/kernel/hmp directory which
contains the following files:
up_threshold - the load average threshold used for up migration
(0 - 1023)
down_threshold - the load average threshold used for down migration
(0 - 1023)
hmp_domains - a list of cpumasks for the present HMP domains,
starting with the 'biggest' and ending with the
'smallest'.
Note that both the threshold files can be written at runtime to
control scheduler behaviour.
config SCHED_HMP_PRIO_FILTER
bool "(EXPERIMENTAL) Filter HMP migrations by task priority"
@@ -1547,28 +1558,24 @@ config HMP_VARIABLE_SCALE
bool "Allows changing the load tracking scale through sysfs"
depends on SCHED_HMP
help
When turned on, this option exports the thresholds and load average
period value for the load tracking patches through sysfs.
When turned on, this option exports the load average period value
for the load tracking patches through sysfs.
The values can be modified to change the rate of load accumulation
and the thresholds used for HMP migration.
The load_avg_period_ms is the time in ms to reach a load average of
0.5 for an idle task of 0 load average ratio that start a busy loop.
The up_threshold and down_threshold is the value to go to a faster
CPU or to go back to a slower cpu.
The {up,down}_threshold are devided by 1024 before being compared
to the load average.
For examples, with load_avg_period_ms = 128 and up_threshold = 512,
used for HMP migration. 'load_avg_period_ms' is the time in ms to
reach a load average of 0.5 for an idle task of 0 load average
ratio which becomes 100% busy.
For example, with load_avg_period_ms = 128 and up_threshold = 512,
a running task with a load of 0 will be migrated to a bigger CPU after
128ms, because after 128ms its load_avg_ratio is 0.5 and the real
up_threshold is 0.5.
This patch has the same behavior as changing the Y of the load
average computation to
(1002/1024)^(LOAD_AVG_PERIOD/load_avg_period_ms)
but it remove intermadiate overflows in computation.
but removes intermediate overflows in computation.
config HMP_FREQUENCY_INVARIANT_SCALE
bool "(EXPERIMENTAL) Frequency-Invariant Tracked Load for HMP"
depends on HMP_VARIABLE_SCALE && CPU_FREQ
depends on SCHED_HMP && CPU_FREQ
help
Scales the current load contribution in line with the frequency
of the CPU that the task was executed on.

34
arch/arm/kvm/mmu.c
View File

@@ -313,6 +313,17 @@ out:
return err;
}
static phys_addr_t kvm_kaddr_to_phys(void *kaddr)
{
if (!is_vmalloc_addr(kaddr)) {
BUG_ON(!virt_addr_valid(kaddr));
return __pa(kaddr);
} else {
return page_to_phys(vmalloc_to_page(kaddr)) +
offset_in_page(kaddr);
}
}
/**
* create_hyp_mappings - duplicate a kernel virtual address range in Hyp mode
* @from: The virtual kernel start address of the range
@@ -324,16 +335,27 @@ out:
*/
int create_hyp_mappings(void *from, void *to)
{
unsigned long phys_addr = virt_to_phys(from);
phys_addr_t phys_addr;
unsigned long virt_addr;
unsigned long start = KERN_TO_HYP((unsigned long)from);
unsigned long end = KERN_TO_HYP((unsigned long)to);
/* Check for a valid kernel memory mapping */
if (!virt_addr_valid(from) || !virt_addr_valid(to - 1))
return -EINVAL;
start = start & PAGE_MASK;
end = PAGE_ALIGN(end);
return __create_hyp_mappings(hyp_pgd, start, end,
__phys_to_pfn(phys_addr), PAGE_HYP);
for (virt_addr = start; virt_addr < end; virt_addr += PAGE_SIZE) {
int err;
phys_addr = kvm_kaddr_to_phys(from + virt_addr - start);
err = __create_hyp_mappings(hyp_pgd, virt_addr,
virt_addr + PAGE_SIZE,
__phys_to_pfn(phys_addr),
PAGE_HYP);
if (err)
return err;
}
return 0;
}
/**

10
arch/arm/mach-vexpress/tc2_pm.c
View File

@@ -122,7 +122,15 @@ static void tc2_pm_down(u64 residency)
} else
BUG();
gic_cpu_if_down();
/*
* If the CPU is committed to power down, make sure
* the power controller will be in charge of waking it
* up upon IRQ, ie IRQ lines are cut from GIC CPU IF
* to the CPU by disabling the GIC CPU IF to prevent wfi
* from completing execution behind power controller back
*/
if (!skip_wfi)
gic_cpu_if_down();
if (last_man && __mcpm_outbound_enter_critical(cpu, cluster)) {
arch_spin_unlock(&tc2_pm_lock);

1
arch/cris/include/asm/io.h
View File

@@ -3,6 +3,7 @@
#include <asm/page.h> /* for __va, __pa */
#include <arch/io.h>
#include <asm-generic/iomap.h>
#include <linux/kernel.h>
struct cris_io_operations

2
arch/ia64/include/asm/processor.h
View File

@@ -319,7 +319,7 @@ struct thread_struct {
regs->loadrs = 0; \
regs->r8 = get_dumpable(current->mm); /* set "don't zap registers" flag */ \
regs->r12 = new_sp - 16; /* allocate 16 byte scratch area */ \
if (unlikely(!get_dumpable(current->mm))) { \
if (unlikely(get_dumpable(current->mm) != SUID_DUMP_USER)) { \
/* \
* Zap scratch regs to avoid leaking bits between processes with different \
* uid/privileges. \

10
arch/powerpc/kernel/signal_32.c
View File

@@ -454,7 +454,15 @@ static int save_user_regs(struct pt_regs *regs, struct mcontext __user *frame,
if (copy_vsx_to_user(&frame->mc_vsregs, current))
return 1;
msr |= MSR_VSX;
}
} else if (!ctx_has_vsx_region)
/*
* With a small context structure we can't hold the VSX
* registers, hence clear the MSR value to indicate the state
* was not saved.
*/
msr &= ~MSR_VSX;
#endif /* CONFIG_VSX */
#ifdef CONFIG_SPE
/* save spe registers */

4
arch/powerpc/kernel/vio.c
View File

@@ -1530,12 +1530,12 @@ static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
dn = dev->of_node;
if (!dn) {
strcat(buf, "\n");
strcpy(buf, "\n");
return strlen(buf);
}
cp = of_get_property(dn, "compatible", NULL);
if (!cp) {
strcat(buf, "\n");
strcpy(buf, "\n");
return strlen(buf);
}

2
arch/powerpc/mm/slice.c
View File

@@ -258,7 +258,7 @@ static bool slice_scan_available(unsigned long addr,
slice = GET_HIGH_SLICE_INDEX(addr);
*boundary_addr = (slice + end) ?
((slice + end) << SLICE_HIGH_SHIFT) : SLICE_LOW_TOP;
return !!(available.high_slices & (1u << slice));
return !!(available.high_slices & (1ul << slice));
}
}

2
arch/powerpc/platforms/52xx/Kconfig
View File

@@ -57,5 +57,5 @@ config PPC_MPC5200_BUGFIX
config PPC_MPC5200_LPBFIFO
tristate "MPC5200 LocalPlus bus FIFO driver"
depends on PPC_MPC52xx
depends on PPC_MPC52xx && PPC_BESTCOMM
select PPC_BESTCOMM_GEN_BD

12
arch/powerpc/platforms/powernv/pci-ioda.c
View File

@@ -151,13 +151,23 @@ static int pnv_ioda_configure_pe(struct pnv_phb *phb, struct pnv_ioda_pe *pe)
rid_end = pe->rid + 1;
}
/* Associate PE in PELT */
/*
* Associate PE in PELT. We need add the PE into the
* corresponding PELT-V as well. Otherwise, the error
* originated from the PE might contribute to other
* PEs.
*/
rc = opal_pci_set_pe(phb->opal_id, pe->pe_number, pe->rid,
bcomp, dcomp, fcomp, OPAL_MAP_PE);
if (rc) {
pe_err(pe, "OPAL error %ld trying to setup PELT table\n", rc);
return -ENXIO;
}
rc = opal_pci_set_peltv(phb->opal_id, pe->pe_number,
pe->pe_number, OPAL_ADD_PE_TO_DOMAIN);
if (rc)
pe_warn(pe, "OPAL error %d adding self to PELTV\n", rc);
opal_pci_eeh_freeze_clear(phb->opal_id, pe->pe_number,
OPAL_EEH_ACTION_CLEAR_FREEZE_ALL);

19
arch/s390/crypto/aes_s390.c
View File

@@ -35,7 +35,6 @@ static u8 *ctrblk;
static char keylen_flag;
struct s390_aes_ctx {
u8 iv[AES_BLOCK_SIZE];
u8 key[AES_MAX_KEY_SIZE];
long enc;
long dec;
@@ -441,30 +440,36 @@ static int cbc_aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
return aes_set_key(tfm, in_key, key_len);
}
static int cbc_aes_crypt(struct blkcipher_desc *desc, long func, void *param,
static int cbc_aes_crypt(struct blkcipher_desc *desc, long func,
struct blkcipher_walk *walk)
{
struct s390_aes_ctx *sctx = crypto_blkcipher_ctx(desc->tfm);
int ret = blkcipher_walk_virt(desc, walk);
unsigned int nbytes = walk->nbytes;
struct {
u8 iv[AES_BLOCK_SIZE];
u8 key[AES_MAX_KEY_SIZE];
} param;
if (!nbytes)
goto out;
memcpy(param, walk->iv, AES_BLOCK_SIZE);
memcpy(param.iv, walk->iv, AES_BLOCK_SIZE);
memcpy(param.key, sctx->key, sctx->key_len);
do {
/* only use complete blocks */
unsigned int n = nbytes & ~(AES_BLOCK_SIZE - 1);
u8 *out = walk->dst.virt.addr;
u8 *in = walk->src.virt.addr;
ret = crypt_s390_kmc(func, param, out, in, n);
ret = crypt_s390_kmc(func, &param, out, in, n);
if (ret < 0 || ret != n)
return -EIO;
nbytes &= AES_BLOCK_SIZE - 1;
ret = blkcipher_walk_done(desc, walk, nbytes);
} while ((nbytes = walk->nbytes));
memcpy(walk->iv, param, AES_BLOCK_SIZE);
memcpy(walk->iv, param.iv, AES_BLOCK_SIZE);
out:
return ret;
@@ -481,7 +486,7 @@ static int cbc_aes_encrypt(struct blkcipher_desc *desc,
return fallback_blk_enc(desc, dst, src, nbytes);
blkcipher_walk_init(&walk, dst, src, nbytes);
return cbc_aes_crypt(desc, sctx->enc, sctx->iv, &walk);
return cbc_aes_crypt(desc, sctx->enc, &walk);
}
static int cbc_aes_decrypt(struct blkcipher_desc *desc,
@@ -495,7 +500,7 @@ static int cbc_aes_decrypt(struct blkcipher_desc *desc,
return fallback_blk_dec(desc, dst, src, nbytes);
blkcipher_walk_init(&walk, dst, src, nbytes);
return cbc_aes_crypt(desc, sctx->dec, sctx->iv, &walk);
return cbc_aes_crypt(desc, sctx->dec, &walk);
}
static struct crypto_alg cbc_aes_alg = {

4
arch/s390/kernel/smp.c
View File

@@ -933,7 +933,7 @@ static ssize_t show_idle_count(struct device *dev,
idle_count = ACCESS_ONCE(idle->idle_count);
if (ACCESS_ONCE(idle->clock_idle_enter))
idle_count++;
} while ((sequence & 1) || (idle->sequence != sequence));
} while ((sequence & 1) || (ACCESS_ONCE(idle->sequence) != sequence));
return sprintf(buf, "%llu\n", idle_count);
}
static DEVICE_ATTR(idle_count, 0444, show_idle_count, NULL);
@@ -951,7 +951,7 @@ static ssize_t show_idle_time(struct device *dev,
idle_time = ACCESS_ONCE(idle->idle_time);
idle_enter = ACCESS_ONCE(idle->clock_idle_enter);
idle_exit = ACCESS_ONCE(idle->clock_idle_exit);
} while ((sequence & 1) || (idle->sequence != sequence));
} while ((sequence & 1) || (ACCESS_ONCE(idle->sequence) != sequence));
idle_time += idle_enter ? ((idle_exit ? : now) - idle_enter) : 0;
return sprintf(buf, "%llu\n", idle_time >> 12);
}

2
arch/s390/kernel/vtime.c
View File

@@ -190,7 +190,7 @@ cputime64_t s390_get_idle_time(int cpu)
sequence = ACCESS_ONCE(idle->sequence);
idle_enter = ACCESS_ONCE(idle->clock_idle_enter);
idle_exit = ACCESS_ONCE(idle->clock_idle_exit);
} while ((sequence & 1) || (idle->sequence != sequence));
} while ((sequence & 1) || (ACCESS_ONCE(idle->sequence) != sequence));
return idle_enter ? ((idle_exit ?: now) - idle_enter) : 0;
}

14
arch/x86/kernel/ftrace.c
View File

@@ -248,6 +248,15 @@ int ftrace_update_ftrace_func(ftrace_func_t func)
return ret;
}
static int is_ftrace_caller(unsigned long ip)
{
if (ip == (unsigned long)(&ftrace_call) ||
ip == (unsigned long)(&ftrace_regs_call))
return 1;
return 0;
}
/*
* A breakpoint was added to the code address we are about to
* modify, and this is the handle that will just skip over it.
@@ -257,10 +266,13 @@ int ftrace_update_ftrace_func(ftrace_func_t func)
*/
int ftrace_int3_handler(struct pt_regs *regs)
{
unsigned long ip;
if (WARN_ON_ONCE(!regs))
return 0;
if (!ftrace_location(regs->ip - 1))
ip = regs->ip - 1;
if (!ftrace_location(ip) && !is_ftrace_caller(ip))
return 0;
regs->ip += MCOUNT_INSN_SIZE - 1;

2
arch/x86/kernel/microcode_amd.c
View File

@@ -430,7 +430,7 @@ static enum ucode_state request_microcode_amd(int cpu, struct device *device,
snprintf(fw_name, sizeof(fw_name), "amd-ucode/microcode_amd_fam%.2xh.bin", c->x86);
if (request_firmware(&fw, (const char *)fw_name, device)) {
pr_err("failed to load file %s\n", fw_name);
pr_debug("failed to load file %s\n", fw_name);
goto out;
}

6
arch/x86/kernel/process.c
View File

@@ -378,9 +378,9 @@ static void amd_e400_idle(void)
* The switch back from broadcast mode needs to be
* called with interrupts disabled.
*/
local_irq_disable();
clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_EXIT, &cpu);
local_irq_enable();
local_irq_disable();
clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_EXIT, &cpu);
local_irq_enable();
} else
default_idle();
}

5
arch/x86/kvm/emulate.c
View File

@@ -4207,7 +4207,10 @@ static int decode_operand(struct x86_emulate_ctxt *ctxt, struct operand *op,
case OpMem8:
ctxt->memop.bytes = 1;
if (ctxt->memop.type == OP_REG) {
ctxt->memop.addr.reg = decode_register(ctxt, ctxt->modrm_rm, 1);
int highbyte_regs = ctxt->rex_prefix == 0;
ctxt->memop.addr.reg = decode_register(ctxt, ctxt->modrm_rm,
highbyte_regs);
fetch_register_operand(&ctxt->memop);
}
goto mem_common;

1
block/blk-core.c
View File

@@ -2229,6 +2229,7 @@ void blk_start_request(struct request *req)
if (unlikely(blk_bidi_rq(req)))
req->next_rq->resid_len = blk_rq_bytes(req->next_rq);
BUG_ON(test_bit(REQ_ATOM_COMPLETE, &req->atomic_flags));
blk_add_timer(req);
}
EXPORT_SYMBOL(blk_start_request);

1
block/blk-settings.c
View File

@@ -144,6 +144,7 @@ void blk_set_stacking_limits(struct queue_limits *lim)
lim->discard_zeroes_data = 1;
lim->max_segments = USHRT_MAX;
lim->max_hw_sectors = UINT_MAX;
lim->max_segment_size = UINT_MAX;
lim->max_sectors = UINT_MAX;
lim->max_write_same_sectors = UINT_MAX;
}

3
block/blk-timeout.c
View File

@@ -90,8 +90,8 @@ static void blk_rq_timed_out(struct request *req)
__blk_complete_request(req);
break;
case BLK_EH_RESET_TIMER:
blk_clear_rq_complete(req);
blk_add_timer(req);
blk_clear_rq_complete(req);
break;
case BLK_EH_NOT_HANDLED:
/*
@@ -173,7 +173,6 @@ void blk_add_timer(struct request *req)
return;
BUG_ON(!list_empty(&req->timeout_list));
BUG_ON(test_bit(REQ_ATOM_COMPLETE, &req->atomic_flags));
/*
* Some LLDs, like scsi, peek at the timeout to prevent a

4
crypto/ansi_cprng.c
View File

@@ -230,11 +230,11 @@ remainder:
*/
if (byte_count < DEFAULT_BLK_SZ) {
empty_rbuf:
for (; ctx->rand_data_valid < DEFAULT_BLK_SZ;
ctx->rand_data_valid++) {
while (ctx->rand_data_valid < DEFAULT_BLK_SZ) {
*ptr = ctx->rand_data[ctx->rand_data_valid];
ptr++;
byte_count--;
ctx->rand_data_valid++;
if (byte_count == 0)
goto done;
}

50
drivers/acpi/acpica/exoparg1.c
View File

@@ -963,10 +963,17 @@ acpi_status acpi_ex_opcode_1A_0T_1R(struct acpi_walk_state *walk_state)
*/
return_desc =
*(operand[0]->reference.where);
if (return_desc) {
acpi_ut_add_reference
(return_desc);
if (!return_desc) {
/*
* Element is NULL, do not allow the dereference.
* This provides compatibility with other ACPI
* implementations.
*/
return_ACPI_STATUS
(AE_AML_UNINITIALIZED_ELEMENT);
}
acpi_ut_add_reference(return_desc);
break;
default:
@@ -991,11 +998,40 @@ acpi_status acpi_ex_opcode_1A_0T_1R(struct acpi_walk_state *walk_state)
acpi_namespace_node
*)
return_desc);
if (!return_desc) {
break;
}
/*
* June 2013:
* buffer_fields/field_units require additional resolution
*/
switch (return_desc->common.type) {
case ACPI_TYPE_BUFFER_FIELD:
case ACPI_TYPE_LOCAL_REGION_FIELD:
case ACPI_TYPE_LOCAL_BANK_FIELD:
case ACPI_TYPE_LOCAL_INDEX_FIELD:
status =
acpi_ex_read_data_from_field
(walk_state, return_desc,
&temp_desc);
if (ACPI_FAILURE(status)) {
goto cleanup;
}
return_desc = temp_desc;
break;
default:
/* Add another reference to the object */
acpi_ut_add_reference
(return_desc);
break;
}
}
/* Add another reference to the object! */
acpi_ut_add_reference(return_desc);
break;
default:

166
drivers/acpi/acpica/exstore.c
View File

@@ -57,6 +57,11 @@ acpi_ex_store_object_to_index(union acpi_operand_object *val_desc,
union acpi_operand_object *dest_desc,
struct acpi_walk_state *walk_state);
static acpi_status
acpi_ex_store_direct_to_node(union acpi_operand_object *source_desc,
struct acpi_namespace_node *node,
struct acpi_walk_state *walk_state);
/*******************************************************************************
*
* FUNCTION: acpi_ex_store
@@ -376,7 +381,11 @@ acpi_ex_store_object_to_index(union acpi_operand_object *source_desc,
* When storing into an object the data is converted to the
* target object type then stored in the object. This means
* that the target object type (for an initialized target) will
* not be changed by a store operation.
* not be changed by a store operation. A copy_object can change
* the target type, however.
*
* The implicit_conversion flag is set to NO/FALSE only when
* storing to an arg_x -- as per the rules of the ACPI spec.
*
* Assumes parameters are already validated.
*
@@ -400,7 +409,7 @@ acpi_ex_store_object_to_node(union acpi_operand_object *source_desc,
target_type = acpi_ns_get_type(node);
target_desc = acpi_ns_get_attached_object(node);
ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Storing %p(%s) into node %p(%s)\n",
ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Storing %p (%s) to node %p (%s)\n",
source_desc,
acpi_ut_get_object_type_name(source_desc), node,
acpi_ut_get_type_name(target_type)));
@@ -414,46 +423,31 @@ acpi_ex_store_object_to_node(union acpi_operand_object *source_desc,
return_ACPI_STATUS(status);
}
/* If no implicit conversion, drop into the default case below */
if ((!implicit_conversion) ||
((walk_state->opcode == AML_COPY_OP) &&
(target_type != ACPI_TYPE_LOCAL_REGION_FIELD) &&
(target_type != ACPI_TYPE_LOCAL_BANK_FIELD) &&
(target_type != ACPI_TYPE_LOCAL_INDEX_FIELD))) {
/*
* Force execution of default (no implicit conversion). Note:
* copy_object does not perform an implicit conversion, as per the ACPI
* spec -- except in case of region/bank/index fields -- because these
* objects must retain their original type permanently.
*/
target_type = ACPI_TYPE_ANY;
}
/* Do the actual store operation */
switch (target_type) {
case ACPI_TYPE_BUFFER_FIELD:
case ACPI_TYPE_LOCAL_REGION_FIELD:
case ACPI_TYPE_LOCAL_BANK_FIELD:
case ACPI_TYPE_LOCAL_INDEX_FIELD:
/* For fields, copy the source data to the target field. */
status = acpi_ex_write_data_to_field(source_desc, target_desc,
&walk_state->result_obj);
break;
case ACPI_TYPE_INTEGER:
case ACPI_TYPE_STRING:
case ACPI_TYPE_BUFFER:
/*
* These target types are all of type Integer/String/Buffer, and
* therefore support implicit conversion before the store.
*
* Copy and/or convert the source object to a new target object
* The simple data types all support implicit source operand
* conversion before the store.
*/
if ((walk_state->opcode == AML_COPY_OP) || !implicit_conversion) {
/*
* However, copy_object and Stores to arg_x do not perform
* an implicit conversion, as per the ACPI specification.
* A direct store is performed instead.
*/
status = acpi_ex_store_direct_to_node(source_desc, node,
walk_state);
break;
}
/* Store with implicit source operand conversion support */
status =
acpi_ex_store_object_to_object(source_desc, target_desc,
&new_desc, walk_state);
@@ -467,13 +461,12 @@ acpi_ex_store_object_to_node(union acpi_operand_object *source_desc,
* the Name's type to that of the value being stored in it.
* source_desc reference count is incremented by attach_object.
*
* Note: This may change the type of the node if an explicit store
* has been performed such that the node/object type has been
* changed.
* Note: This may change the type of the node if an explicit
* store has been performed such that the node/object type
* has been changed.
*/
status =
acpi_ns_attach_object(node, new_desc,
new_desc->common.type);
status = acpi_ns_attach_object(node, new_desc,
new_desc->common.type);
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"Store %s into %s via Convert/Attach\n",
@@ -484,38 +477,83 @@ acpi_ex_store_object_to_node(union acpi_operand_object *source_desc,
}
break;
case ACPI_TYPE_BUFFER_FIELD:
case ACPI_TYPE_LOCAL_REGION_FIELD:
case ACPI_TYPE_LOCAL_BANK_FIELD:
case ACPI_TYPE_LOCAL_INDEX_FIELD:
/*
* For all fields, always write the source data to the target
* field. Any required implicit source operand conversion is
* performed in the function below as necessary. Note, field
* objects must retain their original type permanently.
*/
status = acpi_ex_write_data_to_field(source_desc, target_desc,
&walk_state->result_obj);
break;
default:
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"Storing [%s] (%p) directly into node [%s] (%p)"
" with no implicit conversion\n",
acpi_ut_get_object_type_name(source_desc),
source_desc,
acpi_ut_get_object_type_name(target_desc),
node));
/*
* No conversions for all other types. Directly store a copy of
* the source object. NOTE: This is a departure from the ACPI
* spec, which states "If conversion is impossible, abort the
* running control method".
* the source object. This is the ACPI spec-defined behavior for
* the copy_object operator.
*
* This code implements "If conversion is impossible, treat the
* Store operation as a CopyObject".
* NOTE: For the Store operator, this is a departure from the
* ACPI spec, which states "If conversion is impossible, abort
* the running control method". Instead, this code implements
* "If conversion is impossible, treat the Store operation as
* a CopyObject".
*/
status =
acpi_ut_copy_iobject_to_iobject(source_desc, &new_desc,
walk_state);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
status =
acpi_ns_attach_object(node, new_desc,
new_desc->common.type);
acpi_ut_remove_reference(new_desc);
status = acpi_ex_store_direct_to_node(source_desc, node,
walk_state);
break;
}
return_ACPI_STATUS(status);
}
/*******************************************************************************
*
* FUNCTION: acpi_ex_store_direct_to_node
*
* PARAMETERS: source_desc - Value to be stored
* node - Named object to receive the value
* walk_state - Current walk state
*
* RETURN: Status
*
* DESCRIPTION: "Store" an object directly to a node. This involves a copy
* and an attach.
*
******************************************************************************/
static acpi_status
acpi_ex_store_direct_to_node(union acpi_operand_object *source_desc,
struct acpi_namespace_node *node,
struct acpi_walk_state *walk_state)
{
acpi_status status;
union acpi_operand_object *new_desc;
ACPI_FUNCTION_TRACE(ex_store_direct_to_node);
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"Storing [%s] (%p) directly into node [%s] (%p)"
" with no implicit conversion\n",
acpi_ut_get_object_type_name(source_desc),
source_desc, acpi_ut_get_type_name(node->type),
node));
/* Copy the source object to a new object */
status =
acpi_ut_copy_iobject_to_iobject(source_desc, &new_desc, walk_state);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/* Attach the new object to the node */
status = acpi_ns_attach_object(node, new_desc, new_desc->common.type);
acpi_ut_remove_reference(new_desc);
return_ACPI_STATUS(status);
}

3
drivers/acpi/ec.c
View File

@@ -175,9 +175,10 @@ static void start_transaction(struct acpi_ec *ec)
static void advance_transaction(struct acpi_ec *ec, u8 status)
{
unsigned long flags;
struct transaction *t = ec->curr;
struct transaction *t;
spin_lock_irqsave(&ec->lock, flags);
t = ec->curr;
if (!t)
goto unlock;
if (t->wlen > t->wi) {

5
drivers/acpi/pci_root.c
View File

@@ -614,9 +614,12 @@ static void handle_root_bridge_removal(struct acpi_device *device)
ej_event->device = device;
ej_event->event = ACPI_NOTIFY_EJECT_REQUEST;
get_device(&device->dev);
status = acpi_os_hotplug_execute(acpi_bus_hot_remove_device, ej_event);
if (ACPI_FAILURE(status))
if (ACPI_FAILURE(status)) {
put_device(&device->dev);
kfree(ej_event);
}
}
static void _handle_hotplug_event_root(struct work_struct *work)

46
drivers/acpi/processor_idle.c
View File

@@ -121,17 +121,10 @@ static struct dmi_system_id __cpuinitdata processor_power_dmi_table[] = {
*/
static void acpi_safe_halt(void)
{
current_thread_info()->status &= ~TS_POLLING;
/*
* TS_POLLING-cleared state must be visible before we
* test NEED_RESCHED:
*/
smp_mb();
if (!need_resched()) {
if (!tif_need_resched()) {
safe_halt();
local_irq_disable();
}
current_thread_info()->status |= TS_POLLING;
}
#ifdef ARCH_APICTIMER_STOPS_ON_C3
@@ -739,6 +732,11 @@ static int acpi_idle_enter_c1(struct cpuidle_device *dev,
if (unlikely(!pr))
return -EINVAL;
if (cx->entry_method == ACPI_CSTATE_FFH) {
if (current_set_polling_and_test())
return -EINVAL;
}
lapic_timer_state_broadcast(pr, cx, 1);
acpi_idle_do_entry(cx);
@@ -792,18 +790,9 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev,
if (unlikely(!pr))
return -EINVAL;
if (cx->entry_method != ACPI_CSTATE_FFH) {
current_thread_info()->status &= ~TS_POLLING;
/*
* TS_POLLING-cleared state must be visible before we test
* NEED_RESCHED:
*/
smp_mb();
if (unlikely(need_resched())) {
current_thread_info()->status |= TS_POLLING;
if (cx->entry_method == ACPI_CSTATE_FFH) {
if (current_set_polling_and_test())
return -EINVAL;
}
}
/*
@@ -821,9 +810,6 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev,
sched_clock_idle_wakeup_event(0);
if (cx->entry_method != ACPI_CSTATE_FFH)
current_thread_info()->status |= TS_POLLING;
lapic_timer_state_broadcast(pr, cx, 0);
return index;
}
@@ -860,18 +846,9 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
}
}
if (cx->entry_method != ACPI_CSTATE_FFH) {
current_thread_info()->status &= ~TS_POLLING;
/*
* TS_POLLING-cleared state must be visible before we test
* NEED_RESCHED:
*/
smp_mb();
if (unlikely(need_resched())) {
current_thread_info()->status |= TS_POLLING;
if (cx->entry_method == ACPI_CSTATE_FFH) {
if (current_set_polling_and_test())
return -EINVAL;
}
}
acpi_unlazy_tlb(smp_processor_id());
@@ -917,9 +894,6 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
sched_clock_idle_wakeup_event(0);
if (cx->entry_method != ACPI_CSTATE_FFH)
current_thread_info()->status |= TS_POLLING;
lapic_timer_state_broadcast(pr, cx, 0);
return index;
}

2
drivers/acpi/scan.c
View File

@@ -244,8 +244,6 @@ static void acpi_scan_bus_device_check(acpi_handle handle, u32 ost_source)
goto out;
}
}
acpi_evaluate_hotplug_ost(handle, ost_source,
ACPI_OST_SC_INSERT_IN_PROGRESS, NULL);
error = acpi_bus_scan(handle);
if (error) {
acpi_handle_warn(handle, "Namespace scan failure\n");

2
drivers/acpi/video.c
View File

@@ -846,7 +846,7 @@ acpi_video_init_brightness(struct acpi_video_device *device)
for (i = 2; i < br->count; i++)
if (level_old == br->levels[i])
break;
if (i == br->count)
if (i == br->count || !level)
level = max_level;
}

2
drivers/block/brd.c
View File

@@ -545,7 +545,7 @@ static struct kobject *brd_probe(dev_t dev, int *part, void *data)
mutex_lock(&brd_devices_mutex);
brd = brd_init_one(MINOR(dev) >> part_shift);
kobj = brd ? get_disk(brd->brd_disk) : ERR_PTR(-ENOMEM);
kobj = brd ? get_disk(brd->brd_disk) : NULL;
mutex_unlock(&brd_devices_mutex);
*part = 0;

2
drivers/block/loop.c
View File

@@ -1741,7 +1741,7 @@ static struct kobject *loop_probe(dev_t dev, int *part, void *data)
if (err < 0)
err = loop_add(&lo, MINOR(dev) >> part_shift);
if (err < 0)
kobj = ERR_PTR(err);
kobj = NULL;
else
kobj = get_disk(lo->lo_disk);
mutex_unlock(&loop_index_mutex);

9
drivers/cpufreq/cpufreq_stats.c
View File

@@ -21,7 +21,9 @@
#include <linux/spinlock.h>
#include <linux/notifier.h>
#include <asm/cputime.h>
#ifdef CONFIG_BL_SWITCHER
#include <asm/bL_switcher.h>
#endif
static spinlock_t cpufreq_stats_lock;
@@ -448,6 +450,7 @@ static void cpufreq_stats_cleanup(void)
}
}
#ifdef CONFIG_BL_SWITCHER
static int cpufreq_stats_switcher_notifier(struct notifier_block *nfb,
unsigned long action, void *_arg)
{
@@ -472,6 +475,7 @@ static int cpufreq_stats_switcher_notifier(struct notifier_block *nfb,
static struct notifier_block switcher_notifier = {
.notifier_call = cpufreq_stats_switcher_notifier,
};
#endif
static int __init cpufreq_stats_init(void)
{
@@ -479,15 +483,18 @@ static int __init cpufreq_stats_init(void)
spin_lock_init(&cpufreq_stats_lock);
ret = cpufreq_stats_setup();
#ifdef CONFIG_BL_SWITCHER
if (!ret)
bL_switcher_register_notifier(&switcher_notifier);
#endif
return ret;
}
static void __exit cpufreq_stats_exit(void)
{
#ifdef CONFIG_BL_SWITCHER
bL_switcher_unregister_notifier(&switcher_notifier);
#endif
cpufreq_stats_cleanup();
}

12
drivers/firmware/dmi_scan.c
View File

@@ -551,9 +551,15 @@ static bool dmi_matches(const struct dmi_system_id *dmi)
int s = dmi->matches[i].slot;
if (s == DMI_NONE)
break;
if (dmi_ident[s]
&& strstr(dmi_ident[s], dmi->matches[i].substr))
continue;
if (dmi_ident[s]) {
if (!dmi->matches[i].exact_match &&
strstr(dmi_ident[s], dmi->matches[i].substr))
continue;
else if (dmi->matches[i].exact_match &&
!strcmp(dmi_ident[s], dmi->matches[i].substr))
continue;
}
/* No match */
return false;
}

24
drivers/gpu/drm/i915/intel_lvds.c
View File

@@ -869,6 +869,30 @@ static const struct dmi_system_id intel_no_lvds[] = {
DMI_MATCH(DMI_PRODUCT_NAME, "ESPRIMO Q900"),
},
},
{
.callback = intel_no_lvds_dmi_callback,
.ident = "Intel D410PT",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "Intel"),
DMI_MATCH(DMI_BOARD_NAME, "D410PT"),
},
},
{
.callback = intel_no_lvds_dmi_callback,
.ident = "Intel D425KT",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "Intel"),
DMI_EXACT_MATCH(DMI_BOARD_NAME, "D425KT"),
},
},
{
.callback = intel_no_lvds_dmi_callback,
.ident = "Intel D510MO",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "Intel"),
DMI_EXACT_MATCH(DMI_BOARD_NAME, "D510MO"),
},
},
{ } /* terminating entry */
};

2
drivers/gpu/drm/nouveau/core/engine/disp/hdanva3.c
View File

@@ -36,6 +36,8 @@ nva3_hda_eld(struct nv50_disp_priv *priv, int or, u8 *data, u32 size)
if (data && data[0]) {
for (i = 0; i < size; i++)
nv_wr32(priv, 0x61c440 + soff, (i << 8) | data[i]);
for (; i < 0x60; i++)
nv_wr32(priv, 0x61c440 + soff, (i << 8));
nv_mask(priv, 0x61c448 + soff, 0x80000003, 0x80000003);
} else
if (data) {

2
drivers/gpu/drm/nouveau/core/engine/disp/hdanvd0.c
View File

@@ -41,6 +41,8 @@ nvd0_hda_eld(struct nv50_disp_priv *priv, int or, u8 *data, u32 size)
if (data && data[0]) {
for (i = 0; i < size; i++)
nv_wr32(priv, 0x10ec00 + soff, (i << 8) | data[i]);
for (; i < 0x60; i++)
nv_wr32(priv, 0x10ec00 + soff, (i << 8));
nv_mask(priv, 0x10ec10 + soff, 0x80000003, 0x80000003);
} else
if (data) {

8
drivers/gpu/drm/nouveau/core/engine/disp/sornv50.c
View File

@@ -47,14 +47,8 @@ int
nv50_sor_mthd(struct nouveau_object *object, u32 mthd, void *args, u32 size)
{
struct nv50_disp_priv *priv = (void *)object->engine;
struct nouveau_bios *bios = nouveau_bios(priv);
const u16 type = (mthd & NV50_DISP_SOR_MTHD_TYPE) >> 12;
const u8 head = (mthd & NV50_DISP_SOR_MTHD_HEAD) >> 3;
const u8 link = (mthd & NV50_DISP_SOR_MTHD_LINK) >> 2;
const u8 or = (mthd & NV50_DISP_SOR_MTHD_OR);
const u16 mask = (0x0100 << head) | (0x0040 << link) | (0x0001 << or);
struct dcb_output outp;
u8 ver, hdr;
u32 data;
int ret = -EINVAL;
@@ -62,8 +56,6 @@ nv50_sor_mthd(struct nouveau_object *object, u32 mthd, void *args, u32 size)
return -EINVAL;
data = *(u32 *)args;
if (type && !dcb_outp_match(bios, type, mask, &ver, &hdr, &outp))
return -ENODEV;
switch (mthd & ~0x3f) {
case NV50_DISP_SOR_PWR:

11
drivers/hwmon/lm90.c
View File

@@ -278,7 +278,7 @@ static const struct lm90_params lm90_params[] = {
[max6696] = {
.flags = LM90_HAVE_EMERGENCY
| LM90_HAVE_EMERGENCY_ALARM | LM90_HAVE_TEMP3,
.alert_alarms = 0x187c,
.alert_alarms = 0x1c7c,
.max_convrate = 6,
.reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
},
@@ -1500,19 +1500,22 @@ static void lm90_alert(struct i2c_client *client, unsigned int flag)
if ((alarms & 0x7f) == 0 && (alarms2 & 0xfe) == 0) {
dev_info(&client->dev, "Everything OK\n");
} else {
if (alarms & 0x61)
if ((alarms & 0x61) || (alarms2 & 0x80))
dev_warn(&client->dev,
"temp%d out of range, please check!\n", 1);
if (alarms & 0x1a)
if ((alarms & 0x1a) || (alarms2 & 0x20))
dev_warn(&client->dev,
"temp%d out of range, please check!\n", 2);
if (alarms & 0x04)
dev_warn(&client->dev,
"temp%d diode open, please check!\n", 2);
if (alarms2 & 0x18)
if (alarms2 & 0x5a)
dev_warn(&client->dev,
"temp%d out of range, please check!\n", 3);
if (alarms2 & 0x04)
dev_warn(&client->dev,
"temp%d diode open, please check!\n", 3);
/*
* Disable ALERT# output, because these chips don't implement

2
drivers/idle/intel_idle.c
View File

@@ -359,7 +359,7 @@ static int intel_idle(struct cpuidle_device *dev,
if (!(lapic_timer_reliable_states & (1 << (cstate))))
clockevents_notify(CLOCK_EVT_NOTIFY_BROADCAST_ENTER, &cpu);
if (!need_resched()) {
if (!current_set_polling_and_test()) {
__monitor((void *)&current_thread_info()->flags, 0, 0);
smp_mb();

2
drivers/media/platform/sh_vou.c
View File

@@ -776,7 +776,7 @@ static int sh_vou_try_fmt_vid_out(struct file *file, void *priv,
v4l_bound_align_image(&pix->width, 0, VOU_MAX_IMAGE_WIDTH, 1,
&pix->height, 0, VOU_MAX_IMAGE_HEIGHT, 1, 0);
for (i = 0; ARRAY_SIZE(vou_fmt); i++)
for (i = 0; i < ARRAY_SIZE(vou_fmt); i++)
if (vou_fmt[i].pfmt == pix->pixelformat)
return 0;

6
drivers/misc/atmel_pwm.c
View File

@@ -90,8 +90,10 @@ int pwm_channel_alloc(int index, struct pwm_channel *ch)
unsigned long flags;
int status = 0;
/* insist on PWM init, with this signal pinned out */
if (!pwm || !(pwm->mask & 1 << index))
if (!pwm)
return -EPROBE_DEFER;
if (!(pwm->mask & 1 << index))
return -ENODEV;
if (index < 0 || index >= PWM_NCHAN || !ch)

10
drivers/misc/mei/nfc.c
View File

@@ -485,8 +485,11 @@ int mei_nfc_host_init(struct mei_device *dev)
if (ndev->cl_info)
return 0;
cl_info = mei_cl_allocate(dev);
cl = mei_cl_allocate(dev);
ndev->cl_info = mei_cl_allocate(dev);
ndev->cl = mei_cl_allocate(dev);
cl = ndev->cl;
cl_info = ndev->cl_info;
if (!cl || !cl_info) {
ret = -ENOMEM;
@@ -527,10 +530,9 @@ int mei_nfc_host_init(struct mei_device *dev)
cl->device_uuid = mei_nfc_guid;
list_add_tail(&cl->device_link, &dev->device_list);
ndev->cl_info = cl_info;
ndev->cl = cl;
ndev->req_id = 1;
INIT_WORK(&ndev->init_work, mei_nfc_init);

6
drivers/net/can/c_can/c_can.c
View File

@@ -814,9 +814,6 @@ static int c_can_do_rx_poll(struct net_device *dev, int quota)
msg_ctrl_save = priv->read_reg(priv,
C_CAN_IFACE(MSGCTRL_REG, 0));
if (msg_ctrl_save & IF_MCONT_EOB)
return num_rx_pkts;
if (msg_ctrl_save & IF_MCONT_MSGLST) {
c_can_handle_lost_msg_obj(dev, 0, msg_obj);
num_rx_pkts++;
@@ -824,6 +821,9 @@ static int c_can_do_rx_poll(struct net_device *dev, int quota)
continue;
}
if (msg_ctrl_save & IF_MCONT_EOB)
return num_rx_pkts;
if (!(msg_ctrl_save & IF_MCONT_NEWDAT))
continue;

20
drivers/net/can/usb/kvaser_usb.c
View File

@@ -1544,9 +1544,9 @@ static int kvaser_usb_init_one(struct usb_interface *intf,
return 0;
}
static void kvaser_usb_get_endpoints(const struct usb_interface *intf,
struct usb_endpoint_descriptor **in,
struct usb_endpoint_descriptor **out)
static int kvaser_usb_get_endpoints(const struct usb_interface *intf,
struct usb_endpoint_descriptor **in,
struct usb_endpoint_descriptor **out)
{
const struct usb_host_interface *iface_desc;
struct usb_endpoint_descriptor *endpoint;
@@ -1557,12 +1557,18 @@ static void kvaser_usb_get_endpoints(const struct usb_interface *intf,
for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
endpoint = &iface_desc->endpoint[i].desc;
if (usb_endpoint_is_bulk_in(endpoint))
if (!*in && usb_endpoint_is_bulk_in(endpoint))
*in = endpoint;
if (usb_endpoint_is_bulk_out(endpoint))
if (!*out && usb_endpoint_is_bulk_out(endpoint))
*out = endpoint;
/* use first bulk endpoint for in and out */
if (*in && *out)
return 0;
}
return -ENODEV;
}
static int kvaser_usb_probe(struct usb_interface *intf,
@@ -1576,8 +1582,8 @@ static int kvaser_usb_probe(struct usb_interface *intf,
if (!dev)
return -ENOMEM;
kvaser_usb_get_endpoints(intf, &dev->bulk_in, &dev->bulk_out);
if (!dev->bulk_in || !dev->bulk_out) {
err = kvaser_usb_get_endpoints(intf, &dev->bulk_in, &dev->bulk_out);
if (err) {
dev_err(&intf->dev, "Cannot get usb endpoint(s)");
return err;
}

3
drivers/net/ethernet/chelsio/cxgb3/sge.c
View File

@@ -1600,7 +1600,8 @@ static void write_ofld_wr(struct adapter *adap, struct sk_buff *skb,
flits = skb_transport_offset(skb) / 8;
sgp = ndesc == 1 ? (struct sg_ent *)&d->flit[flits] : sgl;
sgl_flits = make_sgl(skb, sgp, skb_transport_header(skb),
skb->tail - skb->transport_header,
skb_tail_pointer(skb) -
skb_transport_header(skb),
adap->pdev);
if (need_skb_unmap()) {
setup_deferred_unmapping(skb, adap->pdev, sgp, sgl_flits);

2
drivers/net/ethernet/mellanox/mlx4/cmd.c
View File

@@ -1544,7 +1544,7 @@ static void mlx4_master_deactivate_admin_state(struct mlx4_priv *priv, int slave
vp_oper->vlan_idx = NO_INDX;
}
if (NO_INDX != vp_oper->mac_idx) {
__mlx4_unregister_mac(&priv->dev, port, vp_oper->mac_idx);
__mlx4_unregister_mac(&priv->dev, port, vp_oper->state.mac);
vp_oper->mac_idx = NO_INDX;
}
}

13
drivers/net/virtio_net.c
View File

@@ -1096,11 +1096,6 @@ static int virtnet_cpu_callback(struct notifier_block *nfb,
{
struct virtnet_info *vi = container_of(nfb, struct virtnet_info, nb);
mutex_lock(&vi->config_lock);
if (!vi->config_enable)
goto done;
switch(action & ~CPU_TASKS_FROZEN) {
case CPU_ONLINE:
case CPU_DOWN_FAILED:
@@ -1114,8 +1109,6 @@ static int virtnet_cpu_callback(struct notifier_block *nfb,
break;
}
done:
mutex_unlock(&vi->config_lock);
return NOTIFY_OK;
}
@@ -1672,6 +1665,8 @@ static int virtnet_freeze(struct virtio_device *vdev)
struct virtnet_info *vi = vdev->priv;
int i;
unregister_hotcpu_notifier(&vi->nb);
/* Prevent config work handler from accessing the device */
mutex_lock(&vi->config_lock);
vi->config_enable = false;
@@ -1720,6 +1715,10 @@ static int virtnet_restore(struct virtio_device *vdev)
virtnet_set_queues(vi, vi->curr_queue_pairs);
rtnl_unlock();
err = register_hotcpu_notifier(&vi->nb);
if (err)
return err;
return 0;
}
#endif

42
drivers/net/wireless/iwlwifi/iwl-7000.c
View File

@@ -125,7 +125,7 @@ static const struct iwl_ht_params iwl7000_ht_params = {
const struct iwl_cfg iwl7260_2ac_cfg = {
.name = "Intel(R) Dual Band Wireless AC7260",
.name = "Intel(R) Dual Band Wireless AC 7260",
.fw_name_pre = IWL7260_FW_PRE,
IWL_DEVICE_7000,
.ht_params = &iwl7000_ht_params,
@@ -133,8 +133,44 @@ const struct iwl_cfg iwl7260_2ac_cfg = {
.nvm_calib_ver = IWL7260_TX_POWER_VERSION,
};
const struct iwl_cfg iwl3160_ac_cfg = {
.name = "Intel(R) Dual Band Wireless AC3160",
const struct iwl_cfg iwl7260_2n_cfg = {
.name = "Intel(R) Dual Band Wireless N 7260",
.fw_name_pre = IWL7260_FW_PRE,
IWL_DEVICE_7000,
.ht_params = &iwl7000_ht_params,
.nvm_ver = IWL7260_NVM_VERSION,
.nvm_calib_ver = IWL7260_TX_POWER_VERSION,
};
const struct iwl_cfg iwl7260_n_cfg = {
.name = "Intel(R) Wireless N 7260",
.fw_name_pre = IWL7260_FW_PRE,
IWL_DEVICE_7000,
.ht_params = &iwl7000_ht_params,
.nvm_ver = IWL7260_NVM_VERSION,
.nvm_calib_ver = IWL7260_TX_POWER_VERSION,
};
const struct iwl_cfg iwl3160_2ac_cfg = {
.name = "Intel(R) Dual Band Wireless AC 3160",
.fw_name_pre = IWL3160_FW_PRE,
IWL_DEVICE_7000,
.ht_params = &iwl7000_ht_params,
.nvm_ver = IWL3160_NVM_VERSION,
.nvm_calib_ver = IWL3160_TX_POWER_VERSION,
};
const struct iwl_cfg iwl3160_2n_cfg = {
.name = "Intel(R) Dual Band Wireless N 3160",
.fw_name_pre = IWL3160_FW_PRE,
IWL_DEVICE_7000,
.ht_params = &iwl7000_ht_params,
.nvm_ver = IWL3160_NVM_VERSION,
.nvm_calib_ver = IWL3160_TX_POWER_VERSION,
};
const struct iwl_cfg iwl3160_n_cfg = {
.name = "Intel(R) Wireless N 3160",
.fw_name_pre = IWL3160_FW_PRE,
IWL_DEVICE_7000,
.ht_params = &iwl7000_ht_params,

6
drivers/net/wireless/iwlwifi/iwl-config.h
View File

@@ -321,6 +321,10 @@ extern const struct iwl_cfg iwl105_bgn_cfg;
extern const struct iwl_cfg iwl105_bgn_d_cfg;
extern const struct iwl_cfg iwl135_bgn_cfg;
extern const struct iwl_cfg iwl7260_2ac_cfg;
extern const struct iwl_cfg iwl3160_ac_cfg;
extern const struct iwl_cfg iwl7260_2n_cfg;
extern const struct iwl_cfg iwl7260_n_cfg;
extern const struct iwl_cfg iwl3160_2ac_cfg;
extern const struct iwl_cfg iwl3160_2n_cfg;
extern const struct iwl_cfg iwl3160_n_cfg;
#endif /* __IWL_CONFIG_H__ */

79
drivers/net/wireless/iwlwifi/pcie/drv.c
View File

@@ -267,10 +267,83 @@ static DEFINE_PCI_DEVICE_TABLE(iwl_hw_card_ids) = {
/* 7000 Series */
{IWL_PCI_DEVICE(0x08B1, 0x4070, iwl7260_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0x4062, iwl7260_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0x4072, iwl7260_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0x4170, iwl7260_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0x4060, iwl7260_2n_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0x406A, iwl7260_2n_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0x4160, iwl7260_2n_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0x4062, iwl7260_n_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0x4162, iwl7260_n_cfg)},
{IWL_PCI_DEVICE(0x08B2, 0x4270, iwl7260_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B2, 0x4272, iwl7260_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B2, 0x4260, iwl7260_2n_cfg)},
{IWL_PCI_DEVICE(0x08B2, 0x426A, iwl7260_2n_cfg)},
{IWL_PCI_DEVICE(0x08B2, 0x4262, iwl7260_n_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0x4470, iwl7260_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0x4472, iwl7260_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0x4460, iwl7260_2n_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0x446A, iwl7260_2n_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0x4462, iwl7260_n_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0x4870, iwl7260_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0x486E, iwl7260_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0x4570, iwl7260_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0x4560, iwl7260_2n_cfg)},
{IWL_PCI_DEVICE(0x08B2, 0x4370, iwl7260_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B2, 0x4360, iwl7260_2n_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0x5070, iwl7260_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0x4020, iwl7260_2n_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0x402A, iwl7260_2n_cfg)},
{IWL_PCI_DEVICE(0x08B2, 0x4220, iwl7260_2n_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0x4420, iwl7260_2n_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0xC070, iwl7260_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B3, 0x0070, iwl3160_ac_cfg)},
{IWL_PCI_DEVICE(0x08B3, 0x8070, iwl3160_ac_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0xC072, iwl7260_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0xC170, iwl7260_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0xC060, iwl7260_2n_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0xC06A, iwl7260_2n_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0xC160, iwl7260_2n_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0xC062, iwl7260_n_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0xC162, iwl7260_n_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0xC770, iwl7260_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0xC760, iwl7260_2n_cfg)},
{IWL_PCI_DEVICE(0x08B2, 0xC270, iwl7260_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B2, 0xC272, iwl7260_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B2, 0xC260, iwl7260_2n_cfg)},
{IWL_PCI_DEVICE(0x08B2, 0xC26A, iwl7260_n_cfg)},
{IWL_PCI_DEVICE(0x08B2, 0xC262, iwl7260_n_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0xC470, iwl7260_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0xC472, iwl7260_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0xC460, iwl7260_2n_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0xC462, iwl7260_n_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0xC570, iwl7260_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0xC560, iwl7260_2n_cfg)},
{IWL_PCI_DEVICE(0x08B2, 0xC370, iwl7260_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0xC360, iwl7260_2n_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0xC020, iwl7260_2n_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0xC02A, iwl7260_2n_cfg)},
{IWL_PCI_DEVICE(0x08B2, 0xC220, iwl7260_2n_cfg)},
{IWL_PCI_DEVICE(0x08B1, 0xC420, iwl7260_2n_cfg)},
/* 3160 Series */
{IWL_PCI_DEVICE(0x08B3, 0x0070, iwl3160_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B3, 0x0072, iwl3160_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B3, 0x0170, iwl3160_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B3, 0x0172, iwl3160_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B3, 0x0060, iwl3160_2n_cfg)},
{IWL_PCI_DEVICE(0x08B3, 0x0062, iwl3160_n_cfg)},
{IWL_PCI_DEVICE(0x08B4, 0x0270, iwl3160_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B4, 0x0272, iwl3160_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B3, 0x0470, iwl3160_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B3, 0x0472, iwl3160_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B4, 0x0370, iwl3160_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B3, 0x8070, iwl3160_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B3, 0x8072, iwl3160_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B3, 0x8170, iwl3160_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B3, 0x8172, iwl3160_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B3, 0x8060, iwl3160_2n_cfg)},
{IWL_PCI_DEVICE(0x08B3, 0x8062, iwl3160_n_cfg)},
{IWL_PCI_DEVICE(0x08B4, 0x8270, iwl3160_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B3, 0x8470, iwl3160_2ac_cfg)},
{IWL_PCI_DEVICE(0x08B3, 0x8570, iwl3160_2ac_cfg)},
{0}
};

6
drivers/net/wireless/libertas/debugfs.c
View File

@@ -913,7 +913,10 @@ static ssize_t lbs_debugfs_write(struct file *f, const char __user *buf,
char *p2;
struct debug_data *d = f->private_data;
pdata = kmalloc(cnt, GFP_KERNEL);
if (cnt == 0)
return 0;
pdata = kmalloc(cnt + 1, GFP_KERNEL);
if (pdata == NULL)
return 0;
@@ -922,6 +925,7 @@ static ssize_t lbs_debugfs_write(struct file *f, const char __user *buf,
kfree(pdata);
return 0;
}
pdata[cnt] = '\0';
p0 = pdata;
for (i = 0; i < num_of_items; i++) {

11
drivers/net/wireless/rt2x00/rt2800lib.c
View File

@@ -3400,10 +3400,13 @@ void rt2800_link_tuner(struct rt2x00_dev *rt2x00dev, struct link_qual *qual,
vgc = rt2800_get_default_vgc(rt2x00dev);
if (rt2x00_rt(rt2x00dev, RT5592) && qual->rssi > -65)
vgc += 0x20;
else if (qual->rssi > -80)
vgc += 0x10;
if (rt2x00_rt(rt2x00dev, RT5592)) {
if (qual->rssi > -65)
vgc += 0x20;
} else {
if (qual->rssi > -80)
vgc += 0x10;
}
rt2800_set_vgc(rt2x00dev, qual, vgc);
}

12
drivers/net/wireless/rt2x00/rt2800usb.c
View File

@@ -148,6 +148,8 @@ static bool rt2800usb_txstatus_timeout(struct rt2x00_dev *rt2x00dev)
return false;
}
#define TXSTATUS_READ_INTERVAL 1000000
static bool rt2800usb_tx_sta_fifo_read_completed(struct rt2x00_dev *rt2x00dev,
int urb_status, u32 tx_status)
{
@@ -176,8 +178,9 @@ static bool rt2800usb_tx_sta_fifo_read_completed(struct rt2x00_dev *rt2x00dev,
queue_work(rt2x00dev->workqueue, &rt2x00dev->txdone_work);
if (rt2800usb_txstatus_pending(rt2x00dev)) {
/* Read register after 250 us */
hrtimer_start(&rt2x00dev->txstatus_timer, ktime_set(0, 250000),
/* Read register after 1 ms */
hrtimer_start(&rt2x00dev->txstatus_timer,
ktime_set(0, TXSTATUS_READ_INTERVAL),
HRTIMER_MODE_REL);
return false;
}
@@ -202,8 +205,9 @@ static void rt2800usb_async_read_tx_status(struct rt2x00_dev *rt2x00dev)
if (test_and_set_bit(TX_STATUS_READING, &rt2x00dev->flags))
return;
/* Read TX_STA_FIFO register after 500 us */
hrtimer_start(&rt2x00dev->txstatus_timer, ktime_set(0, 500000),
/* Read TX_STA_FIFO register after 2 ms */
hrtimer_start(&rt2x00dev->txstatus_timer,
ktime_set(0, 2*TXSTATUS_READ_INTERVAL),
HRTIMER_MODE_REL);
}

3
drivers/net/wireless/rt2x00/rt2x00dev.c
View File

@@ -181,6 +181,7 @@ static void rt2x00lib_autowakeup(struct work_struct *work)
static void rt2x00lib_bc_buffer_iter(void *data, u8 *mac,
struct ieee80211_vif *vif)
{
struct ieee80211_tx_control control = {};
struct rt2x00_dev *rt2x00dev = data;
struct sk_buff *skb;
@@ -195,7 +196,7 @@ static void rt2x00lib_bc_buffer_iter(void *data, u8 *mac,
*/
skb = ieee80211_get_buffered_bc(rt2x00dev->hw, vif);
while (skb) {
rt2x00mac_tx(rt2x00dev->hw, NULL, skb);
rt2x00mac_tx(rt2x00dev->hw, &control, skb);
skb = ieee80211_get_buffered_bc(rt2x00dev->hw, vif);
}
}

2
drivers/net/wireless/rt2x00/rt2x00lib.h
View File

@@ -146,7 +146,7 @@ void rt2x00queue_remove_l2pad(struct sk_buff *skb, unsigned int header_length);
* @local: frame is not from mac80211
*/
int rt2x00queue_write_tx_frame(struct data_queue *queue, struct sk_buff *skb,
bool local);
struct ieee80211_sta *sta, bool local);
/**
* rt2x00queue_update_beacon - Send new beacon from mac80211

7
drivers/net/wireless/rt2x00/rt2x00mac.c
View File

@@ -90,7 +90,7 @@ static int rt2x00mac_tx_rts_cts(struct rt2x00_dev *rt2x00dev,
frag_skb->data, data_length, tx_info,
(struct ieee80211_rts *)(skb->data));
retval = rt2x00queue_write_tx_frame(queue, skb, true);
retval = rt2x00queue_write_tx_frame(queue, skb, NULL, true);
if (retval) {
dev_kfree_skb_any(skb);
rt2x00_warn(rt2x00dev, "Failed to send RTS/CTS frame\n");
@@ -151,7 +151,7 @@ void rt2x00mac_tx(struct ieee80211_hw *hw,
goto exit_fail;
}
if (unlikely(rt2x00queue_write_tx_frame(queue, skb, false)))
if (unlikely(rt2x00queue_write_tx_frame(queue, skb, control->sta, false)))
goto exit_fail;
/*
@@ -754,6 +754,9 @@ void rt2x00mac_flush(struct ieee80211_hw *hw, u32 queues, bool drop)
struct rt2x00_dev *rt2x00dev = hw->priv;
struct data_queue *queue;
if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
return;
tx_queue_for_each(rt2x00dev, queue)
rt2x00queue_flush_queue(queue, drop);
}

4
drivers/net/wireless/rt2x00/rt2x00queue.c
View File

@@ -635,7 +635,7 @@ static void rt2x00queue_bar_check(struct queue_entry *entry)
}
int rt2x00queue_write_tx_frame(struct data_queue *queue, struct sk_buff *skb,
bool local)
struct ieee80211_sta *sta, bool local)
{
struct ieee80211_tx_info *tx_info;
struct queue_entry *entry;
@@ -649,7 +649,7 @@ int rt2x00queue_write_tx_frame(struct data_queue *queue, struct sk_buff *skb,
* after that we are free to use the skb->cb array
* for our information.
*/
rt2x00queue_create_tx_descriptor(queue->rt2x00dev, skb, &txdesc, NULL);
rt2x00queue_create_tx_descriptor(queue->rt2x00dev, skb, &txdesc, sta);
/*
* All information is retrieved from the skb->cb array,

1
drivers/net/xen-netback/common.h
View File

@@ -88,6 +88,7 @@ struct xenvif {
unsigned long credit_usec;
unsigned long remaining_credit;
struct timer_list credit_timeout;
u64 credit_window_start;
/* Statistics */
unsigned long rx_gso_checksum_fixup;

3
drivers/net/xen-netback/interface.c
View File

@@ -275,8 +275,7 @@ struct xenvif *xenvif_alloc(struct device *parent, domid_t domid,
vif->credit_bytes = vif->remaining_credit = ~0UL;
vif->credit_usec = 0UL;
init_timer(&vif->credit_timeout);
/* Initialize 'expires' now: it's used to track the credit window. */
vif->credit_timeout.expires = jiffies;
vif->credit_window_start = get_jiffies_64();
dev->netdev_ops = &xenvif_netdev_ops;
dev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_TSO;

10
drivers/net/xen-netback/netback.c
View File

@@ -1423,9 +1423,8 @@ out:
static bool tx_credit_exceeded(struct xenvif *vif, unsigned size)
{
unsigned long now = jiffies;
unsigned long next_credit =
vif->credit_timeout.expires +
u64 now = get_jiffies_64();
u64 next_credit = vif->credit_window_start +
msecs_to_jiffies(vif->credit_usec / 1000);
/* Timer could already be pending in rare cases. */
@@ -1433,8 +1432,8 @@ static bool tx_credit_exceeded(struct xenvif *vif, unsigned size)
return true;
/* Passed the point where we can replenish credit? */
if (time_after_eq(now, next_credit)) {
vif->credit_timeout.expires = now;
if (time_after_eq64(now, next_credit)) {
vif->credit_window_start = now;
tx_add_credit(vif);
}
@@ -1446,6 +1445,7 @@ static bool tx_credit_exceeded(struct xenvif *vif, unsigned size)
tx_credit_callback;
mod_timer(&vif->credit_timeout,
next_credit);
vif->credit_window_start = next_credit;
return true;
}

153
drivers/net/xen-netback/xenbus.c
View File

@@ -24,6 +24,12 @@
struct backend_info {
struct xenbus_device *dev;
struct xenvif *vif;
/* This is the state that will be reflected in xenstore when any
* active hotplug script completes.
*/
enum xenbus_state state;
enum xenbus_state frontend_state;
struct xenbus_watch hotplug_status_watch;
u8 have_hotplug_status_watch:1;
@@ -33,11 +39,15 @@ static int connect_rings(struct backend_info *);
static void connect(struct backend_info *);
static void backend_create_xenvif(struct backend_info *be);
static void unregister_hotplug_status_watch(struct backend_info *be);
static void set_backend_state(struct backend_info *be,
enum xenbus_state state);
static int netback_remove(struct xenbus_device *dev)
{
struct backend_info *be = dev_get_drvdata(&dev->dev);
set_backend_state(be, XenbusStateClosed);
unregister_hotplug_status_watch(be);
if (be->vif) {
kobject_uevent(&dev->dev.kobj, KOBJ_OFFLINE);
@@ -126,6 +136,8 @@ static int netback_probe(struct xenbus_device *dev,
if (err)
goto fail;
be->state = XenbusStateInitWait;
/* This kicks hotplug scripts, so do it immediately. */
backend_create_xenvif(be);
@@ -198,24 +210,113 @@ static void backend_create_xenvif(struct backend_info *be)
kobject_uevent(&dev->dev.kobj, KOBJ_ONLINE);
}
static void disconnect_backend(struct xenbus_device *dev)
static void backend_disconnect(struct backend_info *be)
{
struct backend_info *be = dev_get_drvdata(&dev->dev);
if (be->vif)
xenvif_disconnect(be->vif);
}
static void destroy_backend(struct xenbus_device *dev)
static void backend_connect(struct backend_info *be)
{
struct backend_info *be = dev_get_drvdata(&dev->dev);
if (be->vif)
connect(be);
}
if (be->vif) {
kobject_uevent(&dev->dev.kobj, KOBJ_OFFLINE);
xenbus_rm(XBT_NIL, dev->nodename, "hotplug-status");
xenvif_free(be->vif);
be->vif = NULL;
static inline void backend_switch_state(struct backend_info *be,
enum xenbus_state state)
{
struct xenbus_device *dev = be->dev;
pr_debug("%s -> %s\n", dev->nodename, xenbus_strstate(state));
be->state = state;
/* If we are waiting for a hotplug script then defer the
* actual xenbus state change.
*/
if (!be->have_hotplug_status_watch)
xenbus_switch_state(dev, state);
}
/* Handle backend state transitions:
*
* The backend state starts in InitWait and the following transitions are
* allowed.
*
* InitWait -> Connected
*
* ^ \ |
* | \ |
* | \ |
* | \ |
* | \ |
* | \ |
* | V V
*
* Closed <-> Closing
*
* The state argument specifies the eventual state of the backend and the
* function transitions to that state via the shortest path.
*/
static void set_backend_state(struct backend_info *be,
enum xenbus_state state)
{
while (be->state != state) {
switch (be->state) {
case XenbusStateClosed:
switch (state) {
case XenbusStateInitWait:
case XenbusStateConnected:
pr_info("%s: prepare for reconnect\n",
be->dev->nodename);
backend_switch_state(be, XenbusStateInitWait);
break;
case XenbusStateClosing:
backend_switch_state(be, XenbusStateClosing);
break;
default:
BUG();
}
break;
case XenbusStateInitWait:
switch (state) {
case XenbusStateConnected:
backend_connect(be);
backend_switch_state(be, XenbusStateConnected);
break;
case XenbusStateClosing:
case XenbusStateClosed:
backend_switch_state(be, XenbusStateClosing);
break;
default:
BUG();
}
break;
case XenbusStateConnected:
switch (state) {
case XenbusStateInitWait:
case XenbusStateClosing:
case XenbusStateClosed:
backend_disconnect(be);
backend_switch_state(be, XenbusStateClosing);
break;
default:
BUG();
}
break;
case XenbusStateClosing:
switch (state) {
case XenbusStateInitWait:
case XenbusStateConnected:
case XenbusStateClosed:
backend_switch_state(be, XenbusStateClosed);
break;
default:
BUG();
}
break;
default:
BUG();
}
}
}
@@ -227,41 +328,33 @@ static void frontend_changed(struct xenbus_device *dev,
{
struct backend_info *be = dev_get_drvdata(&dev->dev);
pr_debug("frontend state %s", xenbus_strstate(frontend_state));
pr_debug("%s -> %s\n", dev->otherend, xenbus_strstate(frontend_state));
be->frontend_state = frontend_state;
switch (frontend_state) {
case XenbusStateInitialising:
if (dev->state == XenbusStateClosed) {
printk(KERN_INFO "%s: %s: prepare for reconnect\n",
__func__, dev->nodename);
xenbus_switch_state(dev, XenbusStateInitWait);
}
set_backend_state(be, XenbusStateInitWait);
break;
case XenbusStateInitialised:
break;
case XenbusStateConnected:
if (dev->state == XenbusStateConnected)
break;
if (be->vif)
connect(be);
set_backend_state(be, XenbusStateConnected);
break;
case XenbusStateClosing:
disconnect_backend(dev);
xenbus_switch_state(dev, XenbusStateClosing);
set_backend_state(be, XenbusStateClosing);
break;
case XenbusStateClosed:
xenbus_switch_state(dev, XenbusStateClosed);
set_backend_state(be, XenbusStateClosed);
if (xenbus_dev_is_online(dev))
break;
destroy_backend(dev);
/* fall through if not online */
case XenbusStateUnknown:
set_backend_state(be, XenbusStateClosed);
device_unregister(&dev->dev);
break;
@@ -354,7 +447,9 @@ static void hotplug_status_changed(struct xenbus_watch *watch,
if (IS_ERR(str))
return;
if (len == sizeof("connected")-1 && !memcmp(str, "connected", len)) {
xenbus_switch_state(be->dev, XenbusStateConnected);
/* Complete any pending state change */
xenbus_switch_state(be->dev, be->state);
/* Not interested in this watch anymore. */
unregister_hotplug_status_watch(be);
}
@@ -384,12 +479,8 @@ static void connect(struct backend_info *be)
err = xenbus_watch_pathfmt(dev, &be->hotplug_status_watch,
hotplug_status_changed,
"%s/%s", dev->nodename, "hotplug-status");
if (err) {
/* Switch now, since we can't do a watch. */
xenbus_switch_state(dev, XenbusStateConnected);
} else {
if (!err)
be->have_hotplug_status_watch = 1;
}
netif_wake_queue(be->vif->dev);
}

19
drivers/pci/access.c
View File

@@ -484,28 +484,29 @@ static inline bool pcie_cap_has_lnkctl(const struct pci_dev *dev)
{
int type = pci_pcie_type(dev);
return pcie_cap_version(dev) > 1 ||
return type == PCI_EXP_TYPE_ENDPOINT ||
type == PCI_EXP_TYPE_LEG_END ||
type == PCI_EXP_TYPE_ROOT_PORT ||
type == PCI_EXP_TYPE_ENDPOINT ||
type == PCI_EXP_TYPE_LEG_END;
type == PCI_EXP_TYPE_UPSTREAM ||
type == PCI_EXP_TYPE_DOWNSTREAM ||
type == PCI_EXP_TYPE_PCI_BRIDGE ||
type == PCI_EXP_TYPE_PCIE_BRIDGE;
}
static inline bool pcie_cap_has_sltctl(const struct pci_dev *dev)
{
int type = pci_pcie_type(dev);
return pcie_cap_version(dev) > 1 ||
type == PCI_EXP_TYPE_ROOT_PORT ||
(type == PCI_EXP_TYPE_DOWNSTREAM &&
pcie_caps_reg(dev) & PCI_EXP_FLAGS_SLOT);
return (type == PCI_EXP_TYPE_ROOT_PORT ||
type == PCI_EXP_TYPE_DOWNSTREAM) &&
pcie_caps_reg(dev) & PCI_EXP_FLAGS_SLOT;
}
static inline bool pcie_cap_has_rtctl(const struct pci_dev *dev)
{
int type = pci_pcie_type(dev);
return pcie_cap_version(dev) > 1 ||
type == PCI_EXP_TYPE_ROOT_PORT ||
return type == PCI_EXP_TYPE_ROOT_PORT ||
type == PCI_EXP_TYPE_RC_EC;
}

3
drivers/scsi/aacraid/commctrl.c
View File

@@ -510,7 +510,8 @@ static int aac_send_raw_srb(struct aac_dev* dev, void __user * arg)
goto cleanup;
}
if (fibsize > (dev->max_fib_size - sizeof(struct aac_fibhdr))) {
if ((fibsize < (sizeof(struct user_aac_srb) - sizeof(struct user_sgentry))) ||
(fibsize > (dev->max_fib_size - sizeof(struct aac_fibhdr)))) {
rcode = -EINVAL;
goto cleanup;
}

1
drivers/usb/core/hcd.c
View File

@@ -1010,6 +1010,7 @@ static int register_root_hub(struct usb_hcd *hcd)
dev_name(&usb_dev->dev), retval);
return retval;
}
usb_dev->lpm_capable = usb_device_supports_lpm(usb_dev);
}
retval = usb_new_device (usb_dev);

23
drivers/usb/core/hub.c
View File

@@ -135,7 +135,7 @@ struct usb_hub *usb_hub_to_struct_hub(struct usb_device *hdev)
return usb_get_intfdata(hdev->actconfig->interface[0]);
}
static int usb_device_supports_lpm(struct usb_device *udev)
int usb_device_supports_lpm(struct usb_device *udev)
{
/* USB 2.1 (and greater) devices indicate LPM support through
* their USB 2.0 Extended Capabilities BOS descriptor.
@@ -156,6 +156,11 @@ static int usb_device_supports_lpm(struct usb_device *udev)
"Power management will be impacted.\n");
return 0;
}
/* udev is root hub */
if (!udev->parent)
return 1;
if (udev->parent->lpm_capable)
return 1;
@@ -1124,6 +1129,11 @@ static void hub_activate(struct usb_hub *hub, enum hub_activation_type type)
usb_clear_port_feature(hub->hdev, port1,
USB_PORT_FEAT_C_ENABLE);
}
if (portchange & USB_PORT_STAT_C_RESET) {
need_debounce_delay = true;
usb_clear_port_feature(hub->hdev, port1,
USB_PORT_FEAT_C_RESET);
}
if ((portchange & USB_PORT_STAT_C_BH_RESET) &&
hub_is_superspeed(hub->hdev)) {
need_debounce_delay = true;
@@ -1557,10 +1567,15 @@ static int hub_configure(struct usb_hub *hub,
if (hub->has_indicators && blinkenlights)
hub->indicator [0] = INDICATOR_CYCLE;
for (i = 0; i < hdev->maxchild; i++)
if (usb_hub_create_port_device(hub, i + 1) < 0)
for (i = 0; i < hdev->maxchild; i++) {
ret = usb_hub_create_port_device(hub, i + 1);
if (ret < 0) {
dev_err(hub->intfdev,
"couldn't create port%d device.\n", i + 1);
hdev->maxchild = i;
goto fail_keep_maxchild;
}
}
usb_hub_adjust_deviceremovable(hdev, hub->descriptor);
@@ -1568,6 +1583,8 @@ static int hub_configure(struct usb_hub *hub,
return 0;
fail:
hdev->maxchild = 0;
fail_keep_maxchild:
dev_err (hub_dev, "config failed, %s (err %d)\n",
message, ret);
/* hub_disconnect() frees urb and descriptor */

1
drivers/usb/core/usb.h
View File

@@ -35,6 +35,7 @@ extern int usb_get_device_descriptor(struct usb_device *dev,
unsigned int size);
extern int usb_get_bos_descriptor(struct usb_device *dev);
extern void usb_release_bos_descriptor(struct usb_device *dev);
extern int usb_device_supports_lpm(struct usb_device *udev);
extern char *usb_cache_string(struct usb_device *udev, int index);
extern int usb_set_configuration(struct usb_device *dev, int configuration);
extern int usb_choose_configuration(struct usb_device *udev);

4
drivers/usb/serial/mos7840.c
View File

@@ -1593,7 +1593,11 @@ static int mos7840_tiocmget(struct tty_struct *tty)
return -ENODEV;
status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
if (status != 1)
return -EIO;
status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
if (status != 1)
return -EIO;
result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
| ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
| ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)

17
drivers/usb/serial/option.c
View File

@@ -1376,6 +1376,23 @@ static const struct usb_device_id option_ids[] = {
.driver_info = (kernel_ulong_t)&net_intf2_blacklist },
{ USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1426, 0xff, 0xff, 0xff), /* ZTE MF91 */
.driver_info = (kernel_ulong_t)&net_intf2_blacklist },
{ USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1533, 0xff, 0xff, 0xff) },
{ USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1534, 0xff, 0xff, 0xff) },
{ USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1535, 0xff, 0xff, 0xff) },
{ USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1545, 0xff, 0xff, 0xff) },
{ USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1546, 0xff, 0xff, 0xff) },
{ USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1547, 0xff, 0xff, 0xff) },
{ USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1565, 0xff, 0xff, 0xff) },
{ USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1566, 0xff, 0xff, 0xff) },
{ USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1567, 0xff, 0xff, 0xff) },
{ USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1589, 0xff, 0xff, 0xff) },
{ USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1590, 0xff, 0xff, 0xff) },
{ USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1591, 0xff, 0xff, 0xff) },
{ USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1592, 0xff, 0xff, 0xff) },
{ USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1594, 0xff, 0xff, 0xff) },
{ USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1596, 0xff, 0xff, 0xff) },
{ USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1598, 0xff, 0xff, 0xff) },
{ USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x1600, 0xff, 0xff, 0xff) },
{ USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x2002, 0xff,
0xff, 0xff), .driver_info = (kernel_ulong_t)&zte_k3765_z_blacklist },
{ USB_DEVICE_AND_INTERFACE_INFO(ZTE_VENDOR_ID, 0x2003, 0xff, 0xff, 0xff) },

3
drivers/video/adf/adf_client.c
View File

@@ -49,6 +49,9 @@ int adf_interface_blank(struct adf_interface *intf, u8 state)
if (!intf->ops || !intf->ops->blank)
return -EOPNOTSUPP;
if (state > DRM_MODE_DPMS_OFF)
return -EINVAL;
mutex_lock(&dev->client_lock);
if (state != DRM_MODE_DPMS_ON)
flush_kthread_worker(&dev->post_worker);

4
drivers/video/adf/adf_fbdev.c
View File

@@ -519,10 +519,10 @@ int adf_fbdev_blank(int blank, struct fb_info *info)
dpms_state = DRM_MODE_DPMS_STANDBY;
break;
case FB_BLANK_VSYNC_SUSPEND:
dpms_state = DRM_MODE_DPMS_STANDBY;
dpms_state = DRM_MODE_DPMS_SUSPEND;
break;
case FB_BLANK_HSYNC_SUSPEND:
dpms_state = DRM_MODE_DPMS_SUSPEND;
dpms_state = DRM_MODE_DPMS_STANDBY;
break;
case FB_BLANK_POWERDOWN:
dpms_state = DRM_MODE_DPMS_OFF;

9
drivers/video/backlight/atmel-pwm-bl.c
View File

@@ -118,7 +118,7 @@ static const struct backlight_ops atmel_pwm_bl_ops = {
.update_status = atmel_pwm_bl_set_intensity,
};
static int __init atmel_pwm_bl_probe(struct platform_device *pdev)
static int atmel_pwm_bl_probe(struct platform_device *pdev)
{
struct backlight_properties props;
const struct atmel_pwm_bl_platform_data *pdata;
@@ -203,7 +203,7 @@ err_free_mem:
return retval;
}
static int __exit atmel_pwm_bl_remove(struct platform_device *pdev)
static int atmel_pwm_bl_remove(struct platform_device *pdev)
{
struct atmel_pwm_bl *pwmbl = platform_get_drvdata(pdev);
@@ -222,10 +222,11 @@ static struct platform_driver atmel_pwm_bl_driver = {
.name = "atmel-pwm-bl",
},
/* REVISIT add suspend() and resume() */
.remove = __exit_p(atmel_pwm_bl_remove),
.probe = atmel_pwm_bl_probe,
.remove = atmel_pwm_bl_remove,
};
module_platform_driver_probe(atmel_pwm_bl_driver, atmel_pwm_bl_probe);
module_platform_driver(atmel_pwm_bl_driver);
MODULE_AUTHOR("Hans-Christian egtvedt <hans-christian.egtvedt@atmel.com>");
MODULE_DESCRIPTION("Atmel PWM backlight driver");

40
drivers/video/hyperv_fb.c
View File

@@ -795,12 +795,21 @@ static int hvfb_remove(struct hv_device *hdev)
}
static DEFINE_PCI_DEVICE_TABLE(pci_stub_id_table) = {
{
.vendor = PCI_VENDOR_ID_MICROSOFT,
.device = PCI_DEVICE_ID_HYPERV_VIDEO,
},
{ /* end of list */ }
};
static const struct hv_vmbus_device_id id_table[] = {
/* Synthetic Video Device GUID */
{HV_SYNTHVID_GUID},
{}
};
MODULE_DEVICE_TABLE(pci, pci_stub_id_table);
MODULE_DEVICE_TABLE(vmbus, id_table);
static struct hv_driver hvfb_drv = {
@@ -810,14 +819,43 @@ static struct hv_driver hvfb_drv = {
.remove = hvfb_remove,
};
static int hvfb_pci_stub_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
return 0;
}
static void hvfb_pci_stub_remove(struct pci_dev *pdev)
{
}
static struct pci_driver hvfb_pci_stub_driver = {
.name = KBUILD_MODNAME,
.id_table = pci_stub_id_table,
.probe = hvfb_pci_stub_probe,
.remove = hvfb_pci_stub_remove,
};
static int __init hvfb_drv_init(void)
{
return vmbus_driver_register(&hvfb_drv);
int ret;
ret = vmbus_driver_register(&hvfb_drv);
if (ret != 0)
return ret;
ret = pci_register_driver(&hvfb_pci_stub_driver);
if (ret != 0) {
vmbus_driver_unregister(&hvfb_drv);
return ret;
}
return 0;
}
static void __exit hvfb_drv_exit(void)
{
pci_unregister_driver(&hvfb_pci_stub_driver);
vmbus_driver_unregister(&hvfb_drv);
}

16
fs/configfs/dir.c
View File

@@ -56,10 +56,19 @@ static void configfs_d_iput(struct dentry * dentry,
struct configfs_dirent *sd = dentry->d_fsdata;
if (sd) {
BUG_ON(sd->s_dentry != dentry);
/* Coordinate with configfs_readdir */
spin_lock(&configfs_dirent_lock);
sd->s_dentry = NULL;
/* Coordinate with configfs_attach_attr where will increase
* sd->s_count and update sd->s_dentry to new allocated one.
* Only set sd->dentry to null when this dentry is the only
* sd owner.
* If not do so, configfs_d_iput may run just after
* configfs_attach_attr and set sd->s_dentry to null
* even it's still in use.
*/
if (atomic_read(&sd->s_count) <= 2)
sd->s_dentry = NULL;
spin_unlock(&configfs_dirent_lock);
configfs_put(sd);
}
@@ -426,8 +435,11 @@ static int configfs_attach_attr(struct configfs_dirent * sd, struct dentry * den
struct configfs_attribute * attr = sd->s_element;
int error;
spin_lock(&configfs_dirent_lock);
dentry->d_fsdata = configfs_get(sd);
sd->s_dentry = dentry;
spin_unlock(&configfs_dirent_lock);
error = configfs_create(dentry, (attr->ca_mode & S_IALLUGO) | S_IFREG,
configfs_init_file);
if (error) {

6
fs/exec.c
View File

@@ -1669,6 +1669,12 @@ int __get_dumpable(unsigned long mm_flags)
return (ret > SUID_DUMP_USER) ? SUID_DUMP_ROOT : ret;
}
/*
* This returns the actual value of the suid_dumpable flag. For things
* that are using this for checking for privilege transitions, it must
* test against SUID_DUMP_USER rather than treating it as a boolean
* value.
*/
int get_dumpable(struct mm_struct *mm)
{
return __get_dumpable(mm->flags);

22
fs/nfs/nfs4proc.c
View File

@@ -1160,29 +1160,24 @@ _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
int ret;
if (!data->rpc_done) {
ret = data->rpc_status;
goto err;
if (data->rpc_status) {
ret = data->rpc_status;
goto err;
}
/* cached opens have already been processed */
goto update;
}
ret = -ESTALE;
if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
!(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
!(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
goto err;
ret = -ENOMEM;
state = nfs4_get_open_state(inode, data->owner);
if (state == NULL)
goto err;
ret = nfs_refresh_inode(inode, &data->f_attr);
if (ret)
goto err;
if (data->o_res.delegation_type != 0)
nfs4_opendata_check_deleg(data, state);
update:
update_open_stateid(state, &data->o_res.stateid, NULL,
data->o_arg.fmode);
atomic_inc(&state->count);
return state;
err:
@@ -4572,6 +4567,7 @@ static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock
status = 0;
}
request->fl_ops->fl_release_private(request);
request->fl_ops = NULL;
out:
return status;
}

15
fs/nfsd/export.c
View File

@@ -536,16 +536,12 @@ static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
if (err)
goto out3;
exp.ex_anon_uid= make_kuid(&init_user_ns, an_int);
if (!uid_valid(exp.ex_anon_uid))
goto out3;
/* anon gid */
err = get_int(&mesg, &an_int);
if (err)
goto out3;
exp.ex_anon_gid= make_kgid(&init_user_ns, an_int);
if (!gid_valid(exp.ex_anon_gid))
goto out3;
/* fsid */
err = get_int(&mesg, &an_int);
@@ -583,6 +579,17 @@ static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
exp.ex_uuid);
if (err)
goto out4;
/*
* For some reason exportfs has been passing down an
* invalid (-1) uid & gid on the "dummy" export which it
* uses to test export support. To make sure exportfs
* sees errors from check_export we therefore need to
* delay these checks till after check_export:
*/
if (!uid_valid(exp.ex_anon_uid))
goto out4;
if (!gid_valid(exp.ex_anon_gid))
goto out4;
}
expp = svc_export_lookup(&exp);

215
fs/nfsd/vfs.c
View File

@@ -297,8 +297,104 @@ commit_metadata(struct svc_fh *fhp)
}
/*
* Set various file attributes.
* N.B. After this call fhp needs an fh_put
* Go over the attributes and take care of the small differences between
* NFS semantics and what Linux expects.
*/
static void
nfsd_sanitize_attrs(struct inode *inode, struct iattr *iap)
{
/*
* NFSv2 does not differentiate between "set-[ac]time-to-now"
* which only requires access, and "set-[ac]time-to-X" which
* requires ownership.
* So if it looks like it might be "set both to the same time which
* is close to now", and if inode_change_ok fails, then we
* convert to "set to now" instead of "set to explicit time"
*
* We only call inode_change_ok as the last test as technically
* it is not an interface that we should be using.
*/
#define BOTH_TIME_SET (ATTR_ATIME_SET | ATTR_MTIME_SET)
#define MAX_TOUCH_TIME_ERROR (30*60)
if ((iap->ia_valid & BOTH_TIME_SET) == BOTH_TIME_SET &&
iap->ia_mtime.tv_sec == iap->ia_atime.tv_sec) {
/*
* Looks probable.
*
* Now just make sure time is in the right ballpark.
* Solaris, at least, doesn't seem to care what the time
* request is. We require it be within 30 minutes of now.
*/
time_t delta = iap->ia_atime.tv_sec - get_seconds();
if (delta < 0)
delta = -delta;
if (delta < MAX_TOUCH_TIME_ERROR &&
inode_change_ok(inode, iap) != 0) {
/*
* Turn off ATTR_[AM]TIME_SET but leave ATTR_[AM]TIME.
* This will cause notify_change to set these times
* to "now"
*/
iap->ia_valid &= ~BOTH_TIME_SET;
}
}
/* sanitize the mode change */
if (iap->ia_valid & ATTR_MODE) {
iap->ia_mode &= S_IALLUGO;
iap->ia_mode |= (inode->i_mode & ~S_IALLUGO);
}
/* Revoke setuid/setgid on chown */
if (!S_ISDIR(inode->i_mode) &&
(((iap->ia_valid & ATTR_UID) && !uid_eq(iap->ia_uid, inode->i_uid)) ||
((iap->ia_valid & ATTR_GID) && !gid_eq(iap->ia_gid, inode->i_gid)))) {
iap->ia_valid |= ATTR_KILL_PRIV;
if (iap->ia_valid & ATTR_MODE) {
/* we're setting mode too, just clear the s*id bits */
iap->ia_mode &= ~S_ISUID;
if (iap->ia_mode & S_IXGRP)
iap->ia_mode &= ~S_ISGID;
} else {
/* set ATTR_KILL_* bits and let VFS handle it */
iap->ia_valid |= (ATTR_KILL_SUID | ATTR_KILL_SGID);
}
}
}
static __be32
nfsd_get_write_access(struct svc_rqst *rqstp, struct svc_fh *fhp,
struct iattr *iap)
{
struct inode *inode = fhp->fh_dentry->d_inode;
int host_err;
if (iap->ia_size < inode->i_size) {
__be32 err;
err = nfsd_permission(rqstp, fhp->fh_export, fhp->fh_dentry,
NFSD_MAY_TRUNC | NFSD_MAY_OWNER_OVERRIDE);
if (err)
return err;
}
host_err = get_write_access(inode);
if (host_err)
goto out_nfserrno;
host_err = locks_verify_truncate(inode, NULL, iap->ia_size);
if (host_err)
goto out_put_write_access;
return 0;
out_put_write_access:
put_write_access(inode);
out_nfserrno:
return nfserrno(host_err);
}
/*
* Set various file attributes. After this call fhp needs an fh_put.
*/
__be32
nfsd_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp, struct iattr *iap,
@@ -332,114 +428,43 @@ nfsd_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp, struct iattr *iap,
if (!iap->ia_valid)
goto out;
nfsd_sanitize_attrs(inode, iap);
/*
* NFSv2 does not differentiate between "set-[ac]time-to-now"
* which only requires access, and "set-[ac]time-to-X" which
* requires ownership.
* So if it looks like it might be "set both to the same time which
* is close to now", and if inode_change_ok fails, then we
* convert to "set to now" instead of "set to explicit time"
*
* We only call inode_change_ok as the last test as technically
* it is not an interface that we should be using. It is only
* valid if the filesystem does not define it's own i_op->setattr.
*/
#define BOTH_TIME_SET (ATTR_ATIME_SET | ATTR_MTIME_SET)
#define MAX_TOUCH_TIME_ERROR (30*60)
if ((iap->ia_valid & BOTH_TIME_SET) == BOTH_TIME_SET &&
iap->ia_mtime.tv_sec == iap->ia_atime.tv_sec) {
/*
* Looks probable.
*
* Now just make sure time is in the right ballpark.
* Solaris, at least, doesn't seem to care what the time
* request is. We require it be within 30 minutes of now.
*/
time_t delta = iap->ia_atime.tv_sec - get_seconds();
if (delta < 0)
delta = -delta;
if (delta < MAX_TOUCH_TIME_ERROR &&
inode_change_ok(inode, iap) != 0) {
/*
* Turn off ATTR_[AM]TIME_SET but leave ATTR_[AM]TIME.
* This will cause notify_change to set these times
* to "now"
*/
iap->ia_valid &= ~BOTH_TIME_SET;
}
}
/*
* The size case is special.
* It changes the file as well as the attributes.
* The size case is special, it changes the file in addition to the
* attributes.
*/
if (iap->ia_valid & ATTR_SIZE) {
if (iap->ia_size < inode->i_size) {
err = nfsd_permission(rqstp, fhp->fh_export, dentry,
NFSD_MAY_TRUNC|NFSD_MAY_OWNER_OVERRIDE);
if (err)
goto out;
}
host_err = get_write_access(inode);
if (host_err)
goto out_nfserr;
err = nfsd_get_write_access(rqstp, fhp, iap);
if (err)
goto out;
size_change = 1;
host_err = locks_verify_truncate(inode, NULL, iap->ia_size);
if (host_err) {
put_write_access(inode);
goto out_nfserr;
}
}
/* sanitize the mode change */
if (iap->ia_valid & ATTR_MODE) {
iap->ia_mode &= S_IALLUGO;
iap->ia_mode |= (inode->i_mode & ~S_IALLUGO);
}
/* Revoke setuid/setgid on chown */
if (!S_ISDIR(inode->i_mode) &&
(((iap->ia_valid & ATTR_UID) && !uid_eq(iap->ia_uid, inode->i_uid)) ||
((iap->ia_valid & ATTR_GID) && !gid_eq(iap->ia_gid, inode->i_gid)))) {
iap->ia_valid |= ATTR_KILL_PRIV;
if (iap->ia_valid & ATTR_MODE) {
/* we're setting mode too, just clear the s*id bits */
iap->ia_mode &= ~S_ISUID;
if (iap->ia_mode & S_IXGRP)
iap->ia_mode &= ~S_ISGID;
} else {
/* set ATTR_KILL_* bits and let VFS handle it */
iap->ia_valid |= (ATTR_KILL_SUID | ATTR_KILL_SGID);
}
}
/* Change the attributes. */
iap->ia_valid |= ATTR_CTIME;
err = nfserr_notsync;
if (!check_guard || guardtime == inode->i_ctime.tv_sec) {
host_err = nfsd_break_lease(inode);
if (host_err)
goto out_nfserr;
fh_lock(fhp);
host_err = notify_change(dentry, iap);
err = nfserrno(host_err);
fh_unlock(fhp);
if (check_guard && guardtime != inode->i_ctime.tv_sec) {
err = nfserr_notsync;
goto out_put_write_access;
}
host_err = nfsd_break_lease(inode);
if (host_err)
goto out_put_write_access_nfserror;
fh_lock(fhp);
host_err = notify_change(dentry, iap);
fh_unlock(fhp);
out_put_write_access_nfserror:
err = nfserrno(host_err);
out_put_write_access:
if (size_change)
put_write_access(inode);
if (!err)
commit_metadata(fhp);
out:
return err;
out_nfserr:
err = nfserrno(host_err);
goto out;
}
#if defined(CONFIG_NFSD_V2_ACL) || \

3
include/linux/binfmts.h
View File

@@ -99,9 +99,6 @@ extern void setup_new_exec(struct linux_binprm * bprm);
extern void would_dump(struct linux_binprm *, struct file *);
extern int suid_dumpable;
#define SUID_DUMP_DISABLE 0 /* No setuid dumping */
#define SUID_DUMP_USER 1 /* Dump as user of process */
#define SUID_DUMP_ROOT 2 /* Dump as root */
/* Stack area protections */
#define EXSTACK_DEFAULT 0 /* Whatever the arch defaults to */

6
include/linux/mod_devicetable.h
View File

@@ -456,7 +456,8 @@ enum dmi_field {
};
struct dmi_strmatch {
unsigned char slot;
unsigned char slot:7;
unsigned char exact_match:1;
char substr[79];
};
@@ -474,7 +475,8 @@ struct dmi_system_id {
*/
#define dmi_device_id dmi_system_id
#define DMI_MATCH(a, b) { a, b }
#define DMI_MATCH(a, b) { .slot = a, .substr = b }
#define DMI_EXACT_MATCH(a, b) { .slot = a, .substr = b, .exact_match = 1 }
#define PLATFORM_NAME_SIZE 20
#define PLATFORM_MODULE_PREFIX "platform:"

82
include/linux/sched.h
View File

@@ -332,6 +332,10 @@ static inline void arch_pick_mmap_layout(struct mm_struct *mm) {}
extern void set_dumpable(struct mm_struct *mm, int value);
extern int get_dumpable(struct mm_struct *mm);
#define SUID_DUMP_DISABLE 0 /* No setuid dumping */
#define SUID_DUMP_USER 1 /* Dump as user of process */
#define SUID_DUMP_ROOT 2 /* Dump as root */
/* mm flags */
/* dumpable bits */
#define MMF_DUMPABLE 0 /* core dump is permitted */
@@ -2485,34 +2489,98 @@ static inline int tsk_is_polling(struct task_struct *p)
{
return task_thread_info(p)->status & TS_POLLING;
}
static inline void current_set_polling(void)
static inline void __current_set_polling(void)
{
current_thread_info()->status |= TS_POLLING;
}
static inline void current_clr_polling(void)
static inline bool __must_check current_set_polling_and_test(void)
{
__current_set_polling();
/*
* Polling state must be visible before we test NEED_RESCHED,
* paired by resched_task()
*/
smp_mb();
return unlikely(tif_need_resched());
}
static inline void __current_clr_polling(void)
{
current_thread_info()->status &= ~TS_POLLING;
smp_mb__after_clear_bit();
}
static inline bool __must_check current_clr_polling_and_test(void)
{
__current_clr_polling();
/*
* Polling state must be visible before we test NEED_RESCHED,
* paired by resched_task()
*/
smp_mb();
return unlikely(tif_need_resched());
}
#elif defined(TIF_POLLING_NRFLAG)
static inline int tsk_is_polling(struct task_struct *p)
{
return test_tsk_thread_flag(p, TIF_POLLING_NRFLAG);
}
static inline void current_set_polling(void)
static inline void __current_set_polling(void)
{
set_thread_flag(TIF_POLLING_NRFLAG);
}
static inline void current_clr_polling(void)
static inline bool __must_check current_set_polling_and_test(void)
{
__current_set_polling();
/*
* Polling state must be visible before we test NEED_RESCHED,
* paired by resched_task()
*
* XXX: assumes set/clear bit are identical barrier wise.
*/
smp_mb__after_clear_bit();
return unlikely(tif_need_resched());
}
static inline void __current_clr_polling(void)
{
clear_thread_flag(TIF_POLLING_NRFLAG);
}
static inline bool __must_check current_clr_polling_and_test(void)
{
__current_clr_polling();
/*
* Polling state must be visible before we test NEED_RESCHED,
* paired by resched_task()
*/
smp_mb__after_clear_bit();
return unlikely(tif_need_resched());
}
#else
static inline int tsk_is_polling(struct task_struct *p) { return 0; }
static inline void current_set_polling(void) { }
static inline void current_clr_polling(void) { }
static inline void __current_set_polling(void) { }
static inline void __current_clr_polling(void) { }
static inline bool __must_check current_set_polling_and_test(void)
{
return unlikely(tif_need_resched());
}
static inline bool __must_check current_clr_polling_and_test(void)
{
return unlikely(tif_need_resched());
}
#endif
/*

2
include/linux/thread_info.h
View File

@@ -107,6 +107,8 @@ static inline int test_ti_thread_flag(struct thread_info *ti, int flag)
#define set_need_resched() set_thread_flag(TIF_NEED_RESCHED)
#define clear_need_resched() clear_thread_flag(TIF_NEED_RESCHED)
#define tif_need_resched() test_thread_flag(TIF_NEED_RESCHED)
#if defined TIF_RESTORE_SIGMASK && !defined HAVE_SET_RESTORE_SIGMASK
/*
* An arch can define its own version of set_restore_sigmask() to get the

1
include/net/ip6_fib.h
View File

@@ -165,6 +165,7 @@ static inline struct inet6_dev *ip6_dst_idev(struct dst_entry *dst)
static inline void rt6_clean_expires(struct rt6_info *rt)
{
rt->rt6i_flags &= ~RTF_EXPIRES;
rt->dst.expires = 0;
}
static inline void rt6_set_expires(struct rt6_info *rt, unsigned long expires)

2
include/net/ip_tunnels.h
View File

@@ -113,7 +113,7 @@ struct ip_tunnel *ip_tunnel_lookup(struct ip_tunnel_net *itn,
__be32 key);
int ip_tunnel_rcv(struct ip_tunnel *tunnel, struct sk_buff *skb,
const struct tnl_ptk_info *tpi, bool log_ecn_error);
const struct tnl_ptk_info *tpi, int hdr_len, bool log_ecn_error);
int ip_tunnel_changelink(struct net_device *dev, struct nlattr *tb[],
struct ip_tunnel_parm *p);
int ip_tunnel_newlink(struct net_device *dev, struct nlattr *tb[],

9
include/sound/compress_driver.h
View File

@@ -171,4 +171,13 @@ static inline void snd_compr_fragment_elapsed(struct snd_compr_stream *stream)
wake_up(&stream->runtime->sleep);
}
static inline void snd_compr_drain_notify(struct snd_compr_stream *stream)
{
if (snd_BUG_ON(!stream))
return;
stream->runtime->state = SNDRV_PCM_STATE_SETUP;
wake_up(&stream->runtime->sleep);
}
#endif

49
include/trace/events/sched.h
View File

@@ -579,6 +579,55 @@ TRACE_EVENT(sched_task_usage_ratio,
__entry->ratio)
);
/*
* Tracepoint for HMP (CONFIG_SCHED_HMP) task migrations,
* marking the forced transition of runnable or running tasks.
*/
TRACE_EVENT(sched_hmp_migrate_force_running,
TP_PROTO(struct task_struct *tsk, int running),
TP_ARGS(tsk, running),
TP_STRUCT__entry(
__array(char, comm, TASK_COMM_LEN)
__field(int, running)
),
TP_fast_assign(
memcpy(__entry->comm, tsk->comm, TASK_COMM_LEN);
__entry->running = running;
),
TP_printk("running=%d comm=%s",
__entry->running, __entry->comm)
);
/*
* Tracepoint for HMP (CONFIG_SCHED_HMP) task migrations,
* marking the forced transition of runnable or running
* tasks when a task is about to go idle.
*/
TRACE_EVENT(sched_hmp_migrate_idle_running,
TP_PROTO(struct task_struct *tsk, int running),
TP_ARGS(tsk, running),
TP_STRUCT__entry(
__array(char, comm, TASK_COMM_LEN)
__field(int, running)
),
TP_fast_assign(
memcpy(__entry->comm, tsk->comm, TASK_COMM_LEN);
__entry->running = running;
),
TP_printk("running=%d comm=%s",
__entry->running, __entry->comm)
);
/*
* Tracepoint for HMP (CONFIG_SCHED_HMP) task migrations.
*/

12
include/uapi/linux/perf_event.h
View File

@@ -425,13 +425,15 @@ struct perf_event_mmap_page {
/*
* Control data for the mmap() data buffer.
*
* User-space reading the @data_head value should issue an rmb(), on
* SMP capable platforms, after reading this value -- see
* perf_event_wakeup().
* User-space reading the @data_head value should issue an smp_rmb(),
* after reading this value.
*
* When the mapping is PROT_WRITE the @data_tail value should be
* written by userspace to reflect the last read data. In this case
* the kernel will not over-write unread data.
* written by userspace to reflect the last read data, after issueing
* an smp_mb() to separate the data read from the ->data_tail store.
* In this case the kernel will not over-write unread data.
*
* See perf_output_put_handle() for the data ordering.
*/
__u64 data_head; /* head in the data section */
__u64 data_tail; /* user-space written tail */

12
include/uapi/video/adf.h
View File

@@ -22,7 +22,7 @@
#include <drm/drm_mode.h>
#define ADF_NAME_LEN 32
#define ADF_MAX_CUSTOM_DATA_SIZE PAGE_SIZE
#define ADF_MAX_CUSTOM_DATA_SIZE 4096
enum adf_interface_type {
ADF_INTF_DSI = 0,
@@ -126,7 +126,7 @@ struct adf_buffer_config {
__s64 acquire_fence;
};
#define ADF_MAX_BUFFERS (PAGE_SIZE / sizeof(struct adf_buffer_config))
#define ADF_MAX_BUFFERS (4096 / sizeof(struct adf_buffer_config))
/**
* struct adf_post_config - request to flip to a new set of buffers
@@ -152,7 +152,7 @@ struct adf_post_config {
__s64 complete_fence;
};
#define ADF_MAX_INTERFACES (PAGE_SIZE / sizeof(__u32))
#define ADF_MAX_INTERFACES (4096 / sizeof(__u32))
/**
* struct adf_simple_buffer_allocate - request to allocate a "simple" buffer
@@ -233,7 +233,7 @@ struct adf_device_data {
size_t custom_data_size;
void __user *custom_data;
};
#define ADF_MAX_ATTACHMENTS (PAGE_SIZE / sizeof(struct adf_attachment))
#define ADF_MAX_ATTACHMENTS (4096 / sizeof(struct adf_attachment_config))
/**
* struct adf_device_data - describes a display interface
@@ -273,7 +273,7 @@ struct adf_interface_data {
size_t custom_data_size;
void __user *custom_data;
};
#define ADF_MAX_MODES (PAGE_SIZE / sizeof(struct drm_mode_modeinfo))
#define ADF_MAX_MODES (4096 / sizeof(struct drm_mode_modeinfo))
/**
* struct adf_overlay_engine_data - describes an overlay engine
@@ -293,7 +293,7 @@ struct adf_overlay_engine_data {
size_t custom_data_size;
void __user *custom_data;
};
#define ADF_MAX_SUPPORTED_FORMATS (PAGE_SIZE / sizeof(__u32))
#define ADF_MAX_SUPPORTED_FORMATS (4096 / sizeof(__u32))
#define ADF_SET_EVENT _IOW('D', 0, struct adf_set_event)
#define ADF_BLANK _IOW('D', 1, __u8)

37
ipc/shm.c
View File

@@ -208,15 +208,18 @@ static void shm_open(struct vm_area_struct *vma)
*/
static void shm_destroy(struct ipc_namespace *ns, struct shmid_kernel *shp)
{
struct file *shm_file;
shm_file = shp->shm_file;
shp->shm_file = NULL;
ns->shm_tot -= (shp->shm_segsz + PAGE_SIZE - 1) >> PAGE_SHIFT;
shm_rmid(ns, shp);
shm_unlock(shp);
if (!is_file_hugepages(shp->shm_file))
shmem_lock(shp->shm_file, 0, shp->mlock_user);
if (!is_file_hugepages(shm_file))
shmem_lock(shm_file, 0, shp->mlock_user);
else if (shp->mlock_user)
user_shm_unlock(file_inode(shp->shm_file)->i_size,
shp->mlock_user);
fput (shp->shm_file);
user_shm_unlock(file_inode(shm_file)->i_size, shp->mlock_user);
fput(shm_file);
ipc_rcu_putref(shp, shm_rcu_free);
}
@@ -974,15 +977,25 @@ SYSCALL_DEFINE3(shmctl, int, shmid, int, cmd, struct shmid_ds __user *, buf)
ipc_lock_object(&shp->shm_perm);
if (!ns_capable(ns->user_ns, CAP_IPC_LOCK)) {
kuid_t euid = current_euid();
err = -EPERM;
if (!uid_eq(euid, shp->shm_perm.uid) &&
!uid_eq(euid, shp->shm_perm.cuid))
!uid_eq(euid, shp->shm_perm.cuid)) {
err = -EPERM;
goto out_unlock0;
if (cmd == SHM_LOCK && !rlimit(RLIMIT_MEMLOCK))
}
if (cmd == SHM_LOCK && !rlimit(RLIMIT_MEMLOCK)) {
err = -EPERM;
goto out_unlock0;
}
}
shm_file = shp->shm_file;
/* check if shm_destroy() is tearing down shp */
if (shm_file == NULL) {
err = -EIDRM;
goto out_unlock0;
}
if (is_file_hugepages(shm_file))
goto out_unlock0;
@@ -1101,6 +1114,14 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg, ulong *raddr,
goto out_unlock;
ipc_lock_object(&shp->shm_perm);
/* check if shm_destroy() is tearing down shp */
if (shp->shm_file == NULL) {
ipc_unlock_object(&shp->shm_perm);
err = -EIDRM;
goto out_unlock;
}
path = shp->shm_file->f_path;
path_get(&path);
shp->shm_nattch++;

9
kernel/cpu/idle.c
View File

@@ -44,7 +44,7 @@ static inline int cpu_idle_poll(void)
rcu_idle_enter();
trace_cpu_idle_rcuidle(0, smp_processor_id());
local_irq_enable();
while (!need_resched())
while (!tif_need_resched())
cpu_relax();
trace_cpu_idle_rcuidle(PWR_EVENT_EXIT, smp_processor_id());
rcu_idle_exit();
@@ -92,8 +92,7 @@ static void cpu_idle_loop(void)
if (cpu_idle_force_poll || tick_check_broadcast_expired()) {
cpu_idle_poll();
} else {
current_clr_polling();
if (!need_resched()) {
if (!current_clr_polling_and_test()) {
stop_critical_timings();
rcu_idle_enter();
arch_cpu_idle();
@@ -103,7 +102,7 @@ static void cpu_idle_loop(void)
} else {
local_irq_enable();
}
current_set_polling();
__current_set_polling();
}
arch_cpu_idle_exit();
}
@@ -129,7 +128,7 @@ void cpu_startup_entry(enum cpuhp_state state)
*/
boot_init_stack_canary();
#endif
current_set_polling();
__current_set_polling();
arch_cpu_idle_prepare();
cpu_idle_loop();
}

31
kernel/events/ring_buffer.c
View File

@@ -87,10 +87,31 @@ again:
goto out;
/*
* Publish the known good head. Rely on the full barrier implied
* by atomic_dec_and_test() order the rb->head read and this
* write.
* Since the mmap() consumer (userspace) can run on a different CPU:
*
* kernel user
*
* READ ->data_tail READ ->data_head
* smp_mb() (A) smp_rmb() (C)
* WRITE $data READ $data
* smp_wmb() (B) smp_mb() (D)
* STORE ->data_head WRITE ->data_tail
*
* Where A pairs with D, and B pairs with C.
*
* I don't think A needs to be a full barrier because we won't in fact
* write data until we see the store from userspace. So we simply don't
* issue the data WRITE until we observe it. Be conservative for now.
*
* OTOH, D needs to be a full barrier since it separates the data READ
* from the tail WRITE.
*
* For B a WMB is sufficient since it separates two WRITEs, and for C
* an RMB is sufficient since it separates two READs.
*
* See perf_output_begin().
*/
smp_wmb();
rb->user_page->data_head = head;
/*
@@ -154,9 +175,11 @@ int perf_output_begin(struct perf_output_handle *handle,
* Userspace could choose to issue a mb() before updating the
* tail pointer. So that all reads will be completed before the
* write is issued.
*
* See perf_output_put_handle().
*/
tail = ACCESS_ONCE(rb->user_page->data_tail);
smp_rmb();
smp_mb();
offset = head = local_read(&rb->head);
head += size;
if (unlikely(!perf_output_space(rb, tail, offset, head)))

3
kernel/ptrace.c
View File

@@ -257,7 +257,8 @@ ok:
if (task->mm)
dumpable = get_dumpable(task->mm);
rcu_read_lock();
if (!dumpable && !ptrace_has_cap(__task_cred(task)->user_ns, mode)) {
if (dumpable != SUID_DUMP_USER &&
!ptrace_has_cap(__task_cred(task)->user_ns, mode)) {
rcu_read_unlock();
return -EPERM;
}

219
kernel/sched/fair.c
View File

@@ -31,7 +31,6 @@
#include <linux/task_work.h>
#include <trace/events/sched.h>
#ifdef CONFIG_HMP_VARIABLE_SCALE
#include <linux/sysfs.h>
#include <linux/vmalloc.h>
#ifdef CONFIG_HMP_FREQUENCY_INVARIANT_SCALE
@@ -40,7 +39,6 @@
*/
#include <linux/cpufreq.h>
#endif /* CONFIG_HMP_FREQUENCY_INVARIANT_SCALE */
#endif /* CONFIG_HMP_VARIABLE_SCALE */
#include "sched.h"
@@ -1212,8 +1210,7 @@ static u32 __compute_runnable_contrib(u64 n)
return contrib + runnable_avg_yN_sum[n];
}
#ifdef CONFIG_HMP_VARIABLE_SCALE
#ifdef CONFIG_SCHED_HMP
#define HMP_VARIABLE_SCALE_SHIFT 16ULL
struct hmp_global_attr {
struct attribute attr;
@@ -1224,6 +1221,7 @@ struct hmp_global_attr {
int *value;
int (*to_sysfs)(int);
int (*from_sysfs)(int);
ssize_t (*to_sysfs_text)(char *buf, int buf_size);
};
#define HMP_DATA_SYSFS_MAX 8
@@ -1294,7 +1292,7 @@ struct cpufreq_extents {
static struct cpufreq_extents freq_scale[CONFIG_NR_CPUS];
#endif /* CONFIG_HMP_FREQUENCY_INVARIANT_SCALE */
#endif /* CONFIG_HMP_VARIABLE_SCALE */
#endif /* CONFIG_SCHED_HMP */
/* We can represent the historical contribution to runnable average as the
* coefficients of a geometric series. To do this we sub-divide our runnable
@@ -1340,7 +1338,7 @@ static __always_inline int __update_entity_runnable_avg(u64 now,
#endif /* CONFIG_HMP_FREQUENCY_INVARIANT_SCALE */
delta = now - sa->last_runnable_update;
#ifdef CONFIG_HMP_VARIABLE_SCALE
#ifdef CONFIG_SCHED_HMP
delta = hmp_variable_scale_convert(delta);
#endif
/*
@@ -3843,7 +3841,6 @@ static inline void hmp_next_down_delay(struct sched_entity *se, int cpu)
cpu_rq(cpu)->avg.hmp_last_up_migration = 0;
}
#ifdef CONFIG_HMP_VARIABLE_SCALE
/*
* Heterogenous multiprocessor (HMP) optimizations
*
@@ -3876,27 +3873,35 @@ static inline void hmp_next_down_delay(struct sched_entity *se, int cpu)
* The scale factor hmp_data.multiplier is a fixed point
* number: (32-HMP_VARIABLE_SCALE_SHIFT).HMP_VARIABLE_SCALE_SHIFT
*/
static u64 hmp_variable_scale_convert(u64 delta)
static inline u64 hmp_variable_scale_convert(u64 delta)
{
#ifdef CONFIG_HMP_VARIABLE_SCALE
u64 high = delta >> 32ULL;
u64 low = delta & 0xffffffffULL;
low *= hmp_data.multiplier;
high *= hmp_data.multiplier;
return (low >> HMP_VARIABLE_SCALE_SHIFT)
+ (high << (32ULL - HMP_VARIABLE_SCALE_SHIFT));
#else
return delta;
#endif
}
static ssize_t hmp_show(struct kobject *kobj,
struct attribute *attr, char *buf)
{
ssize_t ret = 0;
struct hmp_global_attr *hmp_attr =
container_of(attr, struct hmp_global_attr, attr);
int temp = *(hmp_attr->value);
int temp;
if (hmp_attr->to_sysfs_text != NULL)
return hmp_attr->to_sysfs_text(buf, PAGE_SIZE);
temp = *(hmp_attr->value);
if (hmp_attr->to_sysfs != NULL)
temp = hmp_attr->to_sysfs(temp);
ret = sprintf(buf, "%d\n", temp);
return ret;
return (ssize_t)sprintf(buf, "%d\n", temp);
}
static ssize_t hmp_store(struct kobject *a, struct attribute *attr,
@@ -3925,11 +3930,31 @@ static ssize_t hmp_store(struct kobject *a, struct attribute *attr,
return ret;
}
static ssize_t hmp_print_domains(char *outbuf, int outbufsize)
{
char buf[64];
const char nospace[] = "%s", space[] = " %s";
const char *fmt = nospace;
struct hmp_domain *domain;
struct list_head *pos;
int outpos = 0;
list_for_each(pos, &hmp_domains) {
domain = list_entry(pos, struct hmp_domain, hmp_domains);
if (cpumask_scnprintf(buf, 64, &domain->possible_cpus)) {
outpos += sprintf(outbuf+outpos, fmt, buf);
fmt = space;
}
}
strcat(outbuf, "\n");
return outpos+1;
}
#ifdef CONFIG_HMP_VARIABLE_SCALE
static int hmp_period_tofrom_sysfs(int value)
{
return (LOAD_AVG_PERIOD << HMP_VARIABLE_SCALE_SHIFT) / value;
}
#endif
/* max value for threshold is 1024 */
static int hmp_theshold_from_sysfs(int value)
{
@@ -3937,9 +3962,10 @@ static int hmp_theshold_from_sysfs(int value)
return -1;
return value;
}
#ifdef CONFIG_HMP_FREQUENCY_INVARIANT_SCALE
/* freqinvar control is only 0,1 off/on */
static int hmp_freqinvar_from_sysfs(int value)
#if defined(CONFIG_SCHED_HMP_LITTLE_PACKING) || \
defined(CONFIG_HMP_FREQUENCY_INVARIANT_SCALE)
/* toggle control is only 0,1 off/on */
static int hmp_toggle_from_sysfs(int value)
{
if (value < 0 || value > 1)
return -1;
@@ -3959,7 +3985,9 @@ static void hmp_attr_add(
const char *name,
int *value,
int (*to_sysfs)(int),
int (*from_sysfs)(int))
int (*from_sysfs)(int),
ssize_t (*to_sysfs_text)(char *, int),
umode_t mode)
{
int i = 0;
while (hmp_data.attributes[i] != NULL) {
@@ -3967,13 +3995,17 @@ static void hmp_attr_add(
if (i >= HMP_DATA_SYSFS_MAX)
return;
}
hmp_data.attr[i].attr.mode = 0644;
if (mode)
hmp_data.attr[i].attr.mode = mode;
else
hmp_data.attr[i].attr.mode = 0644;
hmp_data.attr[i].show = hmp_show;
hmp_data.attr[i].store = hmp_store;
hmp_data.attr[i].attr.name = name;
hmp_data.attr[i].value = value;
hmp_data.attr[i].to_sysfs = to_sysfs;
hmp_data.attr[i].from_sysfs = from_sysfs;
hmp_data.attr[i].to_sysfs_text = to_sysfs_text;
hmp_data.attributes[i] = &hmp_data.attr[i].attr;
hmp_data.attributes[i + 1] = NULL;
}
@@ -3982,40 +4014,59 @@ static int hmp_attr_init(void)
{
int ret;
memset(&hmp_data, sizeof(hmp_data), 0);
hmp_attr_add("hmp_domains",
NULL,
NULL,
NULL,
hmp_print_domains,
0444);
hmp_attr_add("up_threshold",
&hmp_up_threshold,
NULL,
hmp_theshold_from_sysfs,
NULL,
0);
hmp_attr_add("down_threshold",
&hmp_down_threshold,
NULL,
hmp_theshold_from_sysfs,
NULL,
0);
#ifdef CONFIG_HMP_VARIABLE_SCALE
/* by default load_avg_period_ms == LOAD_AVG_PERIOD
* meaning no change
*/
hmp_data.multiplier = hmp_period_tofrom_sysfs(LOAD_AVG_PERIOD);
hmp_attr_add("load_avg_period_ms",
&hmp_data.multiplier,
hmp_period_tofrom_sysfs,
hmp_period_tofrom_sysfs);
hmp_attr_add("up_threshold",
&hmp_up_threshold,
hmp_period_tofrom_sysfs,
NULL,
hmp_theshold_from_sysfs);
hmp_attr_add("down_threshold",
&hmp_down_threshold,
NULL,
hmp_theshold_from_sysfs);
0);
#endif
#ifdef CONFIG_HMP_FREQUENCY_INVARIANT_SCALE
/* default frequency-invariant scaling ON */
hmp_data.freqinvar_load_scale_enabled = 1;
hmp_attr_add("frequency_invariant_load_scale",
&hmp_data.freqinvar_load_scale_enabled,
NULL,
hmp_freqinvar_from_sysfs);
hmp_toggle_from_sysfs,
NULL,
0);
#endif
#ifdef CONFIG_SCHED_HMP_LITTLE_PACKING
hmp_attr_add("packing_enable",
&hmp_packing_enabled,
NULL,
hmp_freqinvar_from_sysfs);
hmp_toggle_from_sysfs,
NULL,
0);
hmp_attr_add("packing_limit",
&hmp_full_threshold,
NULL,
hmp_packing_from_sysfs);
hmp_packing_from_sysfs,
NULL,
0);
#endif
hmp_data.attr_group.name = "hmp";
hmp_data.attr_group.attrs = hmp_data.attributes;
@@ -4024,7 +4075,6 @@ static int hmp_attr_init(void)
return 0;
}
late_initcall(hmp_attr_init);
#endif /* CONFIG_HMP_VARIABLE_SCALE */
/*
* return the load of the lowest-loaded CPU in a given HMP domain
* min_cpu optionally points to an int to receive the CPU.
@@ -6915,6 +6965,69 @@ out_unlock:
return 0;
}
/*
* Move task in a runnable state to another CPU.
*
* Tailored on 'active_load_balance_stop_cpu' with slight
* modification to locking and pre-transfer checks. Note
* rq->lock must be held before calling.
*/
static void hmp_migrate_runnable_task(struct rq *rq)
{
struct sched_domain *sd;
int src_cpu = cpu_of(rq);
struct rq *src_rq = rq;
int dst_cpu = rq->push_cpu;
struct rq *dst_rq = cpu_rq(dst_cpu);
struct task_struct *p = rq->migrate_task;
/*
* One last check to make sure nobody else is playing
* with the source rq.
*/
if (src_rq->active_balance)
return;
if (src_rq->nr_running <= 1)
return;
if (task_rq(p) != src_rq)
return;
/*
* Not sure if this applies here but one can never
* be too cautious
*/
BUG_ON(src_rq == dst_rq);
double_lock_balance(src_rq, dst_rq);
rcu_read_lock();
for_each_domain(dst_cpu, sd) {
if (cpumask_test_cpu(src_cpu, sched_domain_span(sd)))
break;
}
if (likely(sd)) {
struct lb_env env = {
.sd = sd,
.dst_cpu = dst_cpu,
.dst_rq = dst_rq,
.src_cpu = src_cpu,
.src_rq = src_rq,
.idle = CPU_IDLE,
};
schedstat_inc(sd, alb_count);
if (move_specific_task(&env, p))
schedstat_inc(sd, alb_pushed);
else
schedstat_inc(sd, alb_failed);
}
rcu_read_unlock();
double_unlock_balance(src_rq, dst_rq);
}
static DEFINE_SPINLOCK(hmp_force_migration);
/*
@@ -6927,13 +7040,14 @@ static void hmp_force_up_migration(int this_cpu)
struct sched_entity *curr, *orig;
struct rq *target;
unsigned long flags;
unsigned int force;
unsigned int force, got_target;
struct task_struct *p;
if (!spin_trylock(&hmp_force_migration))
return;
for_each_online_cpu(cpu) {
force = 0;
got_target = 0;
target = cpu_rq(cpu);
raw_spin_lock_irqsave(&target->lock, flags);
curr = target->cfs.curr;
@@ -6956,15 +7070,14 @@ static void hmp_force_up_migration(int this_cpu)
if (hmp_up_migration(cpu, &target_cpu, curr)) {
if (!target->active_balance) {
get_task_struct(p);
target->active_balance = 1;
target->push_cpu = target_cpu;
target->migrate_task = p;
force = 1;
got_target = 1;
trace_sched_hmp_migrate(p, target->push_cpu, HMP_MIGRATE_FORCE);
hmp_next_up_delay(&p->se, target->push_cpu);
}
}
if (!force && !target->active_balance) {
if (!got_target && !target->active_balance) {
/*
* For now we just check the currently running task.
* Selecting the lightest task for offloading will
@@ -6975,14 +7088,29 @@ static void hmp_force_up_migration(int this_cpu)
target->push_cpu = hmp_offload_down(cpu, curr);
if (target->push_cpu < NR_CPUS) {
get_task_struct(p);
target->active_balance = 1;
target->migrate_task = p;
force = 1;
got_target = 1;
trace_sched_hmp_migrate(p, target->push_cpu, HMP_MIGRATE_OFFLOAD);
hmp_next_down_delay(&p->se, target->push_cpu);
}
}
/*
* We have a target with no active_balance. If the task
* is not currently running move it, otherwise let the
* CPU stopper take care of it.
*/
if (got_target && !target->active_balance) {
if (!task_running(target, p)) {
trace_sched_hmp_migrate_force_running(p, 0);
hmp_migrate_runnable_task(target);
} else {
target->active_balance = 1;
force = 1;
}
}
raw_spin_unlock_irqrestore(&target->lock, flags);
if (force)
stop_one_cpu_nowait(cpu_of(target),
hmp_active_task_migration_cpu_stop,
@@ -7002,7 +7130,7 @@ static unsigned int hmp_idle_pull(int this_cpu)
int cpu;
struct sched_entity *curr, *orig;
struct hmp_domain *hmp_domain = NULL;
struct rq *target, *rq;
struct rq *target = NULL, *rq;
unsigned long flags, ratio = 0;
unsigned int force = 0;
struct task_struct *p = NULL;
@@ -7054,14 +7182,25 @@ static unsigned int hmp_idle_pull(int this_cpu)
raw_spin_lock_irqsave(&target->lock, flags);
if (!target->active_balance && task_rq(p) == target) {
get_task_struct(p);
target->active_balance = 1;
target->push_cpu = this_cpu;
target->migrate_task = p;
force = 1;
trace_sched_hmp_migrate(p, target->push_cpu, HMP_MIGRATE_IDLE_PULL);
hmp_next_up_delay(&p->se, target->push_cpu);
/*
* if the task isn't running move it right away.
* Otherwise setup the active_balance mechanic and let
* the CPU stopper do its job.
*/
if (!task_running(target, p)) {
trace_sched_hmp_migrate_idle_running(p, 0);
hmp_migrate_runnable_task(target);
} else {
target->active_balance = 1;
force = 1;
}
}
raw_spin_unlock_irqrestore(&target->lock, flags);
if (force) {
stop_one_cpu_nowait(cpu_of(target),
hmp_idle_pull_cpu_stop,

5
kernel/trace/trace.c
View File

@@ -827,9 +827,12 @@ int trace_get_user(struct trace_parser *parser, const char __user *ubuf,
if (isspace(ch)) {
parser->buffer[parser->idx] = 0;
parser->cont = false;
} else {
} else if (parser->idx < parser->size - 1) {
parser->cont = true;
parser->buffer[parser->idx++] = ch;
} else {
ret = -EINVAL;
goto out;
}
*ppos += read;

2
kernel/trace/trace_event_perf.c
View File

@@ -26,7 +26,7 @@ static int perf_trace_event_perm(struct ftrace_event_call *tp_event,
{
/* The ftrace function trace is allowed only for root. */
if (ftrace_event_is_function(tp_event) &&
perf_paranoid_kernel() && !capable(CAP_SYS_ADMIN))
perf_paranoid_tracepoint_raw() && !capable(CAP_SYS_ADMIN))
return -EPERM;
/* No tracing, just counting, so no obvious leak */

4
mm/slub.c
View File

@@ -1201,8 +1201,8 @@ static unsigned long kmem_cache_flags(unsigned long object_size,
/*
* Enable debugging if selected on the kernel commandline.
*/
if (slub_debug && (!slub_debug_slabs ||
!strncmp(slub_debug_slabs, name, strlen(slub_debug_slabs))))
if (slub_debug && (!slub_debug_slabs || (name &&
!strncmp(slub_debug_slabs, name, strlen(slub_debug_slabs)))))
flags |= slub_debug;
return flags;

5
net/batman-adv/main.c
View File

@@ -61,6 +61,7 @@ static int __init batadv_init(void)
batadv_recv_handler_init();
batadv_iv_init();
batadv_nc_init();
batadv_event_workqueue = create_singlethread_workqueue("bat_events");
@@ -138,7 +139,7 @@ int batadv_mesh_init(struct net_device *soft_iface)
if (ret < 0)
goto err;
ret = batadv_nc_init(bat_priv);
ret = batadv_nc_mesh_init(bat_priv);
if (ret < 0)
goto err;
@@ -163,7 +164,7 @@ void batadv_mesh_free(struct net_device *soft_iface)
batadv_vis_quit(bat_priv);
batadv_gw_node_purge(bat_priv);
batadv_nc_free(bat_priv);
batadv_nc_mesh_free(bat_priv);
batadv_dat_free(bat_priv);
batadv_bla_free(bat_priv);

28
net/batman-adv/network-coding.c
View File

@@ -34,6 +34,20 @@ static void batadv_nc_worker(struct work_struct *work);
static int batadv_nc_recv_coded_packet(struct sk_buff *skb,
struct batadv_hard_iface *recv_if);
/**
* batadv_nc_init - one-time initialization for network coding
*/
int __init batadv_nc_init(void)
{
int ret;
/* Register our packet type */
ret = batadv_recv_handler_register(BATADV_CODED,
batadv_nc_recv_coded_packet);
return ret;
}
/**
* batadv_nc_start_timer - initialise the nc periodic worker
* @bat_priv: the bat priv with all the soft interface information
@@ -45,10 +59,10 @@ static void batadv_nc_start_timer(struct batadv_priv *bat_priv)
}
/**
* batadv_nc_init - initialise coding hash table and start house keeping
* batadv_nc_mesh_init - initialise coding hash table and start house keeping
* @bat_priv: the bat priv with all the soft interface information
*/
int batadv_nc_init(struct batadv_priv *bat_priv)
int batadv_nc_mesh_init(struct batadv_priv *bat_priv)
{
bat_priv->nc.timestamp_fwd_flush = jiffies;
bat_priv->nc.timestamp_sniffed_purge = jiffies;
@@ -70,11 +84,6 @@ int batadv_nc_init(struct batadv_priv *bat_priv)
batadv_hash_set_lock_class(bat_priv->nc.coding_hash,
&batadv_nc_decoding_hash_lock_class_key);
/* Register our packet type */
if (batadv_recv_handler_register(BATADV_CODED,
batadv_nc_recv_coded_packet) < 0)
goto err;
INIT_DELAYED_WORK(&bat_priv->nc.work, batadv_nc_worker);
batadv_nc_start_timer(bat_priv);
@@ -1722,12 +1731,11 @@ free_nc_packet:
}
/**
* batadv_nc_free - clean up network coding memory
* batadv_nc_mesh_free - clean up network coding memory
* @bat_priv: the bat priv with all the soft interface information
*/
void batadv_nc_free(struct batadv_priv *bat_priv)
void batadv_nc_mesh_free(struct batadv_priv *bat_priv)
{
batadv_recv_handler_unregister(BATADV_CODED);
cancel_delayed_work_sync(&bat_priv->nc.work);
batadv_nc_purge_paths(bat_priv, bat_priv->nc.coding_hash, NULL);

14
net/batman-adv/network-coding.h
View File

@@ -22,8 +22,9 @@
#ifdef CONFIG_BATMAN_ADV_NC
int batadv_nc_init(struct batadv_priv *bat_priv);
void batadv_nc_free(struct batadv_priv *bat_priv);
int batadv_nc_init(void);
int batadv_nc_mesh_init(struct batadv_priv *bat_priv);
void batadv_nc_mesh_free(struct batadv_priv *bat_priv);
void batadv_nc_update_nc_node(struct batadv_priv *bat_priv,
struct batadv_orig_node *orig_node,
struct batadv_orig_node *orig_neigh_node,
@@ -47,12 +48,17 @@ int batadv_nc_init_debugfs(struct batadv_priv *bat_priv);
#else /* ifdef CONFIG_BATMAN_ADV_NC */
static inline int batadv_nc_init(struct batadv_priv *bat_priv)
static inline int batadv_nc_init(void)
{
return 0;
}
static inline void batadv_nc_free(struct batadv_priv *bat_priv)
static inline int batadv_nc_mesh_init(struct batadv_priv *bat_priv)
{
return 0;
}
static inline void batadv_nc_mesh_free(struct batadv_priv *bat_priv)
{
return;
}

2
net/core/flow_dissector.c
View File

@@ -40,7 +40,7 @@ again:
struct iphdr _iph;
ip:
iph = skb_header_pointer(skb, nhoff, sizeof(_iph), &_iph);
if (!iph)
if (!iph || iph->ihl < 5)
return false;
if (ip_is_fragment(iph))

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