With certain restrictions it is possible for a wakeup device to share
an IRQ with an IRQF_NO_SUSPEND user, and the warnings introduced by
commit cab303be91 are spurious. The new
IRQF_COND_SUSPEND flag allows drivers to tell the core when these
restrictions are met, allowing spurious warnings to be silenced.
This patch documents how IRQF_COND_SUSPEND is expected to be used,
updating some of the text now made invalid by its addition.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
The IRQ line connected to the DBGU UART is often shared with a timer device
which request the IRQ with IRQF_NO_SUSPEND.
Since the UART driver is correctly disabling IRQs when entering suspend
we can safely request the IRQ with IRQF_COND_SUSPEND so that irq core
will not complain about mixing IRQF_NO_SUSPEND and !IRQF_NO_SUSPEND.
Rework the interrupt handler to wake the system up when an interrupt
happens on the DEBUG_UART while the system is suspended.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Reviewed-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
The watchdog interrupt (only used when activating software watchdog)
shouldn't be suspended when entering suspend mode, because it is shared
with a timer device (which request the line with IRQF_NO_SUSPEND) and once
the watchdog "Mode Register" has been written, it cannot be changed (which
means we cannot disable the watchdog interrupt when entering suspend).
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Reviewed-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
* suspend-to-idle:
cpuidle / sleep: Use broadcast timer for states that stop local timer
cpuidle: Clean up fallback handling in cpuidle_idle_call()
cpuidle / sleep: Do sanity checks in cpuidle_enter_freeze() too
idle / sleep: Avoid excessive disabling and enabling interrupts
* acpi-resources:
x86/PCI/ACPI: Relax ACPI resource descriptor checks to work around BIOS bugs
x86/PCI/ACPI: Ignore resources consumed by host bridge itself
PCI: versatile: Update for list_for_each_entry() API change
Commit 3810631332 (PM / sleep: Re-implement suspend-to-idle handling)
overlooked the fact that entering some sufficiently deep idle states
by CPUs may cause their local timers to stop and in those cases it
is necessary to switch over to a broadcast timer prior to entering
the idle state. If the cpuidle driver in use does not provide
the new ->enter_freeze callback for any of the idle states, that
problem affects suspend-to-idle too, but it is not taken into account
after the changes made by commit 3810631332.
Fix that by changing the definition of cpuidle_enter_freeze() and
re-arranging of the code in cpuidle_idle_call(), so the former does
not call cpuidle_enter() any more and the fallback case is handled
by cpuidle_idle_call() directly.
Fixes: 3810631332 (PM / sleep: Re-implement suspend-to-idle handling)
Reported-and-tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Commit de7b5b3d79 ("net: eth: xgene: change APM X-Gene SoC platform
ethernet to support ACPI") breaks booting with devicetree with UEFI
firmware. In that case, I get:
Unhandled fault: synchronous external abort (0x96000010) at 0xfffffc0000620010
Internal error: : 96000010 [#1] SMP
Modules linked in: vfat fat xfs libcrc32c ahci_xgene libahci_platform libahci
CPU: 7 PID: 634 Comm: NetworkManager Not tainted 4.0.0-rc1+ #4
Hardware name: AppliedMicro Mustang/Mustang, BIOS 1.1.0-rh-0.14 Mar 1 2015
task: fffffe03d4c7e100 ti: fffffe03d4e24000 task.ti: fffffe03d4e24000
PC is at xgene_enet_rd_mcx_mac.isra.11+0x58/0xd4
LR is at xgene_gmac_tx_enable+0x2c/0x50
pc : [<fffffe000069d6fc>] lr : [<fffffe000069dcc4>] pstate: 80000145
sp : fffffe03d4e27590
x29: fffffe03d4e27590 x28: 0000000000000000
x27: fffffe03d4e277c0 x26: fffffe03da8fda10
x25: fffffe03d4e2760c x24: fffffe03d49e28c0
x23: fffffc0000620004 x22: 0000000000000000
x21: fffffc0000620000 x20: fffffc0000620010
x19: 000000000000000b x18: 000003ffd4a96020
x17: 000003ff7fc1f7a0 x16: fffffe000079b9cc
x15: 0000000000000000 x14: 0000000000000000
x13: 0000000000000000 x12: fffffe03d4e24000
x11: fffffe03d4e27da0 x10: 0000000000000001
x9 : 0000000000000000 x8 : fffffe03d4e27a20
x7 : 0000000000000000 x6 : 00000000ffffffef
x5 : fffffe000105f7d0 x4 : fffffe00007ca8c8
x3 : fffffe03d4e2760c x2 : 0000000000000000
x1 : fffffc0000620000 x0 : 0000000040000000
Process NetworkManager (pid: 634, stack limit = 0xfffffe03d4e24028)
Stack: (0xfffffe03d4e27590 to 0xfffffe03d4e28000)
...
Call trace:
[<fffffe000069d6fc>] xgene_enet_rd_mcx_mac.isra.11+0x58/0xd4
[<fffffe000069dcc0>] xgene_gmac_tx_enable+0x28/0x50
[<fffffe00006a112c>] xgene_enet_open+0x2c/0x130
[<fffffe00007b9254>] __dev_open+0xc8/0x148
[<fffffe00007b956c>] __dev_change_flags+0x90/0x158
[<fffffe00007b9664>] dev_change_flags+0x30/0x70
[<fffffe00007c8ab8>] do_setlink+0x278/0x870
[<fffffe00007c95bc>] rtnl_newlink+0x404/0x6a8
[<fffffe00007c8040>] rtnetlink_rcv_msg+0x98/0x218
[<fffffe00007e78e4>] netlink_rcv_skb+0xe0/0xf8
[<fffffe00007c7f94>] rtnetlink_rcv+0x30/0x44
[<fffffe00007e6f2c>] netlink_unicast+0xfc/0x210
[<fffffe00007e75b8>] netlink_sendmsg+0x498/0x5ac
[<fffffe00007990b8>] do_sock_sendmsg+0xa4/0xcc
[<fffffe000079a958>] ___sys_sendmsg+0x1fc/0x208
[<fffffe000079b984>] __sys_sendmsg+0x4c/0x94
[<fffffe000079b9f8>] SyS_sendmsg+0x2c/0x3c
The problem here is that the enet hw clocks are not getting
initialized because of a test to avoid the initialization if
UEFI is used to boot. This is an incorrect test. When booting
with UEFI and devicetree, the kernel must still initialize
the enet hw clocks. If booting with ACPI, the clock hw is
not exposed to the kernel and it is that case where we want
to avoid initializing clocks.
Signed-off-by: Mark Salter <msalter@redhat.com>
Acked-by: Feng Kan <fkan@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
EEH recovery for bnx2x based adapters is not reliable on all Power
systems using the default hot reset, which can result in an
unrecoverable EEH error. Forcing the use of fundamental reset
during EEH recovery fixes this.
Cc: stable<stable@vger.kernel.org>
Signed-off-by: Brian King <brking@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David Vrabel says:
====================
xen-netback: fix ethtool stats and memory leak
A couple of bug fixes for netback:
- make ethool stats to report the correct values.
- don't leak 1 MiB every time a VIF is destroyed.
Changes in v2:
- Split 2nd patch into leak fix and refactor patches
====================
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When handling a from-guest frag list, xenvif_handle_frag_list()
replaces the frags before calling the destructor to clean up the
original (foreign) frags. Whilst this is safe (the destructor doesn't
actually use the frags), it looks odd.
Reorder the function to be less confusing.
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Every time a VIF is destroyed up to 256 pages may be leaked if packets
with more than MAX_SKB_FRAGS frags were transmitted from the guest.
Even worse, if another user of ballooned pages allocated one of these
ballooned pages it would not handle the unexpectedly >1 page count
(e.g., gntdev would deadlock when unmapping a grant because the page
count would never reach 1).
When handling a from-guest skb with a frag list, unref the frags
before releasing them so they are freed correctly when the VIF is
destroyed.
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Use correct pointer arithmetic to get the pointer to each stat.
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Pull x86 fixes from Ingo Molnar:
"Misc fixes: EFI fixes, an Intel Quark fix, an asm fix and an FPU
handling fix"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/fpu/xsaves: Fix improper uses of __ex_table
x86/intel/quark: Select COMMON_CLK
x86/asm/entry/64: Remove a bogus 'ret_from_fork' optimization
firmware: dmi_scan: Fix dmi_len type
efi/libstub: Fix boundary checking in efi_high_alloc()
firmware: dmi_scan: Fix dmi scan to handle "End of Table" structure
When annotating source/disasm lines the perf tools parse the output of
objdump, trying to provide augmented output that allows navigating
jumps, calls, etc.
But when a line output by objdump can't be parsed the annotation code
falls back to just presenting the unparsed line.
When fixing a leak in the 0fb9f2aab7 commit ("perf annotate: Fix
memory leaks in LOCK handling") we failed to take that into account and
instead tried to free one of the data structures that should be freed
only when successfully allocated, oops, segfault.
There was a change in the way the objdump output for lock prefixed
instructions is formatted that lead the relevant parser to fail to grok
it.
At least RHEL7 works ok, but Fedora 20 segfaults.
Fix it by making the ins__delete() destructor work like the most basic
destructor: free().
Namely make it accept a NULL pointer and when handling it just do
nothing.
Further investigation is needed to figure out the nature of the objdump
output change so as to make the parser grok it.
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Rabin Vincent <rabin@rab.in>
Link: http://lkml.kernel.org/n/tip-7wsy0zo292pif0yjoqpfryrz@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
KVM: s390: Fixups for changes in merge window for 4.0
Here are some fixups/improvements for
commit 658b6eda20 ("KVM: s390: add cpu model support")
commit 9d8d578605 ("KVM: s390: use facilities and cpu_id per KVM")
commit a374e892c3 ("KVM: s390/cpacf: Enable/disable protected key
functions for kvm guest")
commit 45c9b47c58 ("KVM: s390/CPACF: Choose crypto control block format")
which all have been merged during the merge window for 4.0.
Commit:
f31a9f7c71 ("x86/xsaves: Use xsaves/xrstors to save and restore xsave area")
introduced alternative instructions for XSAVES/XRSTORS and commit:
adb9d526e9 ("x86/xsaves: Add xsaves and xrstors support for booting time")
added support for the XSAVES/XRSTORS instructions at boot time.
Unfortunately both failed to properly protect them against faulting:
The 'xstate_fault' macro will use the closest label named '1'
backward and that ends up in the .altinstr_replacement section
rather than in .text. This means that the kernel will never find
in the __ex_table the .text address where this instruction might
fault, leading to serious problems if userspace manages to
trigger the fault.
Signed-off-by: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Signed-off-by: Jamie Iles <jamie.iles@oracle.com>
[ Improved the changelog, fixed some whitespace noise. ]
Acked-by: Borislav Petkov <bp@alien8.de>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: <stable@vger.kernel.org>
Cc: Allan Xavier <mr.a.xavier@gmail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: adb9d526e9 ("x86/xsaves: Add xsaves and xrstors support for booting time")
Fixes: f31a9f7c71 ("x86/xsaves: Use xsaves/xrstors to save and restore xsave area")
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Pull clockevents fixes from Daniel Lezcano:
" These two patches fix a potential crash at boot time.
- Fix setup_irq / clockevents_config_and_register init ordering in order to
prevent to have an interrupt to be fired before the handler is set for sun5i
and efm32. (Yongbae Park)"
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Fix the dmaengine complaint about missing slave caps :
- declare the available bus widths
- declare the available transfer types
- declare the residue calculation type
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Avoid the warning below triggered during dmaengine async device
registration.
WARNING: CPU: 1 PID: 1 at linux/drivers/dma/dmaengine.c:863
dma_async_device_register+0x2a8/0x4b8()
this driver doesn't support generic slave capabilities reporting
To do that fill mandatory .directions bit mask,
.src/dst_addr_widths and .residue_granularity dma_device fields
with appropriate values.
Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Johan writes:
USB-serial fixes for v4.0-rc3
Here are a few fixes for reported problems including a usb-debug device
buffer overflow, potential use-after-free on failed probe, and a couple
of issues with the USB console.
Some new device IDs are also added.
Signed-off-by: Johan Hovold <johan@kernel.org>
The interrupt is enabled before the handler is set. Even this bug
did not appear, it is potentially dangerous as it can lead to a
NULL pointer dereference.
Fix the error by enabling the interrupt after
clockevents_config_and_register() is called.
Cc: stable@vger.kernel.org
Signed-off-by: Yongbae Park <yongbae2@gmail.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
The initialisation of the efm32 clocksource first sets up the irq and only
after that initialises the data needed for irq handling. In case this
initialisation is delayed the irq handler would dereference a NULL pointer.
I'm not aware of anything that could delay the process in such a way, but it's
better to be safe than sorry, so setup the irq only when the clock event device
is ready.
Cc: stable@vger.kernel.org
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Yongbae Park <yongbae2@gmail.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
cancel[_delayed]_work_sync() are implemented using
__cancel_work_timer() which grabs the PENDING bit using
try_to_grab_pending() and then flushes the work item with PENDING set
to prevent the on-going execution of the work item from requeueing
itself.
try_to_grab_pending() can always grab PENDING bit without blocking
except when someone else is doing the above flushing during
cancelation. In that case, try_to_grab_pending() returns -ENOENT. In
this case, __cancel_work_timer() currently invokes flush_work(). The
assumption is that the completion of the work item is what the other
canceling task would be waiting for too and thus waiting for the same
condition and retrying should allow forward progress without excessive
busy looping
Unfortunately, this doesn't work if preemption is disabled or the
latter task has real time priority. Let's say task A just got woken
up from flush_work() by the completion of the target work item. If,
before task A starts executing, task B gets scheduled and invokes
__cancel_work_timer() on the same work item, its try_to_grab_pending()
will return -ENOENT as the work item is still being canceled by task A
and flush_work() will also immediately return false as the work item
is no longer executing. This puts task B in a busy loop possibly
preventing task A from executing and clearing the canceling state on
the work item leading to a hang.
task A task B worker
executing work
__cancel_work_timer()
try_to_grab_pending()
set work CANCELING
flush_work()
block for work completion
completion, wakes up A
__cancel_work_timer()
while (forever) {
try_to_grab_pending()
-ENOENT as work is being canceled
flush_work()
false as work is no longer executing
}
This patch removes the possible hang by updating __cancel_work_timer()
to explicitly wait for clearing of CANCELING rather than invoking
flush_work() after try_to_grab_pending() fails with -ENOENT.
Link: http://lkml.kernel.org/g/20150206171156.GA8942@axis.com
v3: bit_waitqueue() can't be used for work items defined in vmalloc
area. Switched to custom wake function which matches the target
work item and exclusive wait and wakeup.
v2: v1 used wake_up() on bit_waitqueue() which leads to NULL deref if
the target bit waitqueue has wait_bit_queue's on it. Use
DEFINE_WAIT_BIT() and __wake_up_bit() instead. Reported by Tomeu
Vizoso.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Rabin Vincent <rabin.vincent@axis.com>
Cc: Tomeu Vizoso <tomeu.vizoso@gmail.com>
Cc: stable@vger.kernel.org
Tested-by: Jesper Nilsson <jesper.nilsson@axis.com>
Tested-by: Rabin Vincent <rabin.vincent@axis.com>
According to i.MX6 Series Reference Manual, the formula to calculate
the sys clock is
sysclk rate = bclk rate * (div2 + 1) * (7 * psr + 1) * (pm + 1) * 2
Commit aafa85e71a ("ASoC: fsl_ssi: Add DAI master mode support for
SSI on i.MX series") added the divisor calculation which relies on
the clk_round_rate(). However, at that time, clk_round_rate() didn't
provide closest clock rates for some cases because it might not use
a correct rounding policy. So using the original formula (pm + 1) for
PM divisor was not able to give us a desired clock rate. And then we
used (pm + 2) to do the trick.
However, the clk-divider driver has been refined a lot since commit
b11d282dbe ("clk: divider: fix rate calculation for fractional rates")
Now using (pm + 2) trick would result an incorrect clock rate.
So this patch fixes the problem by removing the useless trick.
Reported-by: Stephane Cerveau <scerveau@voxtok.com>
Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The commit below introduced an unsafe dereference of
mvmvif->phy_ctxt. It can be NULL even if we hold the mutex.
We can be handling a BT Coex notification while the vif has
already been unassigned. This can happen since the BT Coex
notification is hanled asynchronuously: we can have started
to handle the BT Coex notification trying to acquire the
mutex while the unassign flow already got it. The BT Coex
notification handling will wait for the mutext. I'll get it
later, but then mvmvif->phy_ctxt will be NULL.
Panic log:
BUG: unable to handle kernel NULL pointer dereference at (null)
IP: [<f985180d>] iwl_mvm_bt_notif_iterator+0x9d/0x340 [iwlmvm]
*pdpt = 0000000000000000 *pde = f000eef300000007
Oops: 0000 [#1] SMP
Workqueue: events iwl_mvm_async_handlers_wk [iwlmvm]
task: ed719b20 ti: ec03e000 task.ti: ec03e000
EIP: 0060:[<f985180d>] EFLAGS: 00010202 CPU: 2
EIP is at iwl_mvm_bt_notif_iterator+0x9d/0x340 [iwlmvm]
EAX: 00000000 EBX: f6d3cb70 ECX: f6d3cb70 EDX: 00000000
ESI: ec03fe40 EDI: efeb8810 EBP: ec03fdf0 ESP: ec03fdac
DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
CR0: 80050033 CR2: 00000000 CR3: 01a1a000 CR4: 001407f0
Stack:
f743ca80 f744a404 ec03fdcc c10e3952 00003aba f743ca80 00000246 f743ca80
00000246 00000000 00000001 00000000 ebd45ff6 ebd458a4 f6d3c500 ebd45578
ebd44b01 ec03fe18 f99e1bc2 00000002 ebd44bc0 f9851770 00000000 f6d3c500
Call Trace:
[<c10e3952>] ? ring_buffer_unlock_commit+0xa2/0xd0
[<f99e1bc2>] __iterate_interfaces+0x82/0x110 [mac80211]
[<f9851770>] ? iwl_mvm_bt_coex_reduced_txp+0x140/0x140 [iwlmvm]
[<f99e1c6a>] ieee80211_iterate_active_interfaces_atomic+0x1a/0x20 [mac80211]
[<f9851427>] iwl_mvm_bt_coex_notif_handle+0x77/0x280 [iwlmvm]
[<f9852161>] iwl_mvm_rx_bt_coex_notif_old+0x211/0x220 [iwlmvm]
[<f9850b8b>] iwl_mvm_rx_bt_coex_notif+0x19b/0x1b0 [iwlmvm]
[<f983944f>] iwl_mvm_async_handlers_wk+0x7f/0xe0 [iwlmvm]
CC: <stable@vger.kernel.org> [3.19+]
Fixes: 123f515635 ("iwlwifi: mvm: BT Coex - add support for TTC / RRC")
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
The usages of clamp() macro in sound/usb/line6/playback.c are just
wrong, the low and high values are swapped.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
lcdck takes mck (not smd) as its parent. It is also assigned id 3 and not 4.
Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
[nicolas.ferre@atmel.com: squashed 2 related patches]
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Since commit 98686d9a52 ("gpio: mpc8xxx: Convert to platform device
interface"), we get the following section mismatch warning. Remove the
__initdata annotation to fix it.
WARNING: vmlinux.o(.data+0xbc28): Section mismatch in reference from the variable mpc8xxx_plat_driver to the variable .init.data:mpc8xxx_gpio_ids
The variable mpc8xxx_plat_driver references
the variable __initdata mpc8xxx_gpio_ids
If the reference is valid then annotate the
variable with __init* or __refdata (see linux/init.h) or name the variable:
*_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console
Signed-off-by: Kevin Hao <haokexin@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This reverts commit 5a7d2efdd9.
As per discussion on the mailing list, this is not the right
thing to do. NULL cookies are valid in the stubs.
Reported-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
When simplificating the channel configuration, the cyclic case has been
forgotten. It leads to use bad configuration causing many bugs.
Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
When dma controller is not used by any user and set off,
we should disble interrupt handler, at least the interrupt
reset part, for some subsystem, e.g. ADSP, may use the
dma in its own logic, here reset the interrupt may make
this subsystem work abnormally.
Signed-off-by: Jie Yang <yang.jie@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Default attributes are created when the device is registered. Attributes
created after device registration can lead to race conditions, where user space
(e.g. udev) sees the device but not the attributes.
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
When thermal zone device register fails or on module exit, the memory
for aux_trip is not freed. This change fixes this issue.
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
In seq_buf_bprintf(), bstr_printf() is used to copy the format into the
buffer remaining in the seq_buf structure. The return of bstr_printf()
is the amount of characters written to the buffer excluding the '\0',
unless the line was truncated!
If the line copied does not fit, it is truncated, and a '\0' is added
to the end of the buffer. But in this case, '\0' is included in the length
of the line written. To know if the buffer had overflowed, the return
length will be the same or greater than the length of the buffer passed in.
The check in seq_buf_bprintf() only checked if the length returned from
bstr_printf() would fit in the buffer, as the seq_buf_bprintf() is only
to be an all or nothing command. It either writes all the string into
the seq_buf, or none of it. If the string is truncated, the pointers
inside the seq_buf must be reset to what they were when the function was
called. This is not the case. On overflow, it copies only part of the string.
The fix is to change the overflow check to see if the length returned from
bstr_printf() is less than the length remaining in the seq_buf buffer, and not
if it is less than or equal to as it currently does. Then seq_buf_bprintf()
will know if the write from bstr_printf() was truncated or not.
Link: http://lkml.kernel.org/r/1425500481.2712.27.camel@perches.com
Cc: stable@vger.kernel.org
Reported-by: Joe Perches <joe@perches.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
I recently did a rework of the smc91x driver and did some build-testing
by compiling hundreds of randconfig kernels. Unfortunately, my script
was wrong and did not actually test the configurations that mattered,
so I introduced stupid typos in almost every file I touched.
I fixed my script now, built all configurations that actually matter
and fixed all the typos, this is the result.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: b70661c708 ("net: smc91x: use run-time configuration on all ARM machines")
Signed-off-by: David S. Miller <davem@davemloft.net>
when multiport is off, virtio console invokes config access from irq
context, config access is blocking on s390.
Fix this up by scheduling work from config irq - similar to what we do
for multiport configs.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: stable@kernel.org
