This driver has no business including <linux/gpio.h>, it is a
driver so include <linux/gpio/driver.h>.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This is a GPIO driver so it should definately include
<linux/gpio/driver.h>. We want to get rid of <linux/of_gpio.h>
but that will take a bit longer.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This driver has no business including <linux/gpio.h>, it is a
driver so include <linux/gpio/driver.h>.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This driver has no business including <linux/gpio.h>, it is a
driver so include <linux/gpio/driver.h>.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This driver has no business including <linux/gpio.h> or
<linux/of_gpio.h>. Cut them and include <linux/gpio/driver.h>
and <linux/gpio/consumer.h> which is it they really needs.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
At least some JMicron controllers issue buggy oversized DMA reads when
fetching context descriptors, always fetching 0x20 bytes at once for
descriptors which are only 0x10 bytes long. This is often harmless, but
can cause page faults on modern systems with IOMMUs:
DMAR: [DMA Read] Request device [05:00.0] fault addr fff56000 [fault reason 06] PTE Read access is not set
firewire_ohci 0000:05:00.0: DMA context IT0 has stopped, error code: evt_descriptor_read
This works around the problem by always leaving 0x10 padding bytes at
the end of descriptor buffer pages, which should be harmless to do
unconditionally for controllers in case others have the same behavior.
Signed-off-by: Hector Martin <marcan@marcan.st>
Reviewed-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
The latest max_mtu patch missed that datagram_size is actually one less
than the datagram's Total Length.
Fixes: 357f4aae85 ("firewire: net: really fix maximum possible MTU")
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Johan writes:
USB-serial updates for v4.16-rc1
Here are the USB-serial updates for 4.16-rc1, including:
- a fix for a potential sleep-while-atomic (warning) in an io_edgeport
error path
- removal of a dummy TIOCSSERIAL implementation in ark3116
- new features for Fintek F81532/534 devices:
- support for higher baud rates (up to 1.5 Mbps)
- support for auto-RTS (for RS-485)
- support for transceiver configuration
- support for detecting disabled ports
Included are also various clean ups.
All have been (at least compile tested) in linux-next without any
reported issues.
Signed-off-by: Johan Hovold <johan@kernel.org>
When exposing data access through debugfs, the correct
debugfs_create_*() functions must be used, depending on data type.
Remove all casts from data pointers passed to debugfs_create_*()
functions, as such casts prevent the compiler from flagging bugs.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
In commit 72d1465789 ("uio_hv_generic: fix type mismatch warnings"),
I addressed some warnings that show up with CONFIG_X86_PAE, now a new
change has added more of the same:
drivers/uio/uio_hv_generic.c: In function 'hv_uio_probe':
drivers/uio/uio_hv_generic.c:205:5: error: cast from pointer to integer of different size [-Werror=pointer-to-int-cast]
drivers/uio/uio_hv_generic.c:225:5: error: cast from pointer to integer of different size [-Werror=pointer-to-int-cast]
The fix is the same as before, casting to uintptr_t as an intermediate.
Fixes: e7d214642a ("uio_hv_generic: create send and receive buffers")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
There are resources that are not dealocated on failure path
in int3400_thermal_probe().
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
When a CPU enters an idle lower-power state or is powering off, we
need to mask SDE events so that no events can be delivered while we
are messing with the MMU as the registered entry points won't be valid.
If the system reboots, we want to unregister all events and mask the CPUs.
For kexec this allows us to hand a clean slate to the next kernel
instead of relying on it to call sdei_{private,system}_data_reset().
For hibernate we unregister all events and re-register them on restore,
in case we restored with the SDE code loaded at a different address.
(e.g. KASLR).
Add all the notifiers necessary to do this. We only support shared events
so all events are left registered and enabled over CPU hotplug.
Reviewed-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: James Morse <james.morse@arm.com>
[catalin.marinas@arm.com: added CPU_PM_ENTER_FAILED case]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
The Software Delegated Exception Interface (SDEI) is an ARM standard
for registering callbacks from the platform firmware into the OS.
This is typically used to implement firmware notifications (such as
firmware-first RAS) or promote an IRQ that has been promoted to a
firmware-assisted NMI.
Add the code for detecting the SDEI version and the framework for
registering and unregistering events. Subsequent patches will add the
arch-specific backend code and the necessary power management hooks.
Only shared events are supported, power management, private events and
discovery for ACPI systems will be added by later patches.
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Fix to return error code -ENOMEM from the kzalloc() error handling
case instead of 0, as done elsewhere in this function.
Fixes: 80eb876 ("tcmu: allow max block and global max blocks to be settable")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Acked-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
HiSilicon Hip06/Hip07 can operate as either a Root Port or an Endpoint. It
always advertises an MSI capability, but it can only generate MSIs when in
Endpoint mode.
The device has the same Vendor and Device IDs in both modes, so check the
Class Code and disable MSI only when operating as a Root Port.
[bhelgaas: changelog]
Fixes: 72f2ff0deb ("PCI: Disable MSI for HiSilicon Hip06/Hip07 Root Ports")
Signed-off-by: Dongdong Liu <liudongdong3@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Zhou Wang <wangzhou1@hisilicon.com>
Cc: stable@vger.kernel.org # v4.11+
Log cmd id that was not found in the tcmu_handle_completions
lookup failure path.
Signed-off-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Add SAM_STAT_BUSY sense_reason. The next patch will have
target_core_user return this value while it is temporarily
blocked and restarting.
Signed-off-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
We will always have a page mapped for cmd data if it is
valid command. If the mapping does not exist then something
bad happened in userspace and it should not proceed. This
has us return VM_FAULT_SIGBUS when this happens instead of
returning a freshly allocated paged. The latter can cause
corruption because userspace might write the pages data
overwriting valid data or return it to the initiator.
Signed-off-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
If a length of a range is zero, it means there is nothing to unmap
and we can skip this range.
Here is one more reason, why we have to skip such ranges. An unmap
callback calls file_operations->fallocate(), but the man page for the
fallocate syscall says that fallocate(fd, mode, offset, let) returns
EINVAL, if len is zero. It means that file_operations->fallocate() isn't
obligated to handle zero ranges too.
Signed-off-by: Andrei Vagin <avagin@openvz.org>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
If chap_server_compute_md5() fails early, e.g. via CHAP_N mismatch, then
crypto_free_shash() is called with a NULL pointer which gets
dereferenced in crypto_shash_tfm().
Fixes: 69110e3ced ("iscsi-target: Use shash and ahash")
Suggested-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: David Disseldorp <ddiss@suse.de>
Cc: stable@vger.kernel.org # 4.6+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
If nud_state is not valid then call neigh_event_send() to update MAC
address.
Signed-off-by: Varun Prakash <varun@chelsio.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
The script "checkpatch.pl" pointed information out like the following.
WARNING: Prefer seq_puts to seq_printf
Thus fix the affected source code place.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
The script "checkpatch.pl" pointed information out like the following.
WARNING: void function return statements are not generally useful
Thus remove such a statement in the affected function.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
The variables "se_cmd" and "tl_cmd" will eventually be set to appropriate
pointers a bit later.
Thus omit the explicit initialisation at the beginning.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
The script "checkpatch.pl" pointed information out like the following.
WARNING: quoted string split across lines
Thus fix the affected source code places.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Replace the specification of data structures by pointer dereferences
as the parameter for the operator "sizeof" to make the corresponding size
determination a bit safer according to the Linux coding style convention.
This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Omit an extra message for a memory allocation failure in these functions.
This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Omit an extra message for a memory allocation failure in these functions.
This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Acked-by: Chris Boot <bootc@boo.tc>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Users might have a physical system to a target so they could
have a lot more than 2 gigs of memory they want to devote to
tcmu. OTOH, we could be running in a vm and so a 2 gig
global and 1 gig per dev limit might be too high. This patch
allows the user to specify the limits.
Signed-off-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This adds a timer, qfull_time_out, that controls how long a
device will wait for ring buffer space to open before
failing the commands in the queue. It is useful to separate
this timer from the cmd_time_out and default 30 sec one,
because for HA setups cmd_time_out may be disbled and 30
seconds is too long to wait when some OSs like ESX will
timeout commands after as little as 8 - 15 seconds.
Signed-off-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This patch has tcmu internally queue cmds if its ring buffer
is full. It also makes the TCMU_GLOBAL_MAX_BLOCKS limit a
hint instead of a hard limit, so we do not have to add any
new locks/atomics in the main IO path except when IO is not
running.
This fixes the following bugs:
1. We cannot sleep from the submitting context because it might be
called from a target recv context. This results in transport level
commands timing out. For example if the ring is full, we would
sleep, and a iscsi initiator would send a iscsi ping/nop which
times out because the target's recv thread is sleeping here.
2. Devices were not fairly scheduled to run when they hit the global
limit so they could time out waiting for ring space while others
got run.
Signed-off-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
We do not really save a lot by trying to increase thresh
a multiple of the existing value. This just simplifies the
code by increasing it to whatever is needed for the command
being executed.
Signed-off-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
In the next patches we will call queue_cmd_ring from the submitting
context and also the completion path. This changes the queue_cmd_ring
return code so in the next patches we can return a sense_reason_t
and also signal if a command was requeued.
Signed-off-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
The blocks_left calculation does not account for free blocks
between 0 and thresh, so we could be queueing/waiting when
there are enough blocks free.
This has us add in the blocks between 0 and thresh as well as
at the end from thresh to DATA_BLOCK_BITS.
Signed-off-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
scatter_data_area always returns 0, so stop checking
for errors.
Signed-off-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
If we cannot setup a cmd because we run out of ring space
or global pages release the blocks before sleeping. This
prevents a deadlock where dev0 has waiting_blocks set and
needs N blocks, but dev1 to devX have each allocated N / X blocks
and also hit the global block limit so they went to sleep.
find_free_blocks is not able to take the sleeping dev's
blocks becaause their waiting_blocks is set and even
if it was not the block returned by find_last_bit could equal
dbi_max. The latter will probably never happen because
DATA_BLOCK_BITS is so high but in the next patches
DATA_BLOCK_BITS and TCMU_GLOBAL_MAX_BLOCKS will be settable so
it might be lower and could happen.
Signed-off-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
No need for the commands_lock. The cmdr_lock is already held during
idr addition and deletion, so just grab it during traversal.
Note: This also fixes a issue where we should have been using at
least _bh locking in tcmu_handle_completions when taking the commands
lock to prevent the case where tcmu_handle_completions could be
interrupted by a timer softirq while the commands_lock is held.
Signed-off-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This moves the expired command completion handling to
the unmap wq, so the next patch can use a mutex
in tcmu_check_expired_cmd.
Note:
tcmu_device_timedout's use of spin_lock_irq was not needed.
The commands_lock is used between thread context (tcmu_queue_cmd_ring
and tcmu_irqcontrol (even though this is named irqcontrol it is not
run in irq context)) and timer/bh context. In the timer/bh context
bhs are disabled, so you need to use the _bh lock calls from the
thread context callers.
Signed-off-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
If the unmap thread has already run find_free_blocks
but not yet run prepare_to_wait when a wake_up(&unmap_wait)
call is done, the unmap thread is going to miss the wake
call. Instead of adding checks for if new waiters were added
this just has us use a work queue which will run us again
in this type of case.
Signed-off-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Separate unmap_thread_fn to make it easier to read.
Note: this patch does not fix the bug where we might
miss a wake up call. The next patch will fix that.
This patch only separates the code into functions.
Signed-off-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Have unmap_thread_fn use tcmu_blocks_release.
Signed-off-by: Mike Christie <mchristi@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
iscsi_parse_pr_out_transport_id launders the const away via a call to
strstr(), and then modifies the buffer (writing a nul byte) through
the return value. It's cleaner to be honest and simply declare the
parameter as "char*", fixing up the call chain, and allowing us to
drop the cast in the return statement.
Amusingly, the two current callers found it necessary to cast a
non-const pointer to a const.
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
An sht3x sensor include limits register which contains temperature
and humidity limit values. After a reset, pre-defined values are loaded
into that register. During the probe function, the driver reads the
limits register. However, if the reads are made too early, and the bus
is clocked at high frequencies (e.g. 100 kHz or more), the loading could be
not completed and the sensor returns a NACK which causes the probe to fail.
A delay of at least 500 us before the first read solves this issue.
Signed-off-by: Emiliano Ingrassia <ingrassia@epigenesys.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
On Armada 7K/8K we need to explicitly enable the bus clock. The bus clock
is optional because not all the SoCs need them but at least for Armada
7K/8K it is actually mandatory.
The binding documentation is updating accordingly as well as mentioning
the mandatory clock which was also missing.
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
