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2014-05-27mlx5_core: Fix signature handover operation for interleaved buffersSagi Grimberg
When the data and protection are interleaved in the memory domain, no need to expand the mkey total length. At the moment no Linux user works (iSER initiator & target) in interleaved mode. This may change in the future as for SCSI pass-through devices there is no real point in target performing de-interleaving and re-interleaving of the protection data in the PT stage. Regardless, signature verbs support this mode. Signed-off-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Roland Dreier <roland@purestorage.com>
2014-05-27ARM: OMAP2+: Fix ssi hwmod entry to allow idlingTony Lindgren
The current entry prevents system from idling if the hwmod is defined in the .dts file so let's change the idlemodes. Note that we probably don't have SYSC_HAS_EMUFREE or SYSS_HAS_RESET_STATUS either. If we do, those can be added later on. Acked-by: Sebastian Reichel <sre@kernel.org> Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-05-27ARM: msm: Silence readb/writeb warnings due to missing IOMEM()Stephen Boyd
TROUT_CPLD_BASE needs the IOMEM() treatment to avoid warnings from the read/writeb functions. Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Olof Johansson <olof@lixom.net>
2014-05-27PCI: Add new pci_is_bridge() interfaceYijing Wang
Add a helper function to check a device's header type for PCI bridge or CardBus bridge. Requires: 326c1cdae741 PCI: Rename pci_is_bridge() to pci_has_subordinate() Signed-off-by: Yijing Wang <wangyijing@huawei.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-05-27Merge tag 'keystone-soc-2' of ↵Olof Johansson
git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux-keystone into next/soc2 Merge "Keystone SOC updates part2 for 3.16" from Santosh Shilimkar: - Removal of now un-necessary reset machine code - dts updates for keystone reset driver * tag 'keystone-soc-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux-keystone: ARM: configs: keystone: enable reset driver support ARM: dts: keystone: update reset node to work with reset driver ARM: keystone: remove redundant reset stuff Signed-off-by: Olof Johansson <olof@lixom.net>
2014-05-27Merge tag 'keystone-reset-driver' of ↵Olof Johansson
git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux-keystone into next/drivers Merge "Keystone Reset driver for 3.16" from Santosh Shilimkar: * tag 'keystone-reset-driver' of git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux-keystone: power: reset: keystone-reset: introduce keystone reset driver Documentation: dt: add bindings for keystone pll control controller Documentation: dt: add bindings for keystone reset driver Signed-off-by: Olof Johansson <olof@lixom.net>
2014-05-27ARM: multi_v7_defconfig: Enable Zynq peripheral driversSoren Brinkmann
A few drivers for Zynq peripherals made it into mainline recently. Enable them in the defconfig. The following devices are enabled: - Cadence Macb Ethernet controller - Cadence I2C controller - Arasan SDHCI Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com> Signed-off-by: Olof Johansson <olof@lixom.net>
2014-05-27blk-mq: pass in suggested NUMA node to ->alloc_hctx()Jens Axboe
Drivers currently have to figure this out on their own, and they are missing information to do it properly. The ones that did attempt to do it, do it wrong. So just pass in the suggested node directly to the alloc function. Signed-off-by: Jens Axboe <axboe@fb.com>
2014-05-27MAINTAINERS: Add reset controller framework entryPhilipp Zabel
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Signed-off-by: Olof Johansson <olof@lixom.net>
2014-05-27Merge branch 'master' of ↵John W. Linville
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem
2014-05-27Merge branch 'master' of ↵John W. Linville
git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless
2014-05-27Merge tag 'irqchip-3.16' of git://git.infradead.org/users/jcooper/linux into ↵Thomas Gleixner
irq/core irqchip core changes for v3.16 collected by Jason Cooper: - irq-gic: Use a mask field - irq-armada-370-xp: Move the DT binding docs to the irqchip directory - irq-brcmstb-l2: New driver for Broadcom Set Top Box Level-2
2014-05-27PCI: Rename pci_is_bridge() to pci_has_subordinate()Yijing Wang
Previously, pci_is_bridge() returned true only when a subordinate bus existed. Rename pci_is_bridge() to pci_has_subordinate() to better indicate what we're checking. No functional change. [bhelgaas: changelog] Signed-off-by: Yijing Wang <wangyijing@huawei.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-05-27NVMe: Implement PCIe reset notification callbackKeith Busch
Quiesce and shutdown the device prior to reset, then restart the device and resume IO after. Signed-off-by: Keith Busch <keith.busch@intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-05-27PCI: Notify driver before and after device resetKeith Busch
Notify a PCI device driver when its device's access is about to be disabled for an impending reset attempt, then after the attempt completes and device access is restored. The notification is via the pci_error_handlers interface. Signed-off-by: Keith Busch <keith.busch@intel.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-05-27ext4: fix wrong assert in ext4_mb_normalize_request()Maurizio Lombardi
The variable "size" is expressed as number of blocks and not as number of clusters, this could trigger a kernel panic when using ext4 with the size of a cluster different from the size of a block. Cc: stable@vger.kernel.org Signed-off-by: Maurizio Lombardi <mlombard@redhat.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2014-05-27ext4: fix zeroing of page during writebackJan Kara
Tail of a page straddling inode size must be zeroed when being written out due to POSIX requirement that modifications of mmaped page beyond inode size must not be written to the file. ext4_bio_write_page() did this only for blocks fully beyond inode size but didn't properly zero blocks partially beyond inode size. Fix this. The problem has been uncovered by mmap_11-4 test in openposix test suite (part of LTP). Reported-by: Xiaoguang Wang <wangxg.fnst@cn.fujitsu.com> Fixes: 5a0dc7365c240 Fixes: bd2d0210cf22f CC: stable@vger.kernel.org Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2014-05-27ext4: remove unused local variable "stored" from ext4_readdir(...)Giedrius Rekasius
Remove local variable "stored" from ext4_readdir(...). This variable gets initialized but is never used inside the function. Signed-off-by: Giedrius Rekasius <giedrius.rekasius@gmail.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2014-05-27ext4: fix ZERO_RANGE test failure in data journallingNamjae Jeon
xfstests generic/091 is failing when mounting ext4 with data=journal. I think that this regression is same problem that occurred prior to collapse range issue. So ZERO RANGE also need to call ext4_force_commit as collapse range. Cc: stable@vger.kernel.org Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com> Signed-off-by: Ashish Sangwan <a.sangwan@samsung.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2014-05-27x86/PCI: Clean up and mark early_root_info_init() as deprecatedSuravee Suthikulpanit
early_root_info_init() is now deprecated in favor of info in ACPI. Add a note to that effect. Also, clean up the code a bit. There is no functional change. Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2014-05-27ARM: at91/defconfig: sama5_defconfig: updatedWenyou Yang
due to enabling -- CONFIG_REGULATOR -- CONFIG_REGULATOR_ACT8865 Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com> [nicolas.ferre@atmel.com: move added entries to proper location within file] Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Olof Johansson <olof@lixom.net>
2014-05-27ACPI: Clean up acpi_os_map/unmap_memory() to eliminate __iomem.Lv Zheng
ACPICA doesn't include protections around address space checking, Linux build tests always complain increased sparse warnings around ACPICA internal acpi_os_map/unmap_memory() invocations. This patch tries to fix this issue permanently. There are 2 choices left for us to solve this issue: 1. Add __iomem address space awareness into ACPICA. 2. Remove sparse checker of __iomem from ACPICA source code. This patch chooses solution 2, because: 1. Most of the acpi_os_map/unmap_memory() invocations are used for ACPICA. table mappings, which in fact are not IO addresses. 2. The only IO addresses usage is for "system memory space" mapping code in: drivers/acpi/acpica/exregion.c drivers/acpi/acpica/evrgnini.c drivers/acpi/acpica/exregion.c The mapped address is accessed in the handler of "system memory space" - acpi_ex_system_memory_space_handler(). This function in fact can be changed to invoke acpi_os_read/write_memory() so that __iomem can always be type-casted in the OSL layer. According to the above investigation, we drew the following conclusion: It is not a good idea to introduce __iomem address space awareness into ACPICA mostly in order to protect non-IO addresses. We can simply remove __iomem for acpi_os_map/unmap_memory() to remove __iomem checker for ACPICA code. Then we need to enforce external usages to invoke other APIs that are aware of __iomem address space. The external usages are: drivers/acpi/apei/einj.c drivers/acpi/acpi_extlog.c drivers/char/tpm/tpm_acpi.c drivers/acpi/nvs.c This patch thus performs cleanups in this way: 1. Add acpi_os_map/unmap_iomem() to be invoked by non-ACPICA code. 2. Remove __iomem from acpi_os_map/unmap_memory(). Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-05-27ACPICA: Clean up redudant definitions already defined elsewhereLv Zheng
Since mis-order issues have been solved, we can cleanup redundant definitions that already have defaults in <acpi/platform/acenv.h>. This patch removes redudant environments for __KERNEL__ surrounded code. Signed-off-by: Lv Zheng <lv.zheng@intel.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-05-27ACPICA: Linux headers: Add <asm/acenv.h> to remove mis-ordered inclusion of ↵Lv Zheng
<asm/acpi.h> There is a mis-order inclusion for <asm/acpi.h>. As we will enforce including <linux/acpi.h> for all Linux ACPI users, we can find the inclusion order is as follows: <linux/acpi.h> <acpi/acpi.h> <acpi/platform/acenv.h> (acenv.h before including aclinux.h) <acpi/platform/aclinux.h> ........................................................................... (aclinux.h before including asm/acpi.h) <asm/acpi.h> @Redundant@ (ACPICA specific stuff) ........................................................................... ........................................................................... (Linux ACPI specific stuff) ? - - - - - - - - - - - - + (aclinux.h after including asm/acpi.h) @Invisible@ | (acenv.h after including aclinux.h) @Invisible@ | other ACPICA headers @Invisible@ | ............................................................|.............. <acpi/acpi_bus.h> | <acpi/acpi_drivers.h> | <asm/acpi.h> (Excluded) | (Linux ACPI specific stuff) ! <- - - - - - - - - - - - - + NOTE that, in ACPICA, <acpi/platform/acenv.h> is more like Kconfig generated <generated/autoconf.h> for Linux, it is meant to be included before including any ACPICA code. In the above figure, there is a question mark for "Linux ACPI specific stuff" in <asm/acpi.h> which should be included after including all other ACPICA header files. Thus they really need to be moved to the position marked with exclaimation mark or the definitions in the blocks marked with "@Invisible@" will be invisible to such architecture specific "Linux ACPI specific stuff" header blocks. This leaves 2 issues: 1. All environmental definitions in these blocks should have a copy in the area marked with "@Redundant@" if they are required by the "Linux ACPI specific stuff". 2. We cannot use any ACPICA defined types in <asm/acpi.h>. This patch splits architecture specific ACPICA stuff from <asm/acpi.h> to fix this issue. Signed-off-by: Lv Zheng <lv.zheng@intel.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-05-27ACPICA: Linux headers: Add <acpi/platform/aclinuxex.h>Lv Zheng
From ACPICA's perspective, <acpi/actypes.h> should be included after inclusion of <acpi/platform/acenv.h>. But currently in Linux, <acpi/platform/aclinux.h> included by <acpi/platform/acenv.h> has included <acpi/actypes.h> to find ACPICA types for inline functions. This causes the following problem: 1. Redundant code in <asm/acpi.h> and <acpi/platform/aclinux.h>: Linux must be careful to keep conditions for <acpi/actypes.h> inclusion consistent with the conditions for <acpi/platform/aclinux.h> inclusion. Which finally leads to the issue that we have to keep many useless macro definitions in <acpi/platform/aclinux.h> or <asm/acpi.h>. Such conditions include: COMPILER_DEPENDENT_UINT64 COMPILER_DEPENDENT_INT64 ACPI_INLINE ACPI_SYSTEM_XFACE ACPI_EXTERNAL_XFACE ACPI_INTERNAL_XFACE ACPI_INTERNAL_VAR_XFACE ACPI_MUTEX_TYPE DEBUGGER_THREADING ACPI_ACQUIRE_GLOBAL_LOCK ACPI_RELEASE_GLOBAL_LOCK ACPI_FLUSH_CPU_CACHE They have default implementations in <include/acpi/platform/acenv.h> while Linux need to keep a copy in <asm/acpi.h> to avoid build errors. This patch introduces <acpi/platform/aclinuxex.h> to fix this issue by splitting conditions and declarations (most of them are inline functions) into 2 header files so that the wrong inclusion of <acpi/actypes.h> can be removed from <acpi/platform/aclinux.h>. This patch also removes old ACPI_NATIVE_INTERFACE_HEADER mechanism which is not preferred by Linux and adds the platform/acenvex.h to be the solution to solve this issue. Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-05-27ACPICA: Linux headers: Remove ACPI_PREEMPTION_POINT() due to no usages.Lv Zheng
This patch deletes deprecated ACPI_PREEMPTION_POINT(), there is no user for it in Linux kernel now. Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-05-27Merge back earlier ACPICA material.Rafael J. Wysocki
Conflicts: drivers/acpi/acpica/acglobal.h
2014-05-27regdb: Generalize the mW to dBm power conversionchaitanya.mgit@gmail.com
Generalize the power conversion from mW to dBm using log. This should fix the below compilation error for country NO which adds a new power value 2000mW which is not handled earlier. CC [M] net/wireless/wext-sme.o CC [M] net/wireless/regdb.o net/wireless/regdb.c:1130:1: error: Unknown undeclared here (not in a function) net/wireless/regdb.c:1130:9: error: expected } before power make[2]: *** [net/wireless/regdb.o] Error 1 make[1]: *** [net/wireless] Error 2 make: *** [net] Error 2 Reported-By: John Walker <john@x109.net> Signed-off-by: Chaitanya T K <chaitanya.mgit@gmail.com> Acked-by: John W. Linville <linville@tuxdriver.com> [remove unneeded parentheses, fix rounding by using %.0f] Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-05-27Merge branch 'topic/firewire' into for-nextTakashi Iwai
This is a merge of big firewire audio stack updates by Takashi Sakamoto.
2014-05-27block: only allocate/free mq_usage_counter in blk-mqMing Lei
The percpu counter is only used for blk-mq, so move its allocation and free inside blk-mq, and don't allocate it for legacy queue device. Signed-off-by: Ming Lei <tom.leiming@gmail.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2014-05-27blk-mq: avoid code duplicationMing Lei
blk_mq_exit_hw_queues() and blk_mq_free_hw_queues() are introduced to avoid code duplication. Signed-off-by: Ming Lei <tom.leiming@gmail.com> Signed-off-by: Jens Axboe <axboe@fb.com>
2014-05-27ALSA: bebob: Improve comments about stream formatTakashi Sakamoto
Currently bebob driver apply Raw Audio Data channel (in IEC 61883-1:2002, Multi Bit Linear Audio Data channel in IEC 61883-6:20005) to IEC 60958 Conformant Data channel because both fireworks and bebob based devices can handle it by ignoring each label. This patch improves a comment about this. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-05-27ALSA: bebob: Remove meaningless mutex_unlock()Takashi Sakamoto
Currently mutex_unlock() is called in module's cleanup function. But after cleaned up, this mutex is automatically released. So this function call is meaningless. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-05-27ALSA: bebob: Add static specifier to identifier with file scopeTakashi Sakamoto
Some variables were declared without static even if they're not referred to from external files. This commit make them local symbols for better information-hiding by file unit. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-05-27ALSA: bebob: Use different names for identifiers in the same fileTakashi Sakamoto
To suppress 'sparse' warning. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-05-27ALSA: fireworks/bebob: Improve indentationTakashi Sakamoto
According to coding rule. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-05-27ALSA: fireworks/bebob: Add suffix for long long integer literalTakashi Sakamoto
This commit adds suffix to register values of each device, to supress 'sparse' warnings. Additionally, this commit changes offset values with integer literal. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-05-27ALSA: fireworks/bebob: Use the same type of variables as function parametersTakashi Sakamoto
The second argument of snd_efw_command_get_sampling_rate() means sampling rate and its type is 'unsigned int'. But 'int' variable is passed as parameter. It's better to apply the same type for the variable as its argument. Similally, the type of variable for snd_efw_command_get_clock_source() and avc_bridgeco_get_plug_type() should be the same type as each argument. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-05-27ALSA: fireworks/bebob: Change type of argument for sampling rateTakashi Sakamoto
Originally, I intent to this argument given with 'struct snd_pcm_runtime.rate' or params_rate(). They return value of 'unsigned int'. So 'unsigned int' is better for the type of this argument. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-05-27ALSA: fireworks: Use the same prototype for functions as actual declarationTakashi Sakamoto
There are two modes for Fireworks, IEC 61883 compliant or Windows. So it's better to use enum type instead of int to express the intension, even if C language specification defines to handle enum variables as usual integer. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-05-27ALSA: fireworks: Fix wrong value as argument for PTR_ERR()Takashi Sakamoto
The return value of memdup_user() should be passed to return correct error. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-05-27ALSA: firewire-lib: Fix sparse warning of incorrect type in assignmentTakashi Sakamoto
__be32 value should not be assigned directly to bool value. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-05-27ALSA: firewire-lib: Use ARRAY_SIZE() instead of sizeof() for correct loop limitTakashi Sakamoto
This commit fixes a big for loop count with array. The limitation of loop count should be calcurated with the number of elements in the array, not with the number of bytes. Aditionally, this commit apply the same declaration as a prototype in header for the array. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-05-27nfsd4: allow space for final error returnJ. Bruce Fields
This post-encoding check should be taking into account the need to encode at least an out-of-space error to the following op (if any). Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2014-05-27nfsd4: fix encoding of out-of-space repliesJ. Bruce Fields
If nfsd4_check_resp_size() returns an error then we should really be truncating the reply here, otherwise we may leave extra garbage at the end of the rpc reply. Also add a warning to catch any cases where our reply-size estimates may be wrong in the case of a non-idempotent operation. Signed-off-by: J. Bruce Fields <bfields@redhat.com>
2014-05-27ASoC: wm_adsp: Use adsp_err/warn instead of dev_err/warnCharles Keepax
We have defines for adsp messages best to consistently use them. Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Signed-off-by: Mark Brown <broonie@linaro.org>
2014-05-27dm mpath: really fix lockdep warningHannes Reinecke
lockdep complains about a circular locking. And indeed, we need to release the lock before calling dm_table_run_md_queue_async(). As such, commit 4cdd2ad ("dm mpath: fix lock order inconsistency in multipath_ioctl") must also be reverted in addition to fixing the lock order in the other dm_table_run_md_queue_async() callers. Reported-by: Bart van Assche <bvanassche@acm.org> Tested-by: Bart van Assche <bvanassche@acm.org> Signed-off-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2014-05-27Documentation: brcmstb-l2: Add Broadcom STB Level-2 interrupt controller bindingFlorian Fainelli
This patch adds the Device Tree binding document for the Broadcom Set-top-box Level 2 interrupt controller hardware. Signed-off-by: Brian Norris <computersforpeace@gmail.com> Link: https://lkml.kernel.org/r/1400892054-24457-3-git-send-email-f.fainelli@gmail.com Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2014-05-27irqchip: brcmstb-l2: Add Broadcom Set Top Box Level-2 interrupt controllerFlorian Fainelli
This patch adds support for the Level-2 interrupt controller hardware found in Broadcom Set Top Box System-on-a-Chip devices. This interrupt controller is implemented using the generic IRQ chip driver with separate enable and disable registers. Signed-off-by: Brian Norris <computersforpeace@gmail.com> Link: https://lkml.kernel.org/r/1400892054-24457-2-git-send-email-f.fainelli@gmail.com Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Jason Cooper <jason@lakedaemon.net>
2014-05-27virtio_blk: fix race between start and stop queueMing Lei
When there isn't enough vring descriptor for adding to vq, blk-mq will be put as stopped state until some of pending descriptors are completed & freed. Unfortunately, the vq's interrupt may come just before blk-mq's BLK_MQ_S_STOPPED flag is set, so the blk-mq will still be kept as stopped even though lots of descriptors are completed and freed in the interrupt handler. The worst case is that all pending descriptors are freed in the interrupt handler, and the queue is kept as stopped forever. This patch fixes the problem by starting/stopping blk-mq with holding vq_lock. Cc: Jens Axboe <axboe@kernel.dk> Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Ming Lei <tom.leiming@gmail.com> Cc: stable@kernel.org Signed-off-by: Jens Axboe <axboe@fb.com> Conflicts: drivers/block/virtio_blk.c