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Emmanuel Grumbach a6bd005fe9 iwlwifi: pcie: fix RF-Kill vs. firmware load race 
When we load the firmware, we hold trans_pcie->mutex to
avoid nested flows. We also rely on the ISR to wake up the
thread when the DMA has finished copying a chunk. During
this flow, we enable the RF-Kill interrupt.

The problem is that the RF-Kill interrupt handler can take
the mutex and bring the device down. This means that if
we load the firmware while the RF-Kill switch is enabled
(which will happen when we load the INIT firmware to read
the device's capabilities and register to mac80211), we
may get an RF-Kill interrupt immediately and the ISR will
be waiting for the mutex held by the thread that is
currently loading the firmware. At this stage, the ISR
won't be able to service the DMA's interrupt needed to
wake up the thread that load the firmware. We are in a
deadlock situation which ends when the thread that loads
the firmware fails on timeout and releases the mutex.

To fix this, take the mutex later in the flow, disable
the interrupts and synchronize_irq() to give a chance to
the RF-Kill interrupt to run and complete.
After that, mask all the interrupts besides the DMA
interrupt and proceed with firmware load. Make sure to
check that there was no RF-Kill interrupt when the
interrupts were disabled.

This fixes https://bugzilla.kernel.org/show_bug.cgi?id=111361

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
2016-02-15 13:38:25 +02:00
..
accessibility
acpi ACPI / property: avoid leaking format string into kobject name 2016-01-08 01:01:41 +01:00
amba
android
ata Merge branch 'for-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata 2016-01-11 19:33:59 -08:00
atm atm: solos-pci: use to_pci_dev() 2015-12-29 15:32:24 -05:00
auxdisplay
base Merge branch 'component' of git://ftp.arm.linux.org.uk/~rmk/linux-arm 2016-01-12 12:47:23 -08:00
bcma bcma: use module_init for the main part of bus initialization 2015-12-31 10:17:05 +02:00
block nbd: use ->compat_ioctl() 2016-01-08 21:20:32 -05:00
bluetooth Bluetooth: btmrvl: don't send data to firmware while processing suspend 2016-01-06 16:37:14 +01:00
bus bus: sunxi-rsb: Fix peripheral IC mapping runtime address 2015-12-22 11:42:30 -08:00
cdrom cdrom: don't open-code memdup_user() 2016-01-06 08:25:24 -05:00
char Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2016-01-12 18:51:14 -08:00
clk ARM: SoC fixes for 4.4-rc 2015-12-12 16:43:44 -08:00
clocksource Merge branches 'timers-core-for-linus' and 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-01-11 18:06:43 -08:00
connector connector: bump skb->users before callback invocation 2016-01-04 21:46:45 -05:00
cpufreq cpufreq: scpi-cpufreq: signedness bug in scpi_get_dvfs_info() 2015-12-24 02:11:37 +01:00
cpuidle cpuidle: mvebu: disable the bind/unbind attributes and use builtin_platform_driver 2015-10-23 12:40:48 +02:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2016-01-12 18:51:14 -08:00
dca
devfreq
dio
dma dmaengine: xgene-dma: Fix double IRQ issue by setting IRQ_DISABLE_UNLAZY flag 2016-01-07 11:09:36 +05:30
dma-buf dma-buf/fence: add fence_wait_any_timeout function v2 2015-10-30 01:16:16 -04:00
edac EDAC, i5100: Use to_delayed_work() 2016-01-01 18:31:34 +01:00
eisa
extcon Merge branches 'ib-extcon-mfd-4.4', 'ib-mfd-i2c-v4.4', 'ib-mfd-power-4.4', 'ib-mfd-regmap-4.4' and 'ib-mfd-regulator-4.4' into ibs-for-mfd-merged 2015-10-26 14:48:22 +00:00
firewire IEEE 1394 subsystem patch: 2015-11-11 10:21:34 -08:00
firmware Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm 2016-01-12 12:39:07 -08:00
fmc
fpga fpga manager: Fix firmware resource leak on error 2015-11-24 15:25:46 -08:00
gpio gpio: revert get() to non-errorprogating behaviour 2015-12-17 15:48:29 +01:00
gpu Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2016-01-12 17:11:47 -08:00
hid USB fixes for 4.4-rc5 2015-12-13 11:58:18 -08:00
hsi hsi: controllers:remove redundant code 2015-10-30 16:10:40 +01:00
hv drivers/hv: Move struct hv_timer_message_payload into UAPI Hyper-V x86 header 2015-12-16 18:49:41 +01:00
hwmon hwmon: (nct6683) Add basic support for NCT6683 on Mitac boards 2016-01-09 07:31:58 -08:00
hwspinlock
hwtracing Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending 2015-11-13 20:04:17 -08:00
i2c i2c: rcar: disable runtime PM correctly in slave mode 2015-12-19 12:00:37 +01:00
ide mm, page_alloc: rename __GFP_WAIT to __GFP_RECLAIM 2015-11-06 17:50:42 -08:00
idle
iio iio: adc: spmi-vadc: add missing of_node_put 2015-11-21 18:24:44 +00:00
infiniband IB/mlx5: Add flow steering support 2016-01-11 17:48:53 -05:00
input Merge branch 'patchwork' into v4l_for_linus 2016-01-11 11:13:27 -02:00
iommu Merge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-01-11 16:26:03 -08:00
ipack
irqchip Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-01-11 18:28:06 -08:00
isdn Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-01-11 23:55:43 -05:00
leds leds: add HAS_IOMEM dependency to LEDS_BCM6328/LEDS_BCM6358 2016-01-04 09:57:41 +01:00
lguest
lightnvm lightnvm: wrong offset in bad blk lun calculation 2015-12-29 08:28:32 -07:00
macintosh
mailbox mailbox: mailbox-test: avoid reading iomem twice 2015-11-04 14:03:04 +05:30
mcb mcb: Destroy IDA on module unload 2015-10-29 09:02:16 +09:00
md Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2016-01-12 17:11:47 -08:00
media media updates for v4.5-rc1 2016-01-11 22:17:44 -08:00
memory fsl-ifc: add missing include on ARM64 2015-12-16 00:16:58 +01:00
memstick
message SCSI queue for 4.4. 2015-11-12 07:06:18 -05:00
mfd [media] include/media: move platform_data to linux/platform_data/media 2015-11-17 06:58:42 -02:00
misc cxl: Set endianess of kernel contexts 2015-12-08 16:57:01 +11:00
mmc mmc: dw_mmc: remove the unused quirks 2016-01-05 18:04:58 +01:00
mtd This pull request contains three changes, two cleanups and one UBI 2016-01-12 18:20:20 -08:00
net iwlwifi: pcie: fix RF-Kill vs. firmware load race 2016-02-15 13:38:25 +02:00
nfc nfc: pn544: Remove i2c client gpio irq configuration 2015-12-29 19:06:23 +01:00
ntb NTB: fix 32-bit compiler warning 2015-11-08 16:24:43 -05:00
nubus
nvdimm libnvdimm, pmem: fix size trim in pmem_direct_access() 2015-11-12 09:55:23 -08:00
nvme NVMe: IO ending fixes on surprise removal 2015-12-22 10:12:04 -07:00
nvmem
of mdio: remove an unneed condition 2016-01-12 11:51:57 -05:00
oprofile
parisc parisc iommu: fix panic due to trying to allocate too large region 2015-12-12 16:07:25 +01:00
parport
pci Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-01-11 18:28:06 -08:00
pcmcia
perf drivers/perf: kill armpmu_register 2015-11-16 15:41:49 +00:00
phy phy: core: Get a refcount to phy in devm_of_phy_get_by_index() 2015-12-07 18:44:02 +05:30
pinctrl This is the bulk of pin control patches for the v4.5 2016-01-11 20:05:39 -08:00
platform platform/chrome: Branch for v4.4 2015-11-13 21:53:18 -08:00
pnp
power - New Device Support 2015-11-06 10:23:50 -08:00
powercap powercap / RAPL: fix BIOS lock check 2015-12-12 02:31:11 +01:00
pps
ps3
ptp
pwm pwm: Changes for v4.4-rc1 2015-11-11 09:16:10 -08:00
rapidio
ras
regulator spi: Updates for v4.4 2015-11-05 13:15:12 -08:00
remoteproc remoteproc: fix memory leak of remoteproc ida cache layers 2015-11-26 17:44:28 +02:00
reset
rpmsg
rtc rtc: da9063: fix access ordering error during RTC interrupt at system power on 2015-12-20 13:39:29 +01:00
s390 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2016-01-12 18:57:02 -08:00
sbus convert a bunch of open-coded instances of memdup_user_nul() 2016-01-04 10:26:58 -05:00
scsi Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2016-01-12 18:57:02 -08:00
sfi
sh drivers: sh: Get rid of CONFIG_ARCH_SHMOBILE_MULTI 2015-11-17 02:12:46 +09:00
sn
soc Merge branches 'misc' and 'misc-rc6' into for-linus 2016-01-05 11:07:28 +00:00
spi Merge remote-tracking branches 'spi/fix/dspi' and 'spi/fix/spidev' into spi-linus 2015-12-16 13:28:32 +00:00
spmi char/misc drivers for 4.4-rc1 2015-11-04 22:15:15 -08:00
ssb ssb: pick SoC invariants code from MIPS BCM47xx arch 2015-12-16 16:36:25 +02:00
staging Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2016-01-12 18:57:02 -08:00
target target/stat: print full t10_wwn.model buffer 2015-11-28 21:23:13 -08:00
tc
thermal imx: thermal: use CPU temperature grade info for thresholds 2015-11-23 16:38:40 -08:00
thunderbolt
tty Merge branch 'for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu into core/rcu 2016-01-06 11:41:48 +01:00
uio
usb Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2016-01-12 17:11:47 -08:00
uwb driver core update for 4.4-rc1 2015-11-04 21:50:37 -08:00
vfio Revert: "vfio: Include No-IOMMU mode" 2015-12-04 08:38:42 -07:00
vhost Revert "Merge branch 'vsock-virtio'" 2015-12-08 21:55:49 -05:00
video OMAPDSS: fix timings for VENC to match what omapdrm expects 2015-12-09 12:57:13 +02:00
virt
virtio virtio_ring: shadow available ring flags & index 2015-12-07 17:28:11 +02:00
vlynq
vme char/misc drivers for 4.4-rc1 2015-11-04 22:15:15 -08:00
w1 power supply and reset changes for the v4.4 series 2015-11-05 12:28:15 -08:00
watchdog watchdog: mtk_wdt: Use MODE_KEY when stopping the watchdog 2015-11-23 09:00:09 +01:00
xen xen/gntdev: add ioctl for grant copy 2016-01-07 13:21:53 +00:00
zorro
Kconfig char/misc drivers for 4.4-rc1 2015-11-04 22:15:15 -08:00
Makefile null_blk: register as a LightNVM device 2015-11-16 15:22:28 -07:00