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Moni Shoua dda7599436 net/mlx5: Take lock with IRQs disabled to avoid deadlock 
[ Upstream commit 33814e5d12 ]

The lock in qp_table might be taken from process context or from
interrupt context. This may lead to a deadlock unless it is taken with
IRQs disabled.

Discovered by lockdep

================================
WARNING: inconsistent lock state
4.20.0-rc6
--------------------------------
inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W}

python/12572 [HC1[1]:SC0[0]:HE0:SE1] takes:
00000000052a4df4 (&(&table->lock)->rlock#2){?.+.}, /0x50 [mlx5_core]
{HARDIRQ-ON-W} state was registered at:
  _raw_spin_lock+0x33/0x70
  mlx5_get_rsc+0x1a/0x50 [mlx5_core]
  mlx5_ib_eqe_pf_action+0x493/0x1be0 [mlx5_ib]
  process_one_work+0x90c/0x1820
  worker_thread+0x87/0xbb0
  kthread+0x320/0x3e0
  ret_from_fork+0x24/0x30
irq event stamp: 103928
hardirqs last  enabled at (103927): [] nk+0x1a/0x1c
hardirqs last disabled at (103928): [] unk+0x1a/0x1c
softirqs last  enabled at (103924): [] tcp_sendmsg+0x31/0x40
softirqs last disabled at (103922): [] 80

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(&(&table->lock)->rlock#2);

    lock(&(&table->lock)->rlock#2);

 *** DEADLOCK ***

Fixes: 032080ab43 ("IB/mlx5: Lock QP during page fault handling")
Signed-off-by: Moni Shoua <monis@mellanox.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-01-27 14:50:15 +01:00
..
accessibility
acpi ACPI: sysfs: Change ACPI_MASKABLE_GPE_MAX to 0x100 2020-01-09 10:19:04 +01:00
amba
android binder: Handle start==NULL in binder_update_page_range() 2019-12-13 08:52:52 +01:00
ata libata: Fix retrieving of active qcs 2020-01-09 10:19:01 +01:00
atm atm: zatm: Fix empty body Clang warnings 2019-12-01 09:16:41 +01:00
auxdisplay
base drivers/base/platform.c: kmemleak ignore a known leak 2019-12-05 09:21:04 +01:00
bcma
block xen/blkfront: Adjust indentation in xlvbd_alloc_gendisk 2020-01-23 08:21:36 +01:00
bluetooth Bluetooth: btusb: fix PM leak in error case of setup 2020-01-09 10:19:04 +01:00
bus bus: ti-sysc: Add mcasp optional clocks flag 2020-01-27 14:50:02 +01:00
cdrom cdrom: respect device capabilities during opening action 2020-01-04 19:13:12 +01:00
char ipmi: Fix memory leak in __ipmi_bmc_register 2020-01-27 14:49:53 +01:00
clk clk: sunxi-ng: sun8i-a23: Enable PLL-MIPI LDOs when ungating it 2020-01-27 14:50:15 +01:00
clocksource clocksource/drivers/timer-of: Use unique device name instead of timer 2020-01-04 19:12:45 +01:00
connector
cpufreq cpufreq: imx6q: read OCOTP through nvmem for imx6ul/imx6ull 2020-01-12 12:17:24 +01:00
cpuidle cpuidle: Do not unset the driver if it is there already 2019-12-17 20:35:00 +01:00
crypto crypto: brcm - Fix some set-but-not-used warning 2020-01-27 14:50:13 +01:00
dax
dca
devfreq PM / devfreq: Check NULL governor in available_governors_show 2020-01-09 10:19:03 +01:00
dio
dma ioat: ioat_alloc_ring() failure handling. 2020-01-17 19:47:16 +01:00
dma-buf dma-buf: Fix memory leak in sync_file_merge() 2019-12-21 10:57:38 +01:00
edac EDAC/ghes: Fix grain calculation 2019-12-31 16:35:58 +01:00
eisa
extcon extcon: sm5502: Reset registers during initialization 2019-12-31 16:35:11 +01:00
firewire net: add annotations on hh->hh_len lockless accesses 2020-01-09 10:19:09 +01:00
firmware firmware: coreboot: Let OF core populate platform device 2020-01-27 14:49:55 +01:00
fmc
fpga
fsi fsi: core: Fix small accesses and unaligned offsets via sysfs 2019-12-31 16:35:55 +01:00
gnss
gpio gpio: mpc8xxx: Add platform device to gpiochip->parent 2020-01-17 19:47:14 +01:00
gpu drm/etnaviv: NULL vs IS_ERR() buf in etnaviv_core_dump() 2020-01-27 14:50:13 +01:00
hid HID: hidraw, uhid: Always report EPOLLOUT 2020-01-17 19:46:55 +01:00
hsi
hv vmbus: keep pointer to ring buffer page 2019-11-20 18:47:31 +01:00
hwmon hwmon: (pmbus/ibm-cffps) Switch LEDs to blocking brightness call 2020-01-23 08:21:39 +01:00
hwspinlock
hwtracing intel_th: pci: Add Elkhart Lake SOC support 2019-12-31 16:36:24 +01:00
i2c i2c: i2c-stm32f7: fix 10-bits check in slave free id search loop 2020-01-27 14:49:51 +01:00
ide
idle
iio iio: buffer: align the size of scan bytes to size of the largest element 2020-01-23 08:21:27 +01:00
infiniband IB/mlx5: Don't override existing ip_protocol 2020-01-27 14:50:14 +01:00
input Input: nomadik-ske-keypad - fix a loop timeout test 2020-01-27 14:50:07 +01:00
iommu iommu/mediatek: Correct the flush_iotlb_all callback 2020-01-17 19:47:11 +01:00
ipack
irqchip irqchip: Place CONFIG_SIFIVE_PLIC into the menu 2020-01-23 08:21:36 +01:00
isdn staging: gigaset: add endpoint-type sanity check 2019-12-17 20:34:33 +01:00
leds leds: lm3692x: Handle failure to probe the regulator 2020-01-04 19:12:43 +01:00
lightnvm lightnvm: pblk: consider max hw sectors supported for max_write_pgs 2019-11-24 08:20:52 +01:00
macintosh macintosh/windfarm_smu_sat: Fix debug output 2019-12-01 09:16:37 +01:00
mailbox mailbox: ti-msgmgr: Off by one in ti_msgmgr_of_xlate() 2020-01-27 14:50:04 +01:00
mcb
md block: fix an integer overflow in logical block size 2020-01-23 08:21:29 +01:00
media media: tw9910: Unregister subdevice with v4l2-async 2020-01-27 14:50:14 +01:00
memory memory: tegra: Don't invoke Tegra30+ specific memory timing setup on Tegra20 2020-01-27 14:50:13 +01:00
memstick memstick: jmb38x_ms: Fix an error handling path in 'jmb38x_ms_probe()' 2019-10-29 09:20:07 +01:00
message scsi: mptfusion: Fix double fetch bug in ioctl 2020-01-23 08:21:28 +01:00
mfd mfd: intel-lpss: Add default I2C device properties for Gemini Lake 2020-01-27 14:49:51 +01:00
misc mei: replace POLL* with EPOLL* for write queues. 2020-01-27 14:49:57 +01:00
mmc mmc: sdhci: Add a quirk for broken command queuing 2019-12-31 16:36:36 +01:00
mtd mtd: devices: fix mchp23k256 read and write 2020-01-23 08:21:37 +01:00
mux
net net/mlx5: Take lock with IRQs disabled to avoid deadlock 2020-01-27 14:50:15 +01:00
nfc NFC: pn533: fix bulk-message timeout 2020-01-23 08:21:34 +01:00
ntb NTB: ntb_hw_idt: replace IS_ERR_OR_NULL with regular NULL checks 2020-01-27 14:50:01 +01:00
nubus
nvdimm libnvdimm/btt: fix variable 'rc' set but not used 2020-01-04 19:13:00 +01:00
nvme nvme-fc: fix double-free scenarios on hw queues 2020-01-09 10:18:54 +01:00
nvmem nvmem: imx-ocotp: reset error status on probe 2019-12-31 16:35:37 +01:00
of of: unittest: fix memory leak in attach_node_and_children 2019-12-17 20:36:04 +01:00
opp OPP: Fix missing debugfs supply directory for OPPs 2020-01-27 14:50:04 +01:00
oprofile
parisc
parport parport: load lowlevel driver if ports not found 2019-12-31 16:36:01 +01:00
pci switchtec: Remove immediate status check after submitting MRPC command 2020-01-27 14:50:05 +01:00
pcmcia
perf
phy phy: cpcap-usb: Fix flakey host idling and enumerating of devices 2020-01-14 20:07:08 +01:00
pinctrl pinctrl: sh-pfc: sh7734: Remove bogus IPSR10 value 2020-01-27 14:50:07 +01:00
platform platform/x86: GPD pocket fan: Use default values when wrong modparams are given 2020-01-17 19:47:04 +01:00
pnp
power power: supply: cpcap-battery: Fix signed counter sample register 2019-12-17 20:35:37 +01:00
powercap
pps
ps3
ptp ptp: free ptp device pin descriptors properly 2020-01-23 08:21:35 +01:00
pwm pwm: lpss: Release runtime-pm reference from the driver's remove callback 2020-01-27 14:49:59 +01:00
rapidio
ras
regulator regulator: rn5t618: fix module aliases 2020-01-12 12:17:18 +01:00
remoteproc remoteproc: qcom: q6v5-mss: Add missing regulator for MSM8996 2020-01-27 14:50:10 +01:00
reset reset: Fix memory leak in reset_control_array_put() 2019-12-05 09:19:36 +01:00
rpmsg rpmsg: glink: Free pending deferred work on remove 2019-12-21 10:57:30 +01:00
rtc rtc: cmos: ignore bogus century byte 2020-01-27 14:50:14 +01:00
s390 s390/qeth: Fix vnicc_is_in_use if rx_bcast not set 2020-01-17 19:47:01 +01:00
sbus
scsi scsi: core: scsi_trace: Use get_unaligned_be*() 2020-01-23 08:21:38 +01:00
sfi
sh
siox
slimbus slimbus: ngd: Fix build error on x86 2019-12-13 08:51:54 +01:00
sn
soc soc: renesas: r8a77990-sysc: Fix initialization order of 3DG-{A,B} 2019-12-13 08:52:29 +01:00
soundwire soundwire: intel: fix PDI/stream mapping for Bulk 2019-12-31 16:35:55 +01:00
spi spi/topcliff_pch: Fix potential NULL dereference on allocation error 2020-01-27 14:50:14 +01:00
spmi
ssb
staging staging: bcm2835-camera: fix module autoloading 2020-01-27 14:50:05 +01:00
target scsi: target: core: Fix a pr_debug() argument 2020-01-23 08:21:38 +01:00
tc
tee tee: optee: add missing of_node_put after of_device_is_available 2019-11-24 08:19:08 +01:00
thermal thermal: Fix deadlock in thermal thermal_zone_device_check 2019-12-13 08:52:50 +01:00
thunderbolt thunderbolt: Power cycle the router if NVM authentication fails 2019-12-05 09:21:27 +01:00
tty tty: serial: pch_uart: correct usage of dma_unmap_sg 2020-01-17 19:47:09 +01:00
uio vmbus: keep pointer to ring buffer page 2019-11-20 18:47:31 +01:00
usb usb: gadget: fsl_udc_core: check allocation return value and cleanup on failure 2020-01-27 14:49:57 +01:00
uwb
vfio vfio/pci: call irq_bypass_unregister_producer() before freeing irq 2019-12-21 10:57:37 +01:00
vhost vhost/vsock: accept only packets with the right dst_cid 2020-01-04 19:13:36 +01:00
video video/hdmi: Fix AVI bar unpack 2019-12-17 20:35:17 +01:00
virt virt: vbox: fix memory leak in hgcm_call_preprocess_linaddr 2019-11-06 13:06:04 +01:00
virtio virtio-balloon: fix managed page counts when migrating pages between zones 2019-12-17 20:34:43 +01:00
visorbus
vlynq
vme
w1 w1: IAD Register is yet readable trough iad sys file. Fix snprintf (%u for unsigned, count for max size). 2019-12-01 09:16:22 +01:00
watchdog watchdog: sprd: Fix the incorrect pointer getting from driver data 2020-01-27 14:49:53 +01:00
xen xen/balloon: fix ballooned page accounting without hotplug enabled 2020-01-09 10:18:58 +01:00
zorro
Kconfig
Makefile