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6d27f92c54ce28cfbd2a8a479a96d6f4a781b7d2
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Sean Anderson 6d27f92c54 media: uvcvideo: Fix deadlock if uvc_status_stop is called from async_ctrl.work 
If a UVC camera has an asynchronous control, uvc_status_stop may be
called from async_ctrl.work:

uvc_ctrl_status_event_work()
    uvc_ctrl_status_event()
        uvc_ctrl_clear_handle()
	    uvc_pm_put()
	        uvc_status_put()
		    uvc_status_stop()
		        cancel_work_sync()

This will cause a deadlock, since cancel_work_sync will wait for
uvc_ctrl_status_event_work to complete before returning.

Fix this by returning early from uvc_status_stop if we are currently in
the work function. flush_status now remains false until uvc_status_start
is called again, ensuring that uvc_ctrl_status_event_work won't resubmit
the URB.

Fixes: a32d9c41bd ("media: uvcvideo: Make power management granular")
Cc: stable@vger.kernel.org
Closes: https://lore.kernel.org/all/6733bdfb-3e88-479f-8956-ab09c04c433e@linux.dev/
Signed-off-by: Sean Anderson <sean.anderson@linux.dev>
Link: https://patch.msgid.link/20260316155823.1855434-1-sean.anderson@linux.dev
Reviewed-by: Ricardo Ribalda <ribalda@chromium.org>
Tested-by: Ricardo Ribalda <ribalda@chromium.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans de Goede <johannes.goede@oss.qualcomm.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
2026-05-21 21:14:07 +02:00
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accel
Merge tag 'drm-next-2026-04-15' of https://gitlab.freedesktop.org/drm/kernel
2026-04-15 08:45:00 -07:00
accessibility
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acpi
Merge tag 'acpi-7.1-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
2026-04-23 12:29:22 -07:00
amba
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android
Merge tag 'char-misc-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
2026-04-24 13:23:50 -07:00
ata
Merge tag 'ata-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/libata/linux
2026-04-15 15:03:01 -07:00
atm
net: remove unused ATM protocols and legacy ATM device drivers
2026-04-23 12:21:14 -07:00
auxdisplay
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base
Merge tag 'regmap-fix-v7.1-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap
2026-04-24 12:11:26 -07:00
bcma
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block
Merge tag 'block-7.1-20260424' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux
2026-04-24 15:06:55 -07:00
bluetooth
Bluetooth: hci_qca: Fix missing wakeup during SSR memdump handling
2026-04-13 09:19:42 -04:00
bus
Merge tag 'char-misc-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
2026-04-24 13:23:50 -07:00
cache
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cdrom
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cdx
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char
Merge tag 'for-next-tpm-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jarkko/linux-tpmdd
2026-04-25 16:20:52 -07:00
clk
Merge tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux
2026-04-26 14:03:20 -07:00
clocksource
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comedi
Merge tag 'char-misc-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
2026-04-24 13:23:50 -07:00
connector
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counter
Merge tag 'v7.0-rc7' into char-misc-next
2026-04-06 09:04:53 +02:00
cpufreq
Merge tag 'devicetree-for-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
2026-04-17 14:09:02 -07:00
cpuidle
Merge tag 'powerpc-7.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
2026-04-14 17:10:15 -07:00
crypto
crypto: ccp - copy IV using skcipher ivsize
2026-04-16 17:37:03 +08:00
cxl
Merge tag 'cxl-for-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl
2026-04-17 15:52:58 -07:00
dax
Merge tag 'libnvdimm-for-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
2026-04-21 14:12:01 -07:00
dca
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devfreq
PM / devfreq: tegra30-devfreq: add support for Tegra114
2026-04-04 03:15:39 +09:00
dibs
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dio
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dma
Merge tag 'dmaengine-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine
2026-04-17 10:29:01 -07:00
dma-buf
Merge tag 'drm-fixes-2026-04-24' of https://gitlab.freedesktop.org/drm/kernel
2026-04-24 11:44:52 -07:00
dpll
dpll: zl3073x: add ref-sync pair support
2026-04-12 08:27:34 -07:00
edac
Merge tag 'ras_core_for_v7.1_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2026-04-14 15:32:39 -07:00
eisa
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extcon
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firewire
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firmware
Merge tag 'loongarch-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
2026-04-24 09:54:45 -07:00
fpga
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fsi
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fwctl
fwctl: Fix class init ordering to avoid NULL pointer dereference on device removal
2026-04-10 11:21:06 -03:00
gnss
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gpib
Merge tag 'v7.0-rc7' into char-misc-next
2026-04-06 09:04:53 +02:00
gpio
Merge tag 'gpio-fixes-for-v7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux
2026-04-24 11:59:46 -07:00
gpu
drm: renesas: rz-du: Switch to new VSP API
2026-05-21 09:10:15 +02:00
greybus
greybus: gb-beagleplay: bound bootloader receive buffering
2026-04-02 15:55:09 +02:00
hid
Merge tag 'input-for-v7.1-rc0' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
2026-04-22 18:36:40 -07:00
hsi
HSI: omap_ssi_port: remove depends on ARM
2026-04-02 22:33:44 +02:00
hte
hte: tegra194: Add Tegra264 GTE support
2026-04-12 23:29:31 -07:00
hv
Merge tag 'drm-fixes-2026-04-24' of https://gitlab.freedesktop.org/drm/kernel
2026-04-24 11:44:52 -07:00
hwmon
Merge tag 'hwmon-for-v7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging
2026-04-15 14:37:32 -07:00
hwspinlock
hwspinlock: u8500: delete driver
2026-04-06 09:43:18 -05:00
hwtracing
Merge tag 'char-misc-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
2026-04-24 13:23:50 -07:00
i2c
Merge tag 'i2c-host-7.1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/andi.shyti/linux into i2c/for-mergewindow
2026-04-20 00:03:38 +02:00
i3c
i3c: mipi-i3c-hci: fix IBI payload length calculation for final status
2026-04-12 22:06:02 +02:00
idle
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iio
Merge tag 'char-misc-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
2026-04-24 13:23:50 -07:00
infiniband
Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
2026-04-21 08:22:18 -07:00
input
Merge tag 'input-for-v7.1-rc0' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
2026-04-22 18:36:40 -07:00
interconnect
Merge tag 'icc-7.1-rc1' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/djakov/icc into char-misc-next
2026-04-07 10:06:50 +02:00
iommu
Merge tag 'dma-mapping-7.1-2026-04-16' of git://git.kernel.org/pub/scm/linux/kernel/git/mszyprowski/linux
2026-04-17 11:12:42 -07:00
ipack
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irqchip
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
2026-04-17 07:18:03 -07:00
leds
leds: class: Make led_remove_lookup() NULL-aware
2026-04-09 13:49:19 +01:00
macintosh
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mailbox
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mcb
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md
Merge tag 'for-7.1/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
2026-04-15 15:11:05 -07:00
media
media: uvcvideo: Fix deadlock if uvc_status_stop is called from async_ctrl.work
2026-05-21 21:14:07 +02:00
memory
Merge tag 'dma-mapping-7.1-2026-04-16' of git://git.kernel.org/pub/scm/linux/kernel/git/mszyprowski/linux
2026-04-17 11:12:42 -07:00
memstick
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message
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mfd
Merge tag 'mfd-next-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd
2026-04-20 11:31:01 -07:00
misc
Merge tag 'char-misc-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
2026-04-24 13:23:50 -07:00
mmc
mmc: sdhci-msm: Fix the wrapped key handling
2026-04-10 10:29:58 +02:00
most
most: usb: Use kzalloc_objs for endpoint address array
2026-04-02 17:06:09 +02:00
mtd
Merge tag 'mtd/for-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux
2026-04-17 17:57:04 -07:00
mux
Merge tag 'char-misc-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
2026-04-24 13:23:50 -07:00
net
Merge tag 'net-deletions' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
2026-04-24 09:41:58 -07:00
nfc
Merge tag 'gpio-updates-for-v7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux
2026-04-13 20:10:58 -07:00
ntb
Merge tag 'pci-v7.1-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci
2026-04-15 14:41:21 -07:00
nubus
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nvdimm
Merge tag 'vfs-7.1-rc1.integrity' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
2026-04-13 10:40:26 -07:00
nvme
Merge tag 'for-7.1/io_uring-20260411' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux
2026-04-13 16:22:30 -07:00
nvmem
Merge tag 'v7.0-rc7' into char-misc-next
2026-04-06 09:04:53 +02:00
of
Merge tag 'memblock-v7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock
2026-04-18 11:29:14 -07:00
opp
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parisc
parisc: led: fix reference leak on failed device registration
2026-04-17 15:46:46 +02:00
parport
parport: Remove completed item from to-do list
2026-04-02 17:05:56 +02:00
pci
Merge tag 'loongarch-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
2026-04-24 09:54:45 -07:00
pcmcia
Merge tag 'pcmcia-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brodo/linux
2026-04-23 11:22:16 -07:00
peci
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perf
Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
2026-04-14 16:48:56 -07:00
phy
Merge tag 'phy-for-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/phy/linux-phy
2026-04-17 10:22:08 -07:00
pinctrl
Merge tag 'pinctrl-v7.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl
2026-04-18 16:59:09 -07:00
platform
platform/x86: int3472: Add TPS68470 board data for intel nvl
2026-05-19 23:55:58 +03:00
pmdomain
pmdomain: qcom: rpmhpd: Add power domains for Hawi SoC
2026-04-08 12:01:37 +02:00
pnp
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power
Merge tag 'usb-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
2026-04-19 08:47:40 -07:00
powercap
powercap: intel_rapl: Consolidate PL4 and PMU support flags into rapl_defaults
2026-04-01 16:03:05 +02:00
pps
pps: change pps_class to a const struct
2026-04-02 16:33:00 +02:00
ps3
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ptp
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pwm
Merge tag 'pwm/fixes-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/ukleinek/linux
2026-04-23 08:37:07 -07:00
rapidio
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ras
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regulator
Merge tag 'regulator-fix-v7.1-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator
2026-04-24 13:06:25 -07:00
remoteproc
Merge tag 'rpmsg-v7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux
2026-04-17 14:18:55 -07:00
resctrl
Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
2026-04-20 16:46:22 -07:00
reset
Merge tag 'soc-late-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
2026-04-23 08:57:24 -07:00
rpmsg
rpmsg: Constify buffer passed to send API
2026-04-06 09:37:51 -05:00
rtc
Merge tag 'rtc-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux
2026-04-25 16:39:03 -07:00
s390
Merge tag 's390-7.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
2026-04-22 11:13:45 -07:00
sbus
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scsi
Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
2026-04-21 08:22:18 -07:00
sh
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siox
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slimbus
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soc
Merge tag 'rpmsg-v7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux
2026-04-17 14:18:55 -07:00
soundwire
Merge tag 'soundwire-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/soundwire
2026-04-17 10:16:53 -07:00
spi
Merge tag 'spi-fix-v7.1-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
2026-04-24 13:16:36 -07:00
spmi
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ssb
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staging
media: meson: vdec: Fix memory leak in error path of vdec_open
2026-05-21 12:32:22 +02:00
target
Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
2026-04-21 08:22:18 -07:00
tc
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tee
Merge tag 'soc-drivers-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
2026-04-16 20:34:34 -07:00
thermal
Merge tag 'bitmap-for-v7.1' of https://github.com/norov/linux
2026-04-14 08:55:18 -07:00
thunderbolt
Merge tag 'thunderbolt-for-v7.1-rc1' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/westeri/thunderbolt into usb-next
2026-04-10 13:10:28 +02:00
tty
Merge tag 'tty-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
2026-04-19 08:44:41 -07:00
ufs
scsi: ufs: core: Disable timestamp for Kioxia THGJFJT0E25BAIP
2026-04-08 22:27:16 -04:00
uio
uio: replace deprecated mmap hook with mmap_prepare in uio_info
2026-04-05 13:53:44 -07:00
usb
Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
2026-04-21 08:22:18 -07:00
vdpa
vdpa: use generic driver_override infrastructure
2026-04-04 00:47:50 +02:00
vfio
vfio/cdx: Consolidate MSI configured state onto cdx_irqs
2026-04-21 12:01:22 -06:00
vhost
Merge tag 'net-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2026-04-23 16:50:42 -07:00
video
fbdev: hgafb: Request memory region before ioremap
2026-04-22 17:02:55 +02:00
virt
Merge tag 'tsm-for-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/devsec/tsm
2026-04-26 09:51:29 -07:00
virtio
Merge tag 'mm-stable-2026-04-13-21-45' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2026-04-15 12:59:16 -07:00
w1
w1: ds2490: drop redundant device reference
2026-04-03 10:55:12 +02:00
watchdog
watchdog: ni903x_wdt: Convert to a platform driver
2026-04-07 21:06:59 +02:00
xen
Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
2026-04-21 08:22:18 -07:00
zorro
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Kconfig
net: remove ISDN subsystem and Bluetooth CMTP
2026-04-23 10:24:02 -07:00
Makefile
net: remove ISDN subsystem and Bluetooth CMTP
2026-04-23 10:24:02 -07:00