Rafael J. Wysocki 80dd33cf72 drivers: base: Fix device link removal ... When device_link_free() drops references to the supplier and consumer devices of the device link going away and the reference being dropped turns out to be the last one for any of those device objects, its ->release callback will be invoked and it may sleep which goes against the SRCU callback execution requirements. To address this issue, make the device link removal code carry out the device_link_free() actions preceded by SRCU synchronization from a separate work item (the "long" workqueue is used for that, because it does not matter when the device link memory is released and it may take time to get to that point) instead of using SRCU callbacks. While at it, make the code work analogously when SRCU is not enabled to reduce the differences between the SRCU and non-SRCU cases. Fixes: 843e600b8a ("driver core: Fix sleeping in invalid context during device link deletion") Cc: stable <stable@vger.kernel.org> Reported-by: chenxiang (M) <chenxiang66@hisilicon.com> Tested-by: chenxiang (M) <chenxiang66@hisilicon.com> Reviewed-by: Saravana Kannan <saravanak@google.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Link: https://lore.kernel.org/r/5722787.lOV4Wx5bFT@kreacher Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2021-05-21 22:12:09 +02:00
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acpi
asm-generic	mm: remove xlate_dev_kmem_ptr()	2021-05-07 00:26:34 -07:00
clocksource
crypto
drm
dt-bindings	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2021-05-06 23:37:55 -07:00
keys	integrity-v5.13	2021-05-01 15:32:18 -07:00
kunit
kvm
linux	drivers: base: Fix device link removal	2021-05-21 22:12:09 +02:00
math-emu
media
memory
misc
net	mm: fix struct page layout on 32-bit systems	2021-05-14 19:41:32 -07:00
pcmcia
ras
rdma
scsi
soc
sound
target
trace	NFS client updates for Linux 5.13	2021-05-07 11:23:41 -07:00
uapi	block-5.13-2021-05-14	2021-05-15 08:52:30 -07:00
vdso
video
xen	xen/arm: move xen_swiotlb_detect to arm/swiotlb-xen.h	2021-05-14 15:52:05 +02:00