Rafael J. Wysocki d007150b4e drivers: base: Fix device link removal ... commit 80dd33cf72d1ab4f0af303f1fa242c6d6c8d328f upstream. 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>		2021-06-03 09:00:34 +02:00
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firmware_loader	Char/Misc driver patches for 5.10-rc1	2020-10-15 10:01:51 -07:00
power	PM: runtime: Fix unpaired parent child_count for force_resume	2021-05-19 10:12:51 +02:00
regmap	regmap: set debugfs_name to NULL after it is freed	2021-05-14 09:50:09 +02:00
test	drivers/base: build kunit tests without structleak plugin	2021-03-17 17:06:24 +01:00
arch_topology.c	Driver Core patches for 5.10-rc1	2020-10-14 16:09:32 -07:00
attribute_container.c
base.h
bus.c
cacheinfo.c
class.c
component.c
container.c
core.c	drivers: base: Fix device link removal	2021-06-03 09:00:34 +02:00
cpu.c
dd.c	driver core: Fix locking bug in deferred_probe_timeout_work_func()	2021-04-14 08:42:03 +02:00
devcoredump.c
devres.c
devtmpfs.c	devtmpfs: fix placement of complete() call	2021-05-14 09:50:11 +02:00
driver.c
firmware.c
hypervisor.c
init.c
isa.c
Kconfig
Makefile
map.c
memory.c	drivers/base/memory: don't store phys_device in memory blocks	2021-03-17 17:06:25 +01:00
module.c
node.c	node: fix device cleanups in error handling code	2021-05-14 09:50:19 +02:00
pinctrl.c
platform-msi.c
platform.c
property.c
soc.c
swnode.c	software node: Fix node registration	2021-03-17 17:06:28 +01:00
syscore.c
topology.c
transport_class.c