PM: sleep: core: Avoid bit field races related to work_in_progress

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In all of the system suspend transition phases, the async processing of
a device may be carried out in parallel with power.work_in_progress
updates for the device's parent or suppliers and if it touches bit
fields from the same group (for example, power.must_resume or
power.wakeup_path), bit field corruption is possible.

To avoid that, turn work_in_progress in struct dev_pm_info into a proper
bool field and relocate it to save space.

Fixes: aa7a9275ab ("PM: sleep: Suspend async parents after suspending children")
Fixes: 443046d1ad ("PM: sleep: Make suspend of devices more asynchronous")
Signed-off-by: Xuewen Yan <xuewen.yan@unisoc.com>
Closes: https://lore.kernel.org/linux-pm/20260203063459.12808-1-xuewen.yan@unisoc.com/
Cc: All applicable <stable@vger.kernel.org>
[ rjw: Added subject and changelog ]
Link: https://patch.msgid.link/CAB8ipk_VX2VPm706Jwa1=8NSA7_btWL2ieXmBgHr2JcULEP76g@mail.gmail.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Xuewen Yan 2026-02-04 13:25:09 +01:00 • committed by Sasha Levin

parent 5ec1d82f00

commit 6c80b35076

1 changed files with 1 additions and 1 deletions

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include/linux/pm.h

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