diff options
| author | Xuewen Yan <xuewen.yan@unisoc.com> | 2026-02-04 13:25:09 +0100 |
|---|---|---|
| committer | Sasha Levin <sashal@kernel.org> | 2026-03-12 07:09:32 -0400 |
| commit | 6c80b35076bcf4e2d43be0f81d61926211b8959d (patch) | |
| tree | db65ebe7f4ecaf0a49e3260bf6045088566e1922 /include | |
| parent | 5ec1d82f00b1c2d928304b8342b8c572cbcbe6fd (diff) | |
PM: sleep: core: Avoid bit field races related to work_in_progress
[ Upstream commit 0491f3f9f664e7e0131eb4d2a8b19c49562e5c64 ]
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: aa7a9275ab81 ("PM: sleep: Suspend async parents after suspending children")
Fixes: 443046d1ad66 ("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>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/pm.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/pm.h b/include/linux/pm.h index cc7b2dc28574..12782f775a17 100644 --- a/include/linux/pm.h +++ b/include/linux/pm.h @@ -677,10 +677,10 @@ struct dev_pm_info { struct list_head entry; struct completion completion; struct wakeup_source *wakeup; + bool work_in_progress; /* Owned by the PM core */ bool wakeup_path:1; bool syscore:1; bool no_pm_callbacks:1; /* Owned by the PM core */ - bool work_in_progress:1; /* Owned by the PM core */ bool smart_suspend:1; /* Owned by the PM core */ bool must_resume:1; /* Owned by the PM core */ bool may_skip_resume:1; /* Set by subsystems */ |