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PM: sleep: Fix off-by-one in wakelocks number limit check

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CONFIG_PM_WAKELOCKS_LIMIT is documented as the maximum number of
user-space wakeup sources, but the limit check is performed before
the counter is incremented and only rejects new wakeup sources when the
current number is greater than the limit. This allows one extra wakeup
source to be created.

Reject new wakeup sources once the counter has reached the limit.

Fixes: b86ff9820f ("PM / Sleep: Add user space interface for manipulating wakeup sources, v3")
Signed-off-by: Haowen Tu <tuhaowen@uniontech.com>
[ rjw: Subject edits ]
Link: https://patch.msgid.link/20260624053839.2150567-1-tuhaowen@uniontech.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Haowen Tu
2026-07-06 20:58:23 +02:00
committed by Rafael J. Wysocki
parent 8cdeaa50ea
commit 6058646587
1 changed files with 1 additions and 1 deletions
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kernel/power/wakelock.c
+1 -1
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@@ -63,7 +63,7 @@ static unsigned int number_of_wakelocks;
static inline bool wakelocks_limit_exceeded(void)
{
return number_of_wakelocks > CONFIG_PM_WAKELOCKS_LIMIT;
return number_of_wakelocks >= CONFIG_PM_WAKELOCKS_LIMIT;
}
static inline void increment_wakelocks_number(void)