[PATCH] PM: wakelocks: Fix off-by-one in wakeup source limit

[Haowen Tu]

CONFIG_PM_WAKELOCKS_LIMIT is documented as the maximum number of
user-space wakeup sources. However, 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: b86ff9820fd5 ("PM / Sleep: Add user space interface for manipulating wakeup sources, v3")
Signed-off-by: Haowen Tu <tuhaowen@xxxxxxxxxxxxx>
---
 kernel/power/wakelock.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/power/wakelock.c b/kernel/power/wakelock.c
index fd763da06a87..a8b6bd5ec46b 100644
--- a/kernel/power/wakelock.c
+++ b/kernel/power/wakelock.c
@@ -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)
-- 
2.20.1