diff options
| -rw-r--r-- | kernel/power/suspend.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/kernel/power/suspend.c b/kernel/power/suspend.c index 1876abf1be15..6fae1e0a331c 100644 --- a/kernel/power/suspend.c +++ b/kernel/power/suspend.c @@ -95,8 +95,12 @@ static void s2idle_enter(void) * The correctness of the code below depends on the number of online * CPUs being stable, but CPUs cannot be taken offline or put online * while it is running. + * + * The s2idle_lock must be acquired before the pending wakeup check to + * prevent pm_system_wakeup() from running as a whole between that check + * and the subsequent s2idle_state update in which case a wakeup event + * would get lost. */ - raw_spin_lock_irq(&s2idle_lock); if (pm_wakeup_pending()) goto out; |