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PM / sleep: Return -EBUSY from suspend_enter() on wakeup detection 

If a wakeup source is found to be pending in the last stage of
suspend after syscore suspend, then the machine won't suspend, but
suspend_enter() will return 0.  That is confusing, as wakeup detection
elsewhere causes -EBUSY to be returned from suspend_enter().

To avoid the confusion, make suspend_enter() return -EBUSY in that
case too.

Signed-off-by: Ruchi Kandoi <kandoiruchi@google.com>
[ rjw: Subject and changelog ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
hifive-unleashed-5.1
Ruchi Kandoi 2015-05-07 19:07:42 -07:00 committed by Rafael J. Wysocki
parent 75e0678e70
commit 671767360d
1 changed files with 2 additions and 0 deletions
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2
kernel/power/suspend.c
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@ -366,6 +366,8 @@ static int suspend_enter(suspend_state_t state, bool *wakeup)
trace_suspend_resume(TPS("machine_suspend"),
state, false);
events_check_enabled = false;
} else if (*wakeup) {
error = -EBUSY;
}
syscore_resume();
}