[PATCH] rtc: core: Prevent repeated calling of alarm_irq_enable().

[Jonghwa Lee]

This patch removes repeated execution of disabling alarm in
rtc_alarm_irq_enable() of rtc core interface. It made useless
call even all alarm had been disabled from rtc_timer_remove().
We'd better to skip disabling alarm when timer queue is empty.

Signed-off-by: Jonghwa Lee <jonghwa3.lee@xxxxxxxxxxx>
---
 drivers/rtc/interface.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c
index 9592b93..11cfb76 100644
--- a/drivers/rtc/interface.c
+++ b/drivers/rtc/interface.c
@@ -428,7 +428,7 @@ int rtc_alarm_irq_enable(struct rtc_device *rtc, unsigned int enabled)
 			rtc_timer_remove(rtc, &rtc->aie_timer);
 	}
 
-	if (err)
+	if (err || !rtc->timerqueue.next)
 		/* nothing */;
 	else if (!rtc->ops)
 		err = -ENODEV;
-- 
1.7.9.5

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