Commit d5553a55 authored Jan 20, 2011 by John Stultz Committed by Thomas Gleixner Jan 21, 2011

RTC: Properly handle rtc_read_alarm error propagation and fix bug



In reviewing cases where the virtualized interfaces didn't propagate
errors properly, I noticed rtc_read_alarm needed fixing. In doing
so I noticed my RTC rework dropped a memset and that the behavior
of rtc_read_alarm shouldn't be conditionalized on the alarm.enabled
flag (as the alarm may be set, but the irqs may be disabled). So
those were corrected as well.

CC: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Stultz <john.stultz@linaro.org>
LKML-Reference: <1295565973-14358-2-git-send-email-john.stultz@linaro.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

parent aa0be0f4

drivers/rtc/interface.c

+9 −3

Original line number	Diff line number	Diff line
		@@ -123,12 +123,18 @@ int rtc_read_alarm(struct rtc_device rtc, struct rtc_wkalrm alarm)
		err = mutex_lock_interruptible(&rtc->ops_lock);
		if (err)
		return err;
		if (rtc->ops == NULL)
		err = -ENODEV;
		else if (!rtc->ops->read_alarm)
		err = -EINVAL;
		else {
		memset(alarm, 0, sizeof(struct rtc_wkalrm));
		alarm->enabled = rtc->aie_timer.enabled;
		if (alarm->enabled)
		alarm->time = rtc_ktime_to_tm(rtc->aie_timer.node.expires);
		}
		mutex_unlock(&rtc->ops_lock);

		return 0;
		return err;
		}
		EXPORT_SYMBOL_GPL(rtc_read_alarm);