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| author | John Stultz <john.stultz@linaro.org> | 2011-01-20 15:26:13 -0800 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2011-01-21 17:38:19 +0100 |
| commit | d5553a556165535337ece8592f066407c62eec2e (patch) | |
| tree | 2b9eaf6a5b9a4939f92cadedf6c797070107e7af /drivers/rtc/interface.c | |
| parent | aa0be0f4659f91f31e45adc422b1788cb36ffddc (diff) | |
| download | linux-d5553a556165535337ece8592f066407c62eec2e.tar.gz linux-d5553a556165535337ece8592f066407c62eec2e.tar.bz2 linux-d5553a556165535337ece8592f066407c62eec2e.zip | |
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>
Diffstat (limited to 'drivers/rtc/interface.c')
| -rw-r--r-- | drivers/rtc/interface.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c index f1ba2c696528..925006d33109 100644 --- a/drivers/rtc/interface.c +++ b/drivers/rtc/interface.c @@ -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; - alarm->enabled = rtc->aie_timer.enabled; - if (alarm->enabled) + 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; 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); |