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drivers/rtc/interface.c: check the error after __rtc_read_time()

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In __rtc_set_alarm(), the error after __rtc_read_time() is not checked.
If rtc device fail to read time, we cannot guarantee the following
process.

Add the verification code for returned __rtc_read_time() error.

Signed-off-by: Hyogi Gim <[email protected]>
Acked-by: Alessandro Zummo <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Hyogi Gim 2014-08-08 14:20:11 -07:00 • committed by Linus Torvalds
commit ca6dc2dab9
1 changed files with 2 additions and 0 deletions
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2
drivers/rtc/interface.c
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@ -348,6 +348,8 @@ static int __rtc_set_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm)
/* Make sure we're not setting alarms in the past */
err = __rtc_read_time(rtc, &tm);
if (err)
return err;
rtc_tm_to_time(&tm, &now);
if (scheduled <= now)
return -ETIME;