rtc: fix handling of missing tm_year data when reading alarms

When fixing up invalid years rtc_read_alarm() was calling rtc_valid_tm()
as a boolean but rtc_valid_tm() returns zero on success or a negative
number if the time is not valid so the test was inverted.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Alessandro Zummo <a.zummo@towertech.it>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c
index 7af60b98d8a4..a04c1b6b1575 100644
--- a/drivers/rtc/interface.c
+++ b/drivers/rtc/interface.c
@@ -271,7 +271,7 @@ int rtc_read_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm)
                 dev_dbg(&rtc->dev, "alarm rollover: %s\n", "year");
                 do {
                         alarm->time.tm_year++;
-                } while (!rtc_valid_tm(&alarm->time));
+                } while (rtc_valid_tm(&alarm->time) != 0);
                 break;
 
         default: