rtc/m41t80: use rtc_valid_tm() to check returned tm

Use rtc_valid_tm() to check returned struct rtc_time *tm - it can avoid
returning wrong tm value.

Signed-off-by: Wan ZongShun <mcuos.com@gmail.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/rtc/rtc-m41t80.c b/drivers/rtc/rtc-m41t80.c
index 6dc4e6241418ac601a40abf5dfb0744401d44d5d..66377f3e28b851eaa908c6057a9646a639e9c229 100644 (file)
--- a/drivers/rtc/rtc-m41t80.c
+++ b/drivers/rtc/rtc-m41t80.c
@@ -121,7 +121,7 @@ static int m41t80_get_datetime(struct i2c_client *client,
 
        /* assume 20YY not 19YY, and ignore the Century Bit */
        tm->tm_year = bcd2bin(buf[M41T80_REG_YEAR]) + 100;
-       return 0;
+       return rtc_valid_tm(tm);
 }
 
 /* Sets the given date and time to the real time clock. */
@@ -364,7 +364,7 @@ static int m41t80_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *t)
        t->time.tm_isdst = -1;
        t->enabled = !!(reg[M41T80_REG_ALARM_MON] & M41T80_ALMON_AFE);
        t->pending = !!(reg[M41T80_REG_FLAGS] & M41T80_FLAGS_AF);
-       return 0;
+       return rtc_valid_tm(t);
 }
 
 static struct rtc_class_ops m41t80_rtc_ops = {