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path: root/drivers/rtc/interface.c
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Diffstat (limited to 'drivers/rtc/interface.c')
-rw-r--r--drivers/rtc/interface.c21
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c
index 5b2717f5dafa..45bfc28ee3aa 100644
--- a/drivers/rtc/interface.c
+++ b/drivers/rtc/interface.c
@@ -30,6 +30,14 @@ static int __rtc_read_time(struct rtc_device *rtc, struct rtc_time *tm)
else {
memset(tm, 0, sizeof(struct rtc_time));
err = rtc->ops->read_time(rtc->dev.parent, tm);
+ if (err < 0) {
+ dev_err(&rtc->dev, "read_time: fail to read\n");
+ return err;
+ }
+
+ err = rtc_valid_tm(tm);
+ if (err < 0)
+ dev_err(&rtc->dev, "read_time: rtc_time isn't valid\n");
}
return err;
}
@@ -891,11 +899,24 @@ again:
if (next) {
struct rtc_wkalrm alarm;
int err;
+ int retry = 3;
+
alarm.time = rtc_ktime_to_tm(next->expires);
alarm.enabled = 1;
+reprogram:
err = __rtc_set_alarm(rtc, &alarm);
if (err == -ETIME)
goto again;
+ else if (err) {
+ if (retry-- > 0)
+ goto reprogram;
+
+ timer = container_of(next, struct rtc_timer, node);
+ timerqueue_del(&rtc->timerqueue, &timer->node);
+ timer->enabled = 0;
+ dev_err(&rtc->dev, "__rtc_set_alarm: err=%d\n", err);
+ goto again;
+ }
} else
rtc_alarm_disable(rtc);