diff options
Diffstat (limited to 'drivers/rtc')
-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) | |||
123 | err = mutex_lock_interruptible(&rtc->ops_lock); | 123 | err = mutex_lock_interruptible(&rtc->ops_lock); |
124 | if (err) | 124 | if (err) |
125 | return err; | 125 | return err; |
126 | alarm->enabled = rtc->aie_timer.enabled; | 126 | if (rtc->ops == NULL) |
127 | if (alarm->enabled) | 127 | err = -ENODEV; |
128 | else if (!rtc->ops->read_alarm) | ||
129 | err = -EINVAL; | ||
130 | else { | ||
131 | memset(alarm, 0, sizeof(struct rtc_wkalrm)); | ||
132 | alarm->enabled = rtc->aie_timer.enabled; | ||
128 | alarm->time = rtc_ktime_to_tm(rtc->aie_timer.node.expires); | 133 | alarm->time = rtc_ktime_to_tm(rtc->aie_timer.node.expires); |
134 | } | ||
129 | mutex_unlock(&rtc->ops_lock); | 135 | mutex_unlock(&rtc->ops_lock); |
130 | 136 | ||
131 | return 0; | 137 | return err; |
132 | } | 138 | } |
133 | EXPORT_SYMBOL_GPL(rtc_read_alarm); | 139 | EXPORT_SYMBOL_GPL(rtc_read_alarm); |
134 | 140 | ||