rtc: Factor out the RTC range validation into rtc_valid_range()

The RTC range validation code can be factored into rtc_valid_range()
function to avoid duplicate code.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

1 files changed, 18 insertions, 12 deletions

diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c
index c068daebeec2..25aebc5b448d 100644
--- a/drivers/rtc/interface.c
+++ b/drivers/rtc/interface.c
@@ -23,6 +23,18 @@
 static int rtc_timer_enqueue(struct rtc_device *rtc, struct rtc_timer *timer);
 static void rtc_timer_remove(struct rtc_device *rtc, struct rtc_timer *timer);
 
+static int rtc_valid_range(struct rtc_device *rtc, struct rtc_time *tm)
+{
+        if (rtc->range_min != rtc->range_max) {
+                time64_t time = rtc_tm_to_time64(tm);
+
+                if (time < rtc->range_min || time > rtc->range_max)
+                        return -ERANGE;
+        }
+
+        return 0;
+}
+
 static int __rtc_read_time(struct rtc_device *rtc, struct rtc_time *tm)
 {
         int err;
@@ -70,12 +82,9 @@ int rtc_set_time(struct rtc_device *rtc, struct rtc_time *tm)
         if (err != 0)
                 return err;
 
-        if (rtc->range_min != rtc->range_max) {
-                time64_t time = rtc_tm_to_time64(tm);
-
-                if (time < rtc->range_min || time > rtc->range_max)
-                        return -ERANGE;
-        }
+        err = rtc_valid_range(rtc, tm);
+        if (err)
+                return err;
 
         err = mutex_lock_interruptible(&rtc->ops_lock);
         if (err)
@@ -381,12 +390,9 @@ int rtc_set_alarm(struct rtc_device *rtc, struct rtc_wkalrm *alarm)
         if (err != 0)
                 return err;
 
-        if (rtc->range_min != rtc->range_max) {
-                time64_t time = rtc_tm_to_time64(&alarm->time);
-
-                if (time < rtc->range_min || time > rtc->range_max)
-                        return -ERANGE;
-        }
+        err = rtc_valid_range(rtc, &alarm->time);
+        if (err)
+                return err;
 
         err = mutex_lock_interruptible(&rtc->ops_lock);
         if (err)