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-rw-r--r--kernel/time/alarmtimer.c23
1 files changed, 22 insertions, 1 deletions
diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c
index 98ecf4e..59f369f 100644
--- a/kernel/time/alarmtimer.c
+++ b/kernel/time/alarmtimer.c
@@ -107,6 +107,9 @@ static struct rtc_device *alarmtimer_get_rtcdev(void)
return ret;
}
+#else
+#define alarmtimer_get_rtcdev() (0)
+#define rtcdev (0)
#endif
@@ -231,7 +234,7 @@ static int alarmtimer_suspend(struct device *dev)
freezer_delta = ktime_set(0, 0);
spin_unlock_irqrestore(&freezer_delta_lock, flags);
- rtc = alarmtimer_get_rtcdev();
+ rtc = rtcdev;
/* If we have no rtcdev, just return */
if (!rtc)
return 0;
@@ -381,6 +384,9 @@ static int alarm_clock_getres(const clockid_t which_clock, struct timespec *tp)
{
clockid_t baseid = alarm_bases[clock2alarm(which_clock)].base_clockid;
+ if (!alarmtimer_get_rtcdev())
+ return -ENOTSUPP;
+
return hrtimer_get_res(baseid, tp);
}
@@ -395,6 +401,9 @@ static int alarm_clock_get(clockid_t which_clock, struct timespec *tp)
{
struct alarm_base *base = &alarm_bases[clock2alarm(which_clock)];
+ if (!alarmtimer_get_rtcdev())
+ return -ENOTSUPP;
+
*tp = ktime_to_timespec(base->gettime());
return 0;
}
@@ -410,6 +419,9 @@ static int alarm_timer_create(struct k_itimer *new_timer)
enum alarmtimer_type type;
struct alarm_base *base;
+ if (!alarmtimer_get_rtcdev())
+ return -ENOTSUPP;
+
if (!capable(CAP_WAKE_ALARM))
return -EPERM;
@@ -444,6 +456,9 @@ static void alarm_timer_get(struct k_itimer *timr,
*/
static int alarm_timer_del(struct k_itimer *timr)
{
+ if (!rtcdev)
+ return -ENOTSUPP;
+
alarm_cancel(&timr->it.alarmtimer);
return 0;
}
@@ -461,6 +476,9 @@ static int alarm_timer_set(struct k_itimer *timr, int flags,
struct itimerspec *new_setting,
struct itimerspec *old_setting)
{
+ if (!rtcdev)
+ return -ENOTSUPP;
+
/* Save old values */
old_setting->it_interval =
ktime_to_timespec(timr->it.alarmtimer.period);
@@ -600,6 +618,9 @@ static int alarm_timer_nsleep(const clockid_t which_clock, int flags,
int ret = 0;
struct restart_block *restart;
+ if (!alarmtimer_get_rtcdev())
+ return -ENOTSUPP;
+
if (!capable(CAP_WAKE_ALARM))
return -EPERM;
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