diff options
Diffstat (limited to 'drivers/clocksource')
| -rw-r--r-- | drivers/clocksource/samsung_pwm_timer.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/clocksource/samsung_pwm_timer.c b/drivers/clocksource/samsung_pwm_timer.c index 92b2f130ae9b..0234c8d2c8f2 100644 --- a/drivers/clocksource/samsung_pwm_timer.c +++ b/drivers/clocksource/samsung_pwm_timer.c @@ -176,6 +176,19 @@ static void samsung_time_start(unsigned int channel, bool periodic) static int samsung_set_next_event(unsigned long cycles, struct clock_event_device *evt) { + /* + * This check is needed to account for internal rounding + * errors inside clockevents core, which might result in + * passing cycles = 0, which in turn would not generate any + * timer interrupt and hang the system. + * + * Another solution would be to set up the clockevent device + * with min_delta = 2, but this would unnecessarily increase + * the minimum sleep period. + */ + if (!cycles) + cycles = 1; + samsung_time_setup(pwm.event_id, cycles); samsung_time_start(pwm.event_id, false); |