diff options
| -rw-r--r-- | kernel/hrtimer.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c index 281842251bfa..db565327c24e 100644 --- a/kernel/hrtimer.c +++ b/kernel/hrtimer.c @@ -803,6 +803,9 @@ u64 hrtimer_forward(struct hrtimer *timer, ktime_t now, ktime_t interval) if (delta.tv64 < 0) return 0; + if (WARN_ON(timer->state & HRTIMER_STATE_ENQUEUED)) + return 0; + if (interval.tv64 < timer->base->resolution.tv64) interval.tv64 = timer->base->resolution.tv64; @@ -1229,11 +1232,14 @@ static void __run_hrtimer(struct hrtimer *timer, ktime_t *now) * Note: We clear the CALLBACK bit after enqueue_hrtimer and * we do not reprogramm the event hardware. Happens either in * hrtimer_start_range_ns() or in hrtimer_interrupt() + * + * Note: Because we dropped the cpu_base->lock above, + * hrtimer_start_range_ns() can have popped in and enqueued the timer + * for us already. */ - if (restart != HRTIMER_NORESTART) { - BUG_ON(timer->state != HRTIMER_STATE_CALLBACK); + if (restart != HRTIMER_NORESTART && + !(timer->state & HRTIMER_STATE_ENQUEUED)) enqueue_hrtimer(timer, base); - } WARN_ON_ONCE(!(timer->state & HRTIMER_STATE_CALLBACK)); |