@@ -747,6 +747,18 @@ static void snd_timer_process_callbacks(struct snd_timer *timer,
}
}
+/* clear pending instances from ack list */
+static void snd_timer_clear_callbacks(struct snd_timer *timer,
+ struct list_head *head)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&timer->lock, flags);
+ while (!list_empty(head))
+ list_del_init(head->next);
+ spin_unlock_irqrestore(&timer->lock, flags);
+}
+
/*
* timer tasklet
*
@@ -756,8 +768,10 @@ static void snd_timer_tasklet(unsigned long arg)
struct snd_timer *timer = (struct snd_timer *) arg;
unsigned long flags;
- if (timer->card && timer->card->shutdown)
+ if (timer->card && timer->card->shutdown) {
+ snd_timer_clear_callbacks(timer, &timer->sack_list_head);
return;
+ }
spin_lock_irqsave(&timer->lock, flags);
snd_timer_process_callbacks(timer, &timer->sack_list_head);
@@ -781,8 +795,10 @@ void snd_timer_interrupt(struct snd_timer * timer, unsigned long ticks_left)
if (timer == NULL)
return;
- if (timer->card && timer->card->shutdown)
+ if (timer->card && timer->card->shutdown) {
+ snd_timer_clear_callbacks(timer, &timer->ack_list_head);
return;
+ }
spin_lock_irqsave(&timer->lock, flags);
When a card is under disconnection, we bail out immediately at each timer interrupt or tasklet. This might leave some items left in ack list. For a better integration of the upcoming change to check ack_list emptiness, clear out the whole list upon the emergency exit route. Signed-off-by: Takashi Iwai <tiwai@suse.de> --- sound/core/timer.c | 20 ++++++++++++++++++-- 1 file changed, 18 insertions(+), 2 deletions(-)