diff options
Diffstat (limited to 'sound/core/seq/seq_timer.c')
| -rw-r--r-- | sound/core/seq/seq_timer.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/sound/core/seq/seq_timer.c b/sound/core/seq/seq_timer.c index 4cd7211ccf48..7b671e270ef4 100644 --- a/sound/core/seq/seq_timer.c +++ b/sound/core/seq/seq_timer.c @@ -61,12 +61,23 @@ struct snd_seq_timer *snd_seq_timer_new(void) void snd_seq_timer_delete(struct snd_seq_timer **tmr) { struct snd_seq_timer *t = *tmr; - *tmr = NULL; + struct snd_timer_instance *ti; if (t == NULL) { pr_debug("ALSA: seq: snd_seq_timer_delete() called with NULL timer\n"); return; } + + scoped_guard(spinlock_irq, &t->lock) { + ti = t->timeri; + t->timeri = NULL; + } + if (ti) { + snd_timer_close(ti); + snd_timer_instance_free(ti); + } + + *tmr = NULL; t->running = 0; /* reset time */ @@ -351,11 +362,10 @@ static int initialize_timer(struct snd_seq_timer *tmr) tmr->ticks = 1; if (!(t->hw.flags & SNDRV_TIMER_HW_SLAVE)) { unsigned long r = snd_timer_resolution(tmr->timeri); - if (r) { - tmr->ticks = (unsigned int)(1000000000uL / (r * freq)); - if (! tmr->ticks) - tmr->ticks = 1; - } + unsigned long den; + + if (r && !check_mul_overflow(r, freq, &den)) + tmr->ticks = max(1U, (unsigned int)(1000000000uL / den)); } tmr->initialized = 1; return 0; |