diff options
| author | Takashi Iwai <tiwai@suse.de> | 2011-05-26 08:09:38 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2011-05-26 08:09:38 +0200 |
| commit | f2b3614cefb61ee6046a0aaee503ee37f227d310 (patch) | |
| tree | 4e43feacc58c629919d09bc6fd200ac0892d2cca /sound/core/pcm_native.c | |
| parent | a331b0c3665506aa23bfc78c777199b30349d731 (diff) | |
| download | linux-f2b3614cefb61ee6046a0aaee503ee37f227d310.tar.bz2 | |
ALSA: PCM - Don't check DMA time-out too shortly
When the PCM period size is set larger than 10 seconds, currently the
PCM core may abort the operation with DMA-error due to the fixed timeout
for 10 seconds. A similar problem is seen in the drain operation that
has a fixed timeout of 10 seconds, too.
This patch fixes the timeout length depending on the period size and
rate, also including the consideration of no_period_wakeup flag.
Reported-by: Raymond Yau <superquad.vortex2@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core/pcm_native.c')
| -rw-r--r-- | sound/core/pcm_native.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c index 1a07750f3836..b597408d5faa 100644 --- a/sound/core/pcm_native.c +++ b/sound/core/pcm_native.c @@ -1481,11 +1481,20 @@ static int snd_pcm_drain(struct snd_pcm_substream *substream, break; /* all drained */ init_waitqueue_entry(&wait, current); add_wait_queue(&to_check->sleep, &wait); - set_current_state(TASK_INTERRUPTIBLE); snd_pcm_stream_unlock_irq(substream); up_read(&snd_pcm_link_rwsem); snd_power_unlock(card); - tout = schedule_timeout(10 * HZ); + if (runtime->no_period_wakeup) + tout = MAX_SCHEDULE_TIMEOUT; + else { + tout = 10; + if (runtime->rate) { + long t = runtime->period_size * 2 / runtime->rate; + tout = max(t, tout); + } + tout = msecs_to_jiffies(tout * 1000); + } + tout = schedule_timeout_interruptible(tout); snd_power_lock(card); down_read(&snd_pcm_link_rwsem); snd_pcm_stream_lock_irq(substream); |