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authorTakashi Iwai <tiwai@suse.de>2009-05-27 10:49:26 +0200
committerTakashi Iwai <tiwai@suse.de>2009-05-27 11:04:18 +0200
commit6af3fb72d2437239e5eb13a59e95dc43ccab3e8f (patch)
treea34f63d4c1904b2cff6a10926364c8ed557bb8c2 /sound
parent59a3759d0fe8d969888c741bb33f4946e4d3750d (diff)
downloadlinux-6af3fb72d2437239e5eb13a59e95dc43ccab3e8f.tar.bz2
ALSA: Fix invalid jiffies check after pause
The hw_ptr_jiffies has to be reset properly to avoid the invalid check of jiffies delta in snd_pcm_update_hw_ptr*() functions. Especailly this patch fixes the bogus jiffies check after the puase and resume. This patch is a modified version of the original patch by Jaroslav. Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
-rw-r--r--sound/core/pcm_lib.c1
-rw-r--r--sound/core/pcm_native.c6
2 files changed, 6 insertions, 1 deletions
diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c
index a2a792c18c40..3eea98a4e65a 100644
--- a/sound/core/pcm_lib.c
+++ b/sound/core/pcm_lib.c
@@ -1478,7 +1478,6 @@ static int snd_pcm_lib_ioctl_reset(struct snd_pcm_substream *substream,
runtime->status->hw_ptr %= runtime->buffer_size;
else
runtime->status->hw_ptr = 0;
- runtime->hw_ptr_jiffies = jiffies;
snd_pcm_stream_unlock_irqrestore(substream, flags);
return 0;
}
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index fc6f98e257df..b5da656d1ece 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -848,6 +848,7 @@ static void snd_pcm_post_start(struct snd_pcm_substream *substream, int state)
{
struct snd_pcm_runtime *runtime = substream->runtime;
snd_pcm_trigger_tstamp(substream);
+ runtime->hw_ptr_jiffies = jiffies;
runtime->status->state = state;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
runtime->silence_size > 0)
@@ -961,6 +962,11 @@ static int snd_pcm_do_pause(struct snd_pcm_substream *substream, int push)
{
if (substream->runtime->trigger_master != substream)
return 0;
+ /* The jiffies check in snd_pcm_update_hw_ptr*() is done by
+ * a delta betwen the current jiffies, this gives a large enough
+ * delta, effectively to skip the check once.
+ */
+ substream->runtime->hw_ptr_jiffies = jiffies - HZ * 1000;
return substream->ops->trigger(substream,
push ? SNDRV_PCM_TRIGGER_PAUSE_PUSH :
SNDRV_PCM_TRIGGER_PAUSE_RELEASE);