diff options
| author | Takashi Iwai <tiwai@suse.de> | 2010-10-25 09:56:32 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2010-10-25 09:56:32 +0200 |
| commit | 79fc84c7e0d2fe89c4e82f3a26fd8b0d13c31703 (patch) | |
| tree | e32a4c267dc1b5950012e18c1e71d8057140f1f5 /sound/core/pcm_lib.c | |
| parent | f6f94e2ab1b33f0082ac22d71f66385a60d8157f (diff) | |
| parent | 97c44b2dbd0060e2e6bd56236eb638ab02ec7f30 (diff) | |
Merge branch 'topic/misc' into for-linus
Diffstat (limited to 'sound/core/pcm_lib.c')
| -rw-r--r-- | sound/core/pcm_lib.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/sound/core/pcm_lib.c b/sound/core/pcm_lib.c index e23e0e7ab26..a1707cca9c6 100644 --- a/sound/core/pcm_lib.c +++ b/sound/core/pcm_lib.c @@ -334,11 +334,15 @@ static int snd_pcm_update_hw_ptr0(struct snd_pcm_substream *substream, /* delta = "expected next hw_ptr" for in_interrupt != 0 */ delta = runtime->hw_ptr_interrupt + runtime->period_size; if (delta > new_hw_ptr) { - hw_base += runtime->buffer_size; - if (hw_base >= runtime->boundary) - hw_base = 0; - new_hw_ptr = hw_base + pos; - goto __delta; + /* check for double acknowledged interrupts */ + hdelta = jiffies - runtime->hw_ptr_jiffies; + if (hdelta > runtime->hw_ptr_buffer_jiffies/2) { + hw_base += runtime->buffer_size; + if (hw_base >= runtime->boundary) + hw_base = 0; + new_hw_ptr = hw_base + pos; + goto __delta; + } } } /* new_hw_ptr might be lower than old_hw_ptr in case when */ |