diff options
| author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2010-11-01 13:58:18 -0400 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2010-11-01 13:58:18 -0400 |
| commit | 6e1bd1ab1d9ab8e83cdc940df82fbf8418e2593f (patch) | |
| tree | f1324a39f155375221ed88db0626f61b75c51db6 /sound/core/pcm_lib.c | |
| parent | fec6dd833e733b5d9588a1f1e4d81118b79b5774 (diff) | |
| parent | 76a6106f124e375df0ea6ba6bcf204b8caff786a (diff) | |
Merge branch 'for-2.6.37' into for-2.6.38
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 */ |