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| author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2011-06-29 09:49:04 -0700 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2011-06-29 09:49:04 -0700 |
| commit | 57cc2432e172b191db488ec8ad430b283807af0a (patch) | |
| tree | 09e673d9fbf593455ebf7048407aed4326f65bb7 /sound/soc/blackfin | |
| parent | 4e8e78e37c615e7904f51e62b5a06cb8fa3b3b53 (diff) | |
| parent | e999dc50404d401150a5429b6459473a691fd1a0 (diff) | |
| download | lwn-57cc2432e172b191db488ec8ad430b283807af0a.tar.gz lwn-57cc2432e172b191db488ec8ad430b283807af0a.zip | |
Merge branch 'for-3.0' into for-3.1
Diffstat (limited to 'sound/soc/blackfin')
| -rw-r--r-- | sound/soc/blackfin/bf5xx-i2s-pcm.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/sound/soc/blackfin/bf5xx-i2s-pcm.c b/sound/soc/blackfin/bf5xx-i2s-pcm.c index 4a805a859723..61ddf942fd4d 100644 --- a/sound/soc/blackfin/bf5xx-i2s-pcm.c +++ b/sound/soc/blackfin/bf5xx-i2s-pcm.c @@ -138,11 +138,20 @@ static snd_pcm_uframes_t bf5xx_pcm_pointer(struct snd_pcm_substream *substream) pr_debug("%s enter\n", __func__); if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { diff = sport_curr_offset_tx(sport); - frames = bytes_to_frames(substream->runtime, diff); } else { diff = sport_curr_offset_rx(sport); - frames = bytes_to_frames(substream->runtime, diff); } + + /* + * TX at least can report one frame beyond the end of the + * buffer if we hit the wraparound case - clamp to within the + * buffer as the ALSA APIs require. + */ + if (diff == snd_pcm_lib_buffer_bytes(substream)) + diff = 0; + + frames = bytes_to_frames(substream->runtime, diff); + return frames; } |