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| author | Takashi Iwai <tiwai@suse.de> | 2010-11-30 08:14:21 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2010-11-30 08:18:58 +0100 |
| commit | 60686aa0086a14f8b15c83a09f3df1eebe3aab3c (patch) | |
| tree | 41920caaf33b3f669e169ff83fd06c3950ebc240 /sound/core | |
| parent | ac70eb1305d5a81efd1e32327d7e79be15a63a5a (diff) | |
| download | linux-60686aa0086a14f8b15c83a09f3df1eebe3aab3c.tar.gz linux-60686aa0086a14f8b15c83a09f3df1eebe3aab3c.tar.bz2 linux-60686aa0086a14f8b15c83a09f3df1eebe3aab3c.zip | |
ALSA: Fix SNDCTL_DSP_RESET ioctl for OSS emulation
In OSS emulation, SNDCTL_DSP_RESET ioctl needs the reset of the internal
buffer state in addition to drop of the running streams. Otherwise the
succeeding access becomes inconsistent.
Tested-by: Amit Nagal <helloin.amit@gmail.com>
Cc: <stable@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core')
| -rw-r--r-- | sound/core/oss/pcm_oss.c | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/sound/core/oss/pcm_oss.c b/sound/core/oss/pcm_oss.c index 5c8c7dff8ede..b753ec661fcf 100644 --- a/sound/core/oss/pcm_oss.c +++ b/sound/core/oss/pcm_oss.c @@ -1510,16 +1510,19 @@ static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __use static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file) { struct snd_pcm_substream *substream; + struct snd_pcm_runtime *runtime; + int i; - substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; - if (substream != NULL) { - snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); - substream->runtime->oss.prepare = 1; - } - substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; - if (substream != NULL) { + for (i = 0; i < 2; i++) { + substream = pcm_oss_file->streams[i]; + if (!substream) + continue; + runtime = substream->runtime; snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); - substream->runtime->oss.prepare = 1; + runtime->oss.prepare = 1; + runtime->oss.buffer_used = 0; + runtime->oss.prev_hw_ptr_period = 0; + runtime->oss.period_ptr = 0; } return 0; } |