From bc59d7d4a0c3ab839cd8651ea639702d4d173a4b Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Tue, 30 Nov 2010 08:14:21 +0100 Subject: ALSA: Fix SNDCTL_DSP_RESET ioctl for OSS emulation commit 60686aa0086a14f8b15c83a09f3df1eebe3aab3c upstream. 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 Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman Signed-off-by: Andi Kleen --- sound/core/oss/pcm_oss.c | 19 +++++++++++-------- 1 file changed, 11 insertions(+), 8 deletions(-) (limited to 'sound') diff --git a/sound/core/oss/pcm_oss.c b/sound/core/oss/pcm_oss.c index 5c8c7dff8ed..aed06c90a96 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; } -- cgit v1.2.3-18-g5258