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authorTakashi Iwai <tiwai@suse.de>2006-11-08 15:41:29 +0100
committerJaroslav Kysela <perex@suse.cz>2006-11-28 13:46:38 +0100
commitde1b8b93a0ba016b07d13086a15ad692536e6995 (patch)
tree840f0b486009d1ddd5c38fd57bc49e2f749253a1 /sound/core
parent282e0c87f223afbe8b182197eb06c127a66353ce (diff)
[ALSA] Fix hang-up at disconnection of usb-audio
Fix hang-up at disconnection of usb-audio devices while accessing PCM. Don't handle PCM operations any more after shutdown flag is set. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Diffstat (limited to 'sound/core')
-rw-r--r--sound/core/oss/pcm_oss.c3
-rw-r--r--sound/core/pcm_native.c6
2 files changed, 6 insertions, 3 deletions
diff --git a/sound/core/oss/pcm_oss.c b/sound/core/oss/pcm_oss.c
index 505b23ec4058..e0821eb3d851 100644
--- a/sound/core/oss/pcm_oss.c
+++ b/sound/core/oss/pcm_oss.c
@@ -2359,7 +2359,8 @@ static int snd_pcm_oss_release(struct inode *inode, struct file *file)
substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
snd_assert(substream != NULL, return -ENXIO);
pcm = substream->pcm;
- snd_pcm_oss_sync(pcm_oss_file);
+ if (!pcm->card->shutdown)
+ snd_pcm_oss_sync(pcm_oss_file);
mutex_lock(&pcm->open_mutex);
snd_pcm_oss_release_file(pcm_oss_file);
mutex_unlock(&pcm->open_mutex);
diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
index 37b4b10850ae..66e24b5da469 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -1310,7 +1310,8 @@ static int snd_pcm_pre_prepare(struct snd_pcm_substream *substream,
int f_flags)
{
struct snd_pcm_runtime *runtime = substream->runtime;
- if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
+ if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
+ runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
return -EBADFD;
if (snd_pcm_running(substream))
return -EBUSY;
@@ -1568,7 +1569,8 @@ static int snd_pcm_drop(struct snd_pcm_substream *substream)
runtime = substream->runtime;
card = substream->pcm->card;
- if (runtime->status->state == SNDRV_PCM_STATE_OPEN)
+ if (runtime->status->state == SNDRV_PCM_STATE_OPEN ||
+ runtime->status->state == SNDRV_PCM_STATE_DISCONNECTED)
return -EBADFD;
snd_power_lock(card);