commit de1b8b93a0ba016b07d13086a15ad692536e6995
tree 840f0b486009d1ddd5c38fd57bc49e2f749253a1
parent 282e0c87f223afbe8b182197eb06c127a66353ce
author Takashi Iwai <[EMAIL PROTECTED]> 1162996889 +0100
committer Jaroslav Kysela <[EMAIL PROTECTED]> 1164717998 +0100
[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 <[EMAIL PROTECTED]>
Signed-off-by: Jaroslav Kysela <[EMAIL PROTECTED]>
sound/core/oss/pcm_oss.c | 3 ++-
sound/core/pcm_native.c | 6 ++++--
sound/usb/usbaudio.c | 3 ++-
3 files changed, 8 insertions(+), 4 deletions(-)
diff --git a/sound/core/oss/pcm_oss.c b/sound/core/oss/pcm_oss.c
index 505b23e..e0821eb 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 in
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 37b4b10..66e24b5 100644
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -1310,7 +1310,8 @@ static int snd_pcm_pre_prepare(struct sn
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_s
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);
diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c
index c82b01c..67202b9 100644
--- a/sound/usb/usbaudio.c
+++ b/sound/usb/usbaudio.c
@@ -1469,7 +1469,8 @@ static int snd_usb_hw_free(struct snd_pc
subs->cur_audiofmt = NULL;
subs->cur_rate = 0;
subs->period_bytes = 0;
- release_substream_urbs(subs, 0);
+ if (!subs->stream->chip->shutdown)
+ release_substream_urbs(subs, 0);
return snd_pcm_free_vmalloc_buffer(substream);
}
-
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