From de1b8b93a0ba016b07d13086a15ad692536e6995 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Wed, 8 Nov 2006 15:41:29 +0100 Subject: [PATCH] [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 Signed-off-by: Jaroslav Kysela --- 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 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 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 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); 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_pcm_substream *substream) 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); } -- 1.8.2.3