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authorTakashi Iwai <tiwai@suse.de>2017-10-11 12:42:00 +0300
committerTakashi Iwai <tiwai@suse.de>2017-10-18 09:05:46 +0300
commit6ca73de7ebc5dac358551633e0c69ab6b5007baa (patch)
tree4e8b68dbeec41bd449750b60c25bb66486c17c96 /sound/core
parent8b645e4a40dd490b9426670fffe9bb9e2878c3fd (diff)
downloadlinux-6ca73de7ebc5dac358551633e0c69ab6b5007baa.tar.xz
ALSA: pcm: Forcibly stop at disconnect callback
So far we assumed that each driver implements the hotplug PCM handling properly, e.g. dealing with the pending PCM stream at disconnect callback. But most codes don't care, and it eventually leaves the PCM stream inconsistent state when an abrupt disconnection like sysfs unbind happens. This patch is simple but a big-hammer solution: invoke snd_pcm_stop() at the common PCM disconnect callback always when the stream is running. Tested-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core')
-rw-r--r--sound/core/pcm.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/sound/core/pcm.c b/sound/core/pcm.c
index 1b073ed0b1f9..9070f277f8db 100644
--- a/sound/core/pcm.c
+++ b/sound/core/pcm.c
@@ -1154,6 +1154,10 @@ static int snd_pcm_dev_disconnect(struct snd_device *device)
for (substream = pcm->streams[cidx].substream; substream; substream = substream->next) {
snd_pcm_stream_lock_irq(substream);
if (substream->runtime) {
+ if (snd_pcm_running(substream))
+ snd_pcm_stop(substream,
+ SNDRV_PCM_STATE_DISCONNECTED);
+ /* to be sure, set the state unconditionally */
substream->runtime->status->state = SNDRV_PCM_STATE_DISCONNECTED;
wake_up(&substream->runtime->sleep);
wake_up(&substream->runtime->tsleep);