PCM hw_free and close should wait until all the pending stop operations have been finished. Basically only PCM trigger callback should use non-wait calls.
Signed-off-by: Takashi Iwai tiwai@suse.de --- sound/usb/pcm.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c index 4750d3d..bc3c9ac 100644 --- a/sound/usb/pcm.c +++ b/sound/usb/pcm.c @@ -446,7 +446,7 @@ static int configure_endpoint(struct snd_usb_substream *subs) int ret;
/* format changed */ - stop_endpoints(subs, false); + stop_endpoints(subs, true); ret = snd_usb_endpoint_set_params(subs->data_endpoint, subs->pcm_format, subs->channels, @@ -1012,7 +1012,7 @@ static int snd_usb_pcm_close(struct snd_pcm_substream *substream, int direction) struct snd_usb_stream *as = snd_pcm_substream_chip(substream); struct snd_usb_substream *subs = &as->substream[direction];
- stop_endpoints(subs, false); + stop_endpoints(subs, true);
if (!as->chip->shutdown && subs->interface >= 0) { usb_set_interface(subs->dev, subs->interface, 0);