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ALSA: usb-audio: Don't avoid stopping the stream at disconnection

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commit 257d2d7e9e798305d65825cb82b0a7d1c0511e89 upstream

In the later patch, we're going to issue the PCM sync_stop calls at
disconnection.  But currently the USB-audio driver can't handle it
because it has a check of shutdown flag for stopping the URBs.  This
is basically superfluous (the stopping URBs are safe at disconnection
state), so let's drop the check.

Fixes: dc5eafe778 ("ALSA: usb-audio: Support PCM sync_stop")
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210206203052.15606-4-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
[sudip: adjust context]
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Takashi Iwai 2021-02-06 21:30:52 +01:00 committed by Greg Kroah-Hartman
parent df8596f577
commit 0f6cab2350
2 changed files with 1 additions and 7 deletions
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3
sound/usb/endpoint.c
View File

@ -576,9 +576,6 @@ static int deactivate_urbs(struct snd_usb_endpoint *ep, bool force)
{
unsigned int i;
if (!force && atomic_read(&ep->chip->shutdown)) /* to be sure... */
return -EBADFD;
clear_bit(EP_FLAG_RUNNING, &ep->flags);
INIT_LIST_HEAD(&ep->ready_playback_urbs);

5
sound/usb/pcm.c
View File

@ -280,10 +280,7 @@ static int snd_usb_pcm_sync_stop(struct snd_pcm_substream *substream)
{
struct snd_usb_substream *subs = substream->runtime->private_data;
if (!snd_usb_lock_shutdown(subs->stream->chip)) {
sync_pending_stops(subs);
snd_usb_unlock_shutdown(subs->stream->chip);
}
sync_pending_stops(subs);
return 0;
}