diff options
| author | Takashi Iwai <tiwai@suse.de> | 2012-11-08 11:52:45 +0400 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2012-11-08 11:56:44 +0400 |
| commit | f58161ba1b05a968e5136824b5a16b714b6a5317 (patch) | |
| tree | 66a8547463d97e87224b1192135a5921b70e3027 /sound/usb/endpoint.h | |
| parent | d1a3c98d50731c627909029bb653a0557946f0f5 (diff) | |
| download | linux-f58161ba1b05a968e5136824b5a16b714b6a5317.tar.xz | |
ALSA: usb-audio: Fix crash at re-preparing the PCM stream
There are bug reports of a crash with USB-audio devices when PCM
prepare is performed immediately after the stream is stopped via
trigger callback. It turned out that the problem is that we don't
wait until all URBs are killed.
This patch adds a new function to synchronize the pending stop
operation on an endpoint, and calls in the prepare callback for
avoiding the crash above.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=49181
Reported-and-tested-by: Artem S. Tashkinov <t.artem@lycos.com>
Cc: <stable@vger.kernel.org> [v3.6]
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb/endpoint.h')
| -rw-r--r-- | sound/usb/endpoint.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/sound/usb/endpoint.h b/sound/usb/endpoint.h index 6376ccf10fd4..3d4c9705041f 100644 --- a/sound/usb/endpoint.h +++ b/sound/usb/endpoint.h @@ -19,6 +19,7 @@ int snd_usb_endpoint_set_params(struct snd_usb_endpoint *ep, int snd_usb_endpoint_start(struct snd_usb_endpoint *ep, int can_sleep); void snd_usb_endpoint_stop(struct snd_usb_endpoint *ep, int force, int can_sleep, int wait); +void snd_usb_endpoint_sync_pending_stop(struct snd_usb_endpoint *ep); int snd_usb_endpoint_activate(struct snd_usb_endpoint *ep); int snd_usb_endpoint_deactivate(struct snd_usb_endpoint *ep); void snd_usb_endpoint_free(struct list_head *head); |