diff options
| author | Takashi Iwai <tiwai@suse.de> | 2015-07-14 15:19:37 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2015-07-14 15:19:37 +0200 |
| commit | 4d0e677523a999e1dec28e55cc314c47ba09ca12 (patch) | |
| tree | d96caef9f0fd2a74ccc7c681603c12d8ed06574e | |
| parent | d1f15e06b2af57228d11e33e06a172ff58f5bc1c (diff) | |
ALSA: line6: Fix -EBUSY error during active monitoring
When a monitor stream is active, the next PCM stream access results in
EBUSY error because of the check in line6_stream_start(). Fix this by
just skipping the submission of pending URBs when the stream is
already running instead.
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=101431
Cc: <stable@vger.kernel.org> # v4.0+
Signed-off-by: Takashi Iwai <tiwai@suse.de>
| -rw-r--r-- | sound/usb/line6/pcm.c | 9 |
1 files changed, 2 insertions, 7 deletions
diff --git a/sound/usb/line6/pcm.c b/sound/usb/line6/pcm.c index 8461d6bf992f..204cc074adb9 100644 --- a/sound/usb/line6/pcm.c +++ b/sound/usb/line6/pcm.c @@ -186,12 +186,8 @@ static int line6_stream_start(struct snd_line6_pcm *line6pcm, int direction, int ret = 0; spin_lock_irqsave(&pstr->lock, flags); - if (!test_and_set_bit(type, &pstr->running)) { - if (pstr->active_urbs || pstr->unlink_urbs) { - ret = -EBUSY; - goto error; - } - + if (!test_and_set_bit(type, &pstr->running) && + !(pstr->active_urbs || pstr->unlink_urbs)) { pstr->count = 0; /* Submit all currently available URBs */ if (direction == SNDRV_PCM_STREAM_PLAYBACK) @@ -199,7 +195,6 @@ static int line6_stream_start(struct snd_line6_pcm *line6pcm, int direction, else ret = line6_submit_audio_in_all_urbs(line6pcm); } - error: if (ret < 0) clear_bit(type, &pstr->running); spin_unlock_irqrestore(&pstr->lock, flags); |