From: Takashi Iwai <tiwai@xxxxxxx>
commit 700cb70730777c159a988e01daa93f20a1ae9b58 upstream.
The PCM stop operation sets the stop_operating flag for indicating the
sync_stop post-process. This flag is, however, set unconditionally
even if the PCM trigger weren't issued. This may lead to
inconsistency in the driver side.
Correct the code to set stop_operating flag only after the trigger
STOP is actually called.
Fixes: 1e850beea278 ("ALSA: pcm: Add the support for sync-stop operation")
Cc: <stable@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20210206203656.15959-4-tiwai@xxxxxxx
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
sound/core/pcm_native.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
--- a/sound/core/pcm_native.c
+++ b/sound/core/pcm_native.c
@@ -1421,8 +1421,10 @@ static int snd_pcm_do_stop(struct snd_pc
snd_pcm_state_t state)
{
if (substream->runtime->trigger_master == substream &&
- snd_pcm_running(substream))
+ snd_pcm_running(substream)) {
substream->ops->trigger(substream, SNDRV_PCM_TRIGGER_STOP);
+ substream->runtime->stop_operating = true;
+ }
return 0; /* unconditonally stop all substreams */
}
@@ -1435,7 +1437,6 @@ static void snd_pcm_post_stop(struct snd
runtime->status->state = state;
snd_pcm_timer_notify(substream, SNDRV_TIMER_EVENT_MSTOP);
}
- runtime->stop_operating = true;
wake_up(&runtime->sleep);
wake_up(&runtime->tsleep);
}
