Commit b9e2fa1e authored by Charles Keepax's avatar Charles Keepax Committed by Greg Kroah-Hartman

ALSA: compress: Fix regression on compressed capture streams

[ Upstream commit 4475f8c4 ]

A previous fix to the stop handling on compressed capture streams causes
some knock on issues. The previous fix updated snd_compr_drain_notify to
set the state back to PREPARED for capture streams. This causes some
issues however as the handling for snd_compr_poll differs between the
two states and some user-space applications were relying on the poll
failing after the stream had been stopped.

To correct this regression whilst still fixing the original problem the
patch was addressing, update the capture handling to skip the PREPARED
state rather than skipping the SETUP state as it has done until now.

Fixes: 4f2ab5e1 ("ALSA: compress: Fix stop handling on compressed capture streams")
Signed-off-by: default avatarCharles Keepax <ckeepax@opensource.cirrus.com>
Acked-by: default avatarVinod Koul <vkoul@kernel.org>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
parent 77868c00
......@@ -171,10 +171,7 @@ static inline void snd_compr_drain_notify(struct snd_compr_stream *stream)
if (snd_BUG_ON(!stream))
return;
if (stream->direction == SND_COMPRESS_PLAYBACK)
stream->runtime->state = SNDRV_PCM_STATE_SETUP;
else
stream->runtime->state = SNDRV_PCM_STATE_PREPARED;
stream->runtime->state = SNDRV_PCM_STATE_SETUP;
wake_up(&stream->runtime->sleep);
}
......
......@@ -575,10 +575,7 @@ snd_compr_set_params(struct snd_compr_stream *stream, unsigned long arg)
stream->metadata_set = false;
stream->next_track = false;
if (stream->direction == SND_COMPRESS_PLAYBACK)
stream->runtime->state = SNDRV_PCM_STATE_SETUP;
else
stream->runtime->state = SNDRV_PCM_STATE_PREPARED;
stream->runtime->state = SNDRV_PCM_STATE_SETUP;
} else {
return -EPERM;
}
......@@ -694,8 +691,17 @@ static int snd_compr_start(struct snd_compr_stream *stream)
{
int retval;
if (stream->runtime->state != SNDRV_PCM_STATE_PREPARED)
switch (stream->runtime->state) {
case SNDRV_PCM_STATE_SETUP:
if (stream->direction != SND_COMPRESS_CAPTURE)
return -EPERM;
break;
case SNDRV_PCM_STATE_PREPARED:
break;
default:
return -EPERM;
}
retval = stream->ops->trigger(stream, SNDRV_PCM_TRIGGER_START);
if (!retval)
stream->runtime->state = SNDRV_PCM_STATE_RUNNING;
......
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