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Date: Mon, 18 Feb 2019 14:43:31 +0100 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Charles Keepax <ckeepax@...nsource.cirrus.com>, Takashi Iwai <tiwai@...e.de> Subject: [PATCH 4.4 083/143] ALSA: compress: Fix stop handling on compressed capture streams 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Charles Keepax <ckeepax@...nsource.cirrus.com> commit 4f2ab5e1d13d6aa77c55f4914659784efd776eb4 upstream. It is normal user behaviour to start, stop, then start a stream again without closing it. Currently this works for compressed playback streams but not capture ones. The states on a compressed capture stream go directly from OPEN to PREPARED, unlike a playback stream which moves to SETUP and waits for a write of data before moving to PREPARED. Currently however, when a stop is sent the state is set to SETUP for both types of streams. This leaves a capture stream in the situation where a new start can't be sent as that requires the state to be PREPARED and a new set_params can't be sent as that requires the state to be OPEN. The only option being to close the stream, and then reopen. Correct this issues by allowing snd_compr_drain_notify to set the state depending on the stream direction, as we already do in set_params. Fixes: 49bb6402f1aa ("ALSA: compress_core: Add support for capture streams") Signed-off-by: Charles Keepax <ckeepax@...nsource.cirrus.com> Cc: <stable@...r.kernel.org> Signed-off-by: Takashi Iwai <tiwai@...e.de> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- include/sound/compress_driver.h | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) --- a/include/sound/compress_driver.h +++ b/include/sound/compress_driver.h @@ -178,7 +178,11 @@ static inline void snd_compr_drain_notif if (snd_BUG_ON(!stream)) return; - stream->runtime->state = SNDRV_PCM_STATE_SETUP; + if (stream->direction == SND_COMPRESS_PLAYBACK) + stream->runtime->state = SNDRV_PCM_STATE_SETUP; + else + stream->runtime->state = SNDRV_PCM_STATE_PREPARED; + wake_up(&stream->runtime->sleep); }
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