From cbc76c3b9d42ce1720e57cdb8026e2e218fb2eea Mon Sep 17 00:00:00 2001 From: Charles Keepax Date: Mon, 22 Jul 2019 10:24:35 +0100 Subject: [PATCH] ALSA: compress: Don't allow paritial drain operations on capture streams [ Upstream commit a70ab8a8645083f3700814e757f2940a88b7ef88 ] Partial drain and next track are intended for gapless playback and don't really have an obvious interpretation for a capture stream, so makes sense to not allow those operations on capture streams. Signed-off-by: Charles Keepax Acked-by: Vinod Koul Signed-off-by: Takashi Iwai Signed-off-by: Sasha Levin --- sound/core/compress_offload.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/sound/core/compress_offload.c b/sound/core/compress_offload.c index 1538fbc7562b..b4f1536b17cb 100644 --- a/sound/core/compress_offload.c +++ b/sound/core/compress_offload.c @@ -835,6 +835,10 @@ static int snd_compr_next_track(struct snd_compr_stream *stream) if (stream->runtime->state != SNDRV_PCM_STATE_RUNNING) return -EPERM; + /* next track doesn't have any meaning for capture streams */ + if (stream->direction == SND_COMPRESS_CAPTURE) + return -EPERM; + /* you can signal next track if this is intended to be a gapless stream * and current track metadata is set */ @@ -862,6 +866,10 @@ static int snd_compr_partial_drain(struct snd_compr_stream *stream) break; } + /* partial drain doesn't have any meaning for capture streams */ + if (stream->direction == SND_COMPRESS_CAPTURE) + return -EPERM; + /* stream can be drained only when next track has been signalled */ if (stream->next_track == false) return -EPERM; -- 2.20.1