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| author |   Jean-Francois Moine <moinejf@free.fr> | 2015-07-21 18:32:58 +0200 |
|---|---|---|
| committer |   Mark Brown <broonie@kernel.org> | 2015-07-21 18:07:01 +0100 |
| commit | c4a42915d84ad4b5b5e13aeed5da67f458e22399 (patch) | |
| tree | e4fa270b3ca573f4d056c5edb228c94b618fdd96 /sound/soc/kirkwood | |
| parent | Linux 4.2-rc2 (diff) | |
| download | linux-dev-c4a42915d84ad4b5b5e13aeed5da67f458e22399.tar.xz linux-dev-c4a42915d84ad4b5b5e13aeed5da67f458e22399.zip | |
ASoC: kirkwood: prevent double streaming
The kirkwood audio subsystem presents 2 PCM's for one source.
Streaming on a second PCM while the first one is active
cuts this last one.
Then, ending the last stream gives a kernel trap in free_irq().
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/kirkwood')
| -rw-r--r-- | sound/soc/kirkwood/kirkwood-dma.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/sound/soc/kirkwood/kirkwood-dma.c b/sound/soc/kirkwood/kirkwood-dma.c index 4cf2245950d7..dbfdfe99c69d 100644 --- a/sound/soc/kirkwood/kirkwood-dma.c +++ b/sound/soc/kirkwood/kirkwood-dma.c @@ -148,10 +148,14 @@ static int kirkwood_dma_open(struct snd_pcm_substream *substream) dram = mv_mbus_dram_info(); addr = substream->dma_buffer.addr; if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + if (priv->substream_play) + return -EBUSY; priv->substream_play = substream; kirkwood_dma_conf_mbus_windows(priv->io, KIRKWOOD_PLAYBACK_WIN, addr, dram); } else { + if (priv->substream_rec) + return -EBUSY; priv->substream_rec = substream; kirkwood_dma_conf_mbus_windows(priv->io, KIRKWOOD_RECORD_WIN, addr, dram); |