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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>
hifive-unleashed-5.1
Jean-Francois Moine 2015-07-21 18:32:58 +02:00 committed by Mark Brown
parent bc0195aad0
commit c4a42915d8
1 changed files with 4 additions and 0 deletions
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4
sound/soc/kirkwood/kirkwood-dma.c
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@ -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);