diff options
Diffstat (limited to 'kernel/sound/soc/kirkwood/kirkwood-dma.c')
| -rw-r--r-- | kernel/sound/soc/kirkwood/kirkwood-dma.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/sound/soc/kirkwood/kirkwood-dma.c b/kernel/sound/soc/kirkwood/kirkwood-dma.c index 4cf224595..dbfdfe99c 100644 --- a/kernel/sound/soc/kirkwood/kirkwood-dma.c +++ b/kernel/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); |