ASoC: davinci-mcasp: Do not allow multiple streams in one direction
Make sure that the user can not start multiple streams with the same
direction.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/sound/soc/davinci/davinci-mcasp.c b/sound/soc/davinci/davinci-mcasp.c
index e132498..020d866 100644
--- a/sound/soc/davinci/davinci-mcasp.c
+++ b/sound/soc/davinci/davinci-mcasp.c
@@ -1230,11 +1230,15 @@
int i, dir;
int tdm_slots = mcasp->tdm_slots;
- if (mcasp->tdm_mask[substream->stream])
- tdm_slots = hweight32(mcasp->tdm_mask[substream->stream]);
+ /* Do not allow more then one stream per direction */
+ if (mcasp->substreams[substream->stream])
+ return -EBUSY;
mcasp->substreams[substream->stream] = substream;
+ if (mcasp->tdm_mask[substream->stream])
+ tdm_slots = hweight32(mcasp->tdm_mask[substream->stream]);
+
if (mcasp->op_mode == DAVINCI_MCASP_DIT_MODE)
return 0;