@@ -1252,11 +1252,15 @@ static int davinci_mcasp_startup(struct snd_pcm_substream *substream,
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;
Make sure that the user can not start multiple streams with the same direction. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com> --- sound/soc/davinci/davinci-mcasp.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)