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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>
This commit is contained in:
Peter Ujfalusi 2016-05-09 13:39:14 +03:00 committed by Mark Brown
parent 5f9a50c3e5
commit 1935736663
1 changed files with 6 additions and 2 deletions
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8
sound/soc/davinci/davinci-mcasp.c
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@ -1230,11 +1230,15 @@ 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;