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ASoC: dpcm: skip missing substream while applying symmetry 

If for any reason, the backend does not have the requested substream
(like capture on a playback only backend), the BE will be skipped in
dpcm_be_dai_startup().

However, dpcm_apply_symmetry() does not skip those BE and will
dereference the be_substream (NULL) pointer anyway.

Like in dpcm_be_dai_startup(), just skip those BE.

Fixes: 906c7d690c ("ASoC: dpcm: Apply symmetry for DPCM")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Jerome Brunet 2019-04-01 15:03:54 +02:00 committed by Mark Brown
parent c63adb28f6
commit 6246f283d5
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 6 additions and 1 deletions
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7
sound/soc/soc-pcm.c
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@ -1911,10 +1911,15 @@ static int dpcm_apply_symmetry(struct snd_pcm_substream *fe_substream,
struct snd_soc_pcm_runtime *be = dpcm->be;
struct snd_pcm_substream *be_substream =
snd_soc_dpcm_get_substream(be, stream);
struct snd_soc_pcm_runtime *rtd = be_substream->private_data;
struct snd_soc_pcm_runtime *rtd;
struct snd_soc_dai *codec_dai;
int i;
/* A backend may not have the requested substream */
if (!be_substream)
continue;
rtd = be_substream->private_data;
if (rtd->dai_link->be_hw_params_fixup)
continue;