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| author |   Joachim Eastwood <joachim.eastwood@jotron.com> | 2012-01-01 01:58:44 +0100 |
|---|---|---|
| committer |   Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-01-07 11:18:05 -0800 |
| commit | 25e9e7565f9aa9e4b976387a3fab60bfaa4efac8 (patch) | |
| tree | 4a937cd72ecbd52980d09799aab0092a0f1bb4b8 /sound/soc/mid-x86/sst_platform.c | |
| parent | ASoC: Fix build dependency for SND_ATMEL_SOC_SSC (diff) | |
| download | linux-dev-25e9e7565f9aa9e4b976387a3fab60bfaa4efac8.tar.xz linux-dev-25e9e7565f9aa9e4b976387a3fab60bfaa4efac8.zip | |
ASoC: check for substream not channels_min in pcm engines
This is a follow up on 53dea36c70c1857 which fixes the other affected
pcm engines.
Description from 53dea36c70c1857:
Don't rely on the codec's channels_min information to decide wheter or
not allocate a substream's DMA buffer. Rather check if the substream
itself was allocated previously.
Without this patch I was seeing null-pointer dereferenc in atmel-pcm.
Signed-off-by: Joachim Eastwood <joachim.eastwood@jotron.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound/soc/mid-x86/sst_platform.c')
| -rw-r--r-- | sound/soc/mid-x86/sst_platform.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/sound/soc/mid-x86/sst_platform.c b/sound/soc/mid-x86/sst_platform.c index c2bf172a196e..d34563b12c3b 100644 --- a/sound/soc/mid-x86/sst_platform.c +++ b/sound/soc/mid-x86/sst_platform.c @@ -446,13 +446,12 @@ static void sst_pcm_free(struct snd_pcm *pcm) static int sst_pcm_new(struct snd_soc_pcm_runtime *rtd) { - struct snd_soc_dai *dai = rtd->cpu_dai; struct snd_pcm *pcm = rtd->pcm; int retval = 0; pr_debug("sst_pcm_new called\n"); - if (dai->driver->playback.channels_min || - dai->driver->capture.channels_min) { + if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream || + pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) { retval = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS, snd_dma_continuous_data(GFP_KERNEL), |