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authorJoachim Eastwood <joachim.eastwood@jotron.com>2012-01-01 01:58:44 +0100
committerMark Brown <broonie@opensource.wolfsonmicro.com>2012-01-07 11:18:05 -0800
commit25e9e7565f9aa9e4b976387a3fab60bfaa4efac8 (patch)
tree4a937cd72ecbd52980d09799aab0092a0f1bb4b8 /sound/soc/atmel
parent739be96ab83755e10fd0c2b6a34c8a73254527f7 (diff)
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/atmel')
-rw-r--r--sound/soc/atmel/atmel-pcm.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/sound/soc/atmel/atmel-pcm.c b/sound/soc/atmel/atmel-pcm.c
index 60de05525c06..a21ff459e5d3 100644
--- a/sound/soc/atmel/atmel-pcm.c
+++ b/sound/soc/atmel/atmel-pcm.c
@@ -367,7 +367,6 @@ static u64 atmel_pcm_dmamask = 0xffffffff;
static int atmel_pcm_new(struct snd_soc_pcm_runtime *rtd)
{
struct snd_card *card = rtd->card->snd_card;
- struct snd_soc_dai *dai = rtd->cpu_dai;
struct snd_pcm *pcm = rtd->pcm;
int ret = 0;
@@ -376,14 +375,14 @@ static int atmel_pcm_new(struct snd_soc_pcm_runtime *rtd)
if (!card->dev->coherent_dma_mask)
card->dev->coherent_dma_mask = 0xffffffff;
- if (dai->driver->playback.channels_min) {
+ if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
ret = atmel_pcm_preallocate_dma_buffer(pcm,
SNDRV_PCM_STREAM_PLAYBACK);
if (ret)
goto out;
}
- if (dai->driver->capture.channels_min) {
+ if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
pr_debug("atmel-pcm:"
"Allocating PCM capture DMA buffer\n");
ret = atmel_pcm_preallocate_dma_buffer(pcm,