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authorBo Shen <voice.shen@atmel.com>2013-07-03 16:37:56 +0800
committerMark Brown <broonie@linaro.org>2013-07-15 11:07:55 +0100
commit01f00d55a7f21b966417fece78214154f01590ed (patch)
tree279da23c190e2224d342ec16cd73dff879cc69ea /sound/soc/atmel
parentad81f0545ef01ea651886dddac4bef6cec930092 (diff)
downloadlinux-01f00d55a7f21b966417fece78214154f01590ed.tar.bz2
ASoC: atmel_ssc_dai: move set dma data to startup callback
move set dma data to startup callback function, if the set dma data exist in hw_params callback, so the dma data only usable when call hw_params, if want use it before hw_params callback, it will cause NULL pointer access oops Signed-off-by: Bo Shen <voice.shen@atmel.com> Reviewed-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'sound/soc/atmel')
-rw-r--r--sound/soc/atmel/atmel_ssc_dai.c33
1 files changed, 16 insertions, 17 deletions
diff --git a/sound/soc/atmel/atmel_ssc_dai.c b/sound/soc/atmel/atmel_ssc_dai.c
index f3fdfa07fcb9..6cf9cf1238cc 100644
--- a/sound/soc/atmel/atmel_ssc_dai.c
+++ b/sound/soc/atmel/atmel_ssc_dai.c
@@ -196,15 +196,27 @@ static int atmel_ssc_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct atmel_ssc_info *ssc_p = &ssc_info[dai->id];
- int dir_mask;
+ struct atmel_pcm_dma_params *dma_params;
+ int dir, dir_mask;
pr_debug("atmel_ssc_startup: SSC_SR=0x%u\n",
ssc_readl(ssc_p->ssc->regs, SR));
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ dir = 0;
dir_mask = SSC_DIR_MASK_PLAYBACK;
- else
+ } else {
+ dir = 1;
dir_mask = SSC_DIR_MASK_CAPTURE;
+ }
+
+ dma_params = &ssc_dma_params[dai->id][dir];
+ dma_params->ssc = ssc_p->ssc;
+ dma_params->substream = substream;
+
+ ssc_p->dma_params[dir] = dma_params;
+
+ snd_soc_dai_set_dma_data(dai, substream, dma_params);
spin_lock_irq(&ssc_p->lock);
if (ssc_p->dir_mask & dir_mask) {
@@ -325,7 +337,6 @@ static int atmel_ssc_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
- struct snd_soc_pcm_runtime *rtd = snd_pcm_substream_chip(substream);
int id = dai->id;
struct atmel_ssc_info *ssc_p = &ssc_info[id];
struct atmel_pcm_dma_params *dma_params;
@@ -344,19 +355,7 @@ static int atmel_ssc_hw_params(struct snd_pcm_substream *substream,
else
dir = 1;
- dma_params = &ssc_dma_params[id][dir];
- dma_params->ssc = ssc_p->ssc;
- dma_params->substream = substream;
-
- ssc_p->dma_params[dir] = dma_params;
-
- /*
- * The snd_soc_pcm_stream->dma_data field is only used to communicate
- * the appropriate DMA parameters to the pcm driver hw_params()
- * function. It should not be used for other purposes
- * as it is common to all substreams.
- */
- snd_soc_dai_set_dma_data(rtd->cpu_dai, substream, dma_params);
+ dma_params = ssc_p->dma_params[dir];
channels = params_channels(params);