Since the soc generic dmaengine pcm driver allows using the defualt settings,
so the pcm->config maybe NULL.
Signed-off-by: Xiubo Li <li.xi...@freescale.com>
---
sound/soc/soc-generic-dmaengine-pcm.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/sound/soc/soc-generic-dmaengine-pcm.c
b/sound/soc/soc-generic-dmaengine-pcm.c
index 560a778..5bace12 100644
--- a/sound/soc/soc-generic-dmaengine-pcm.c
+++ b/sound/soc/soc-generic-dmaengine-pcm.c
@@ -176,17 +176,20 @@ static struct dma_chan
*dmaengine_pcm_compat_request_channel(
{
struct dmaengine_pcm *pcm = soc_platform_to_pcm(rtd->platform);
struct snd_dmaengine_dai_dma_data *dma_data;
+ dma_filter_fn fn = NULL;
dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
if ((pcm->flags & SND_DMAENGINE_PCM_FLAG_HALF_DUPLEX) && pcm->chan[0])
return pcm->chan[0];
- if (pcm->config->compat_request_channel)
+ if (pcm->config && pcm->config->compat_request_channel)
return pcm->config->compat_request_channel(rtd, substream);
- return snd_dmaengine_pcm_request_channel(pcm->config->compat_filter_fn,
- dma_data->filter_data);
+ if (pcm->config)
+ fn = pcm->config->compat_filter_fn;
+
+ return snd_dmaengine_pcm_request_channel(fn, dma_data->filter_data);
}
static bool dmaengine_pcm_can_report_residue(struct dma_chan *chan)
--
1.8.4
--
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