Because the "ASoC: dmaengine-pcm: Provide default config" has provided
us one defualt config of DMA. When using this, the config parameter of
devm_snd_dmaengine_pcm_register() will be NULL, so here we need to have
a check before using it.
Signed-off-by: Xiubo Li <li.xi...@freescale.com>
---
sound/soc/soc-generic-dmaengine-pcm.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/sound/soc/soc-generic-dmaengine-pcm.c
b/sound/soc/soc-generic-dmaengine-pcm.c
index 7483922..2a6c569 100644
--- a/sound/soc/soc-generic-dmaengine-pcm.c
+++ b/sound/soc/soc-generic-dmaengine-pcm.c
@@ -299,7 +299,7 @@ static int dmaengine_pcm_request_chan_of(struct
dmaengine_pcm *pcm,
!dev->of_node)
return 0;
- if (config->dma_dev) {
+ if (config && config->dma_dev) {
/*
* If this warning is seen, it probably means that your Linux
* device structure does not match your HW device structure.
@@ -317,7 +317,7 @@ static int dmaengine_pcm_request_chan_of(struct
dmaengine_pcm *pcm,
name = "rx-tx";
else
name = dmaengine_pcm_dma_channel_names[i];
- if (config->chan_names[i])
+ if (config && config->chan_names[i])
name = config->chan_names[i];
chan = dma_request_slave_channel_reason(dev, name);
if (IS_ERR(chan)) {
--
1.8.4
--
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