ASoC: dmaengine: Add config parameter NULL check.
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.Xiubo@freescale.com> Acked-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Mark Brown <broonie@linaro.org>
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@ -299,7 +299,7 @@ static int dmaengine_pcm_request_chan_of(struct dmaengine_pcm *pcm,
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!dev->of_node)
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return 0;
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if (config->dma_dev) {
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if (config && config->dma_dev) {
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/*
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* If this warning is seen, it probably means that your Linux
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* device structure does not match your HW device structure.
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@ -317,7 +317,7 @@ static int dmaengine_pcm_request_chan_of(struct dmaengine_pcm *pcm,
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name = "rx-tx";
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else
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name = dmaengine_pcm_dma_channel_names[i];
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if (config->chan_names[i])
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if (config && config->chan_names[i])
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name = config->chan_names[i];
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chan = dma_request_slave_channel_reason(dev, name);
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if (IS_ERR(chan)) {
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