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ASoC: imx-pcm-dma: check kzalloc return value in function snd_imx_open

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It fixed smatch warning:
sound/soc/fsl/imx-pcm-dma.c:112 snd_imx_open() error: potential null dereference 'dma_data'.  (kzalloc returns null)

Signed-off-by: Richard Zhao <richard.zhao@freescale.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Richard Zhao 2012-09-18 17:20:05 +08:00 committed by Mark Brown
parent 86767b7d5b
commit d37777a13b
1 changed files with 3 additions and 0 deletions
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sound/soc/fsl/imx-pcm-dma.c
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@ -109,6 +109,9 @@ static int snd_imx_open(struct snd_pcm_substream *substream)
dma_params = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
dma_data = kzalloc(sizeof(*dma_data), GFP_KERNEL);
if (!dma_data)
return -ENOMEM;
dma_data->peripheral_type = dma_params->shared_peripheral ?
IMX_DMATYPE_SSI_SP : IMX_DMATYPE_SSI;
dma_data->priority = DMA_PRIO_HIGH;