ASoC: imx-pcm-dma: check kzalloc return value in function snd_imx_open
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>
diff --git a/sound/soc/fsl/imx-pcm-dma.c b/sound/soc/fsl/imx-pcm-dma.c
index 48f9d88..a23505a 100644
--- a/sound/soc/fsl/imx-pcm-dma.c
+++ b/sound/soc/fsl/imx-pcm-dma.c
@@ -109,6 +109,9 @@
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;