ASoC: samsung: Check to see if we managed to allocate a channel

Signed-off-by: Mark Brown <broonie@linaro.org>
Acked-by: Sangbeom Kim <sbkim73@samsung.com>

diff --git a/sound/soc/samsung/dma.c b/sound/soc/samsung/dma.c
index 21b7926..50c1eb6 100644 (file)
--- a/sound/soc/samsung/dma.c
+++ b/sound/soc/samsung/dma.c
@@ -176,6 +176,10 @@ static int dma_hw_params(struct snd_pcm_substream *substream,
                prtd->params->ch = prtd->params->ops->request(
                                prtd->params->channel, &req, rtd->cpu_dai->dev,
                                prtd->params->ch_name);
+               if (!prtd->params->ch) {
+                       pr_err("Failed to allocate DMA channel\n");
+                       return -ENXIO;
+               }
                prtd->params->ops->config(prtd->params->ch, &config);
        }