From: Mark Brown <broonie@linaro.org>
Date: Mon, 19 Aug 2013 19:33:20 +0000 (+0100)
Subject: ASoC: samsung: Check to see if we managed to allocate a channel
X-Git-Tag: next-20130822~64^2~23^2~1
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=37e6071787908fa9009cbd002c86402720becc5f;p=karo-tx-linux.git

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 21b79262010e..50c1eb669e90 100644
--- 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);
 	}