[alsa-devel] [PATCH] ASoC: samsung: Check to see if we managed to allocate a channel

From: Mark Brown broonie@linaro.org

Signed-off-by: Mark Brown broonie@linaro.org --- sound/soc/samsung/dma.c | 4 ++++ 1 file changed, 4 insertions(+)

diff --git a/sound/soc/samsung/dma.c b/sound/soc/samsung/dma.c index 6e2b2b4..d54df85 100644 --- a/sound/soc/samsung/dma.c +++ b/sound/soc/samsung/dma.c @@ -183,6 +183,10 @@ 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); }