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ASoC: PXA: Fix oops in __pxa2xx_pcm_prepare
[pandora-kernel.git]
/
sound
/
arm
/
pxa2xx-pcm-lib.c
diff --git
a/sound/arm/pxa2xx-pcm-lib.c
b/sound/arm/pxa2xx-pcm-lib.c
index
8808b82
..
76e0d56
100644
(file)
--- a/
sound/arm/pxa2xx-pcm-lib.c
+++ b/
sound/arm/pxa2xx-pcm-lib.c
@@
-140,6
+140,9
@@
int __pxa2xx_pcm_prepare(struct snd_pcm_substream *substream)
if (!prtd || !prtd->params)
return 0;
+ if (prtd->dma_ch == -1)
+ return -EINVAL;
+
DCSR(prtd->dma_ch) &= ~DCSR_RUN;
DCSR(prtd->dma_ch) = 0;
DCMD(prtd->dma_ch) = 0;