From 97c96c076b8ef86533f2427ea145a9cd0ec5564f Mon Sep 17 00:00:00 2001 From: Vasily Khoruzhick Date: Sat, 2 Apr 2011 10:54:47 +0300 Subject: ASoC: PXA: Fix oops in __pxa2xx_pcm_prepare pxa2xx_pcm_hw_free frees dma channel and sets prtd->dma_ch to -1, but does not set prtd->params to NULL, so if pxa2xx_pcm_hw_params will be called immediately, it leaves prtd->dma_ch initialized with -1, and it results in oops in __pxa2xx_pcm_prepare. This bug is triggered via SDL. This patch adds check for prtd->dma_ch to __pxa2xx_pcm_prepare and cleans prtd->params, so now it works properly. Signed-off-by: Vasily Khoruzhick Signed-off-by: Mark Brown --- sound/arm/pxa2xx-pcm-lib.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'sound/arm') diff --git a/sound/arm/pxa2xx-pcm-lib.c b/sound/arm/pxa2xx-pcm-lib.c index 8808b82311b..76e0d569507 100644 --- 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; -- cgit v1.2.3-70-g09d2