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authorVasily Khoruzhick <anarsoul@gmail.com>2011-04-02 10:54:47 +0300
committerMark Brown <broonie@opensource.wolfsonmicro.com>2011-04-03 18:48:56 +0900
commit97c96c076b8ef86533f2427ea145a9cd0ec5564f (patch)
tree3bcedb97c64864b3811699cb1ea865ef95e76c3e /sound/soc/pxa
parentefd6947945fe5ebcf759e762f51c4e1d867edc49 (diff)
downloadblackbird-op-linux-97c96c076b8ef86533f2427ea145a9cd0ec5564f.tar.gz
blackbird-op-linux-97c96c076b8ef86533f2427ea145a9cd0ec5564f.zip
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 <anarsoul@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'sound/soc/pxa')
-rw-r--r--sound/soc/pxa/pxa2xx-pcm.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/sound/soc/pxa/pxa2xx-pcm.c b/sound/soc/pxa/pxa2xx-pcm.c
index 02fb66416ddc..2ce0b2d891d5 100644
--- a/sound/soc/pxa/pxa2xx-pcm.c
+++ b/sound/soc/pxa/pxa2xx-pcm.c
@@ -65,6 +65,7 @@ static int pxa2xx_pcm_hw_free(struct snd_pcm_substream *substream)
if (prtd->dma_ch >= 0) {
pxa_free_dma(prtd->dma_ch);
prtd->dma_ch = -1;
+ prtd->params = NULL;
}
return 0;
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