[xburst] sound jz4740_pcm: Set dma channel to NULL after it has been freed,

because hw_free can be called multiple times aswell.

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@20373 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/target/linux/xburst/files-2.6.32/sound/soc/jz4740/jz4740-pcm.c b/target/linux/xburst/files-2.6.32/sound/soc/jz4740/jz4740-pcm.c
index 4a4de19..3ccc652 100644 (file)
--- a/target/linux/xburst/files-2.6.32/sound/soc/jz4740/jz4740-pcm.c
+++ b/target/linux/xburst/files-2.6.32/sound/soc/jz4740/jz4740-pcm.c
@@ -136,8 +136,10 @@ static int jz4740_pcm_hw_free(struct snd_pcm_substream *substream)
        struct jz4740_runtime_data *prtd = substream->runtime->private_data;
 
        snd_pcm_set_runtime_buffer(substream, NULL);
        struct jz4740_runtime_data *prtd = substream->runtime->private_data;
 
        snd_pcm_set_runtime_buffer(substream, NULL);

-       if (prtd->dma)
+       if (prtd->dma) {

                jz4740_dma_free(prtd->dma);
                jz4740_dma_free(prtd->dma);

+               prtd->dma = NULL;
+       }

 
        return 0;
 }
 
        return 0;
 }