[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 4a4de195a879e7bb3d592ea8066a074b530ca60e..3ccc652a0b8ed5a54a9ad9b33c6a86b1d7a55dee 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);
-       if (prtd->dma)
+       if (prtd->dma) {
                jz4740_dma_free(prtd->dma);
+               prtd->dma = NULL;
+       }
 
        return 0;
 }