diff --git a/sound/arm/pxa2xx-pcm-lib.c b/sound/arm/pxa2xx-pcm-lib.c
index 743ac6a2906598fdbd70a04f6a3c6910fd86fdfe..fd51fa8b06a12cea27815c2ec9b121841cbc3076 100644
--- a/sound/arm/pxa2xx-pcm-lib.c
+++ b/sound/arm/pxa2xx-pcm-lib.c
@@ -205,6 +205,7 @@ int __pxa2xx_pcm_open(struct snd_pcm_substream *substream)
 	if (!rtd->dma_desc_array)
 		goto err1;
 
+	rtd->dma_ch = -1;
 	runtime->private_data = rtd;
 	return 0;