ASoC: pxa-pcm-lib: initialize DMA channel to -1

This fixes a warning ("pxa_free_dma: trying to free channel 0 which is
already freed") when a device was opened but the hw_params() call
failed.

Signed-off-by: Daniel Mack <daniel@caiaq.de>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/sound/arm/pxa2xx-pcm-lib.c b/sound/arm/pxa2xx-pcm-lib.c
index 743ac6a29065..fd51fa8b06a1 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;