From: Stephen Ware <stephen.ware@eqware.net>
Date: Wed, 31 Dec 2008 22:39:23 +0000 (-0800)
Subject: ASoC: Fix pxa2xx-pcm checks for invalid DMA channels
X-Git-Tag: v2.6.29-rc1~503^2~4^2~1
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=9bef6489d72abd8f598aede92be3854a69324c50;p=linux-2.6-omap-h63xx.git

ASoC: Fix pxa2xx-pcm checks for invalid DMA channels

Set the invalid dma channel to -1 (and check properly for it) in
pxa2xx_pcm_hw_free().  Was assuming 0 is an invalid channel number but 0
is a valid pxa dma channel num.

Signed-off-by: stephen <stephen.ware@eqware.net>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
---

diff --git a/sound/soc/pxa/pxa2xx-pcm.c b/sound/soc/pxa/pxa2xx-pcm.c
index c670d08e7c9..53b9fb127a6 100644
--- a/sound/soc/pxa/pxa2xx-pcm.c
+++ b/sound/soc/pxa/pxa2xx-pcm.c
@@ -61,9 +61,9 @@ static int pxa2xx_pcm_hw_free(struct snd_pcm_substream *substream)
 
 	__pxa2xx_pcm_hw_free(substream);
 
-	if (prtd->dma_ch) {
+	if (prtd->dma_ch >= 0) {
 		pxa_free_dma(prtd->dma_ch);
-		prtd->dma_ch = 0;
+		prtd->dma_ch = -1;
 	}
 
 	return 0;