From: Daniel Mack <daniel@caiaq.de>
Date: Wed, 8 Jul 2009 17:24:26 +0000 (+0200)
Subject: ASoC: Fix NULL pointer dereference in __pxa2xx_pcm_hw_free
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=b7d4de7ff03085fda8310b2983b907166dd40f43;p=linux-beck.git

ASoC: Fix NULL pointer dereference in __pxa2xx_pcm_hw_free

Check for rtd->params->drcmr != NULL before accessing it.

Signed-off-by: Daniel Mack <daniel@caiaq.de>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
---

diff --git a/sound/arm/pxa2xx-pcm-lib.c b/sound/arm/pxa2xx-pcm-lib.c
index 108b643229ba..6205f37d547c 100644
--- a/sound/arm/pxa2xx-pcm-lib.c
+++ b/sound/arm/pxa2xx-pcm-lib.c
@@ -75,7 +75,7 @@ int __pxa2xx_pcm_hw_free(struct snd_pcm_substream *substream)
 {
 	struct pxa2xx_runtime_data *rtd = substream->runtime->private_data;
 
-	if (rtd && rtd->params)
+	if (rtd && rtd->params && rtd->params->drcmr)
 		*rtd->params->drcmr = 0;
 
 	snd_pcm_set_runtime_buffer(substream, NULL);