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 108b643..6205f37 100644 (file)
--- 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;
 
 {
        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);
                *rtd->params->drcmr = 0;
 
        snd_pcm_set_runtime_buffer(substream, NULL);