ASoC: Lock the CODEC in PXA external jack controls

When doing anything with the system, especially DAPM, we need to hold the
CODEC mutex.

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

1 files changed, 4 insertions, 0 deletions

diff --git a/sound/soc/pxa/magician.c b/sound/soc/pxa/magician.c
index b8207ced4072..5ef0526924b9 100644
--- a/sound/soc/pxa/magician.c
+++ b/sound/soc/pxa/magician.c
@@ -72,9 +72,13 @@ static int magician_startup(struct snd_pcm_substream *substream)
         struct snd_soc_pcm_runtime *rtd = substream->private_data;
         struct snd_soc_codec *codec = rtd->codec;
 
+        mutex_lock(&codec->mutex);
+
         /* check the jack status at stream startup */
         magician_ext_control(codec);
 
+        mutex_unlock(&codec->mutex);
+
         return 0;
 }