ASoC: wm8731: init mutex in i2c init path

The I2C init path forgot to init the mutex, leading to an oops when
controls are accessed.

Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org

diff --git a/sound/soc/codecs/wm8731.c b/sound/soc/codecs/wm8731.c
index b9211b42f6e919f0603eabda95ca332eea71dfb6..b115ed815db97329bb9d6a4c6d7b50faf42f5f40 100644 (file)
--- a/sound/soc/codecs/wm8731.c
+++ b/sound/soc/codecs/wm8731.c
@@ -717,6 +717,8 @@ static int wm8731_i2c_probe(struct i2c_client *i2c,
        if (wm8731 == NULL)
                return -ENOMEM;
 
+       mutex_init(&wm8731->lock);
+
        wm8731->regmap = devm_regmap_init_i2c(i2c, &wm8731_regmap);
        if (IS_ERR(wm8731->regmap)) {
                ret = PTR_ERR(wm8731->regmap);