[PATCH] ASoC: wm8731: init mutex in i2c init path

[PATCH] ASoC: wm8731: init mutex in i2c init path

[Manuel Lauss]

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>
---
Fixes an oops on bootup when alsactl tries to restore codec parameters
on my MIPS DB1300 board.

 sound/soc/codecs/wm8731.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sound/soc/codecs/wm8731.c b/sound/soc/codecs/wm8731.c
index b9211b4..b115ed8 100644
--- 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);
-- 
2.2.1

Re: [PATCH] ASoC: wm8731: init mutex in i2c init path

[Mark Brown]

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On Mon, Jan 19, 2015 at 08:23:43AM +0100, Manuel Lauss wrote:
> The I2C init path forgot to init the mutex, leading to an oops when
> controls are accessed.

Applied, thanks.  Please remember to CC maintainers on patches,
including driver maintainers as well as subsystem maintainers.

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