ASoC: wm8903: Move the deemph lock to the driver level

The wm8903 uses the snd_soc_codec mutex to protect its deemph settings from
concurrent access. This patch moves this lock to the driver level. This will
allow us to eventually remove the snd_soc_codec mutex.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/codecs/wm8903.c b/sound/soc/codecs/wm8903.c
index c038b3e..ffbe6df 100644 (file)
--- a/sound/soc/codecs/wm8903.c
+++ b/sound/soc/codecs/wm8903.c
@@ -26,6 +26,7 @@
 #include <linux/regmap.h>
 #include <linux/slab.h>
 #include <linux/irq.h>
+#include <linux/mutex.h>
 #include <sound/core.h>
 #include <sound/jack.h>
 #include <sound/pcm.h>
@@ -123,6 +124,7 @@ struct wm8903_priv {
        int sysclk;
        int irq;
 
+       struct mutex lock;
        int fs;
        int deemph;
 
@@ -457,7 +459,7 @@ static int wm8903_put_deemph(struct snd_kcontrol *kcontrol,
        if (deemph > 1)
                return -EINVAL;
 
-       mutex_lock(&codec->mutex);
+       mutex_lock(&wm8903->lock);
        if (wm8903->deemph != deemph) {
                wm8903->deemph = deemph;
 
@@ -465,7 +467,7 @@ static int wm8903_put_deemph(struct snd_kcontrol *kcontrol,
 
                ret = 1;
        }
-       mutex_unlock(&codec->mutex);
+       mutex_unlock(&wm8903->lock);
 
        return ret;
 }
@@ -2023,6 +2025,8 @@ static int wm8903_i2c_probe(struct i2c_client *i2c,
                              GFP_KERNEL);
        if (wm8903 == NULL)
                return -ENOMEM;
+
+       mutex_init(&wm8903->lock);
        wm8903->dev = &i2c->dev;
 
        wm8903->regmap = devm_regmap_init_i2c(i2c, &wm8903_regmap);