ASoC: wm8731: Move the deemph lock to the driver level

The wm8731 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>

1 files changed, 7 insertions, 2 deletions

diff --git a/sound/soc/codecs/wm8731.c b/sound/soc/codecs/wm8731.c
index eebb3280bfad..5dae9a6f8076 100644
--- a/sound/soc/codecs/wm8731.c
+++ b/sound/soc/codecs/wm8731.c
@@ -24,6 +24,7 @@
 #include <linux/regulator/consumer.h>
 #include <linux/spi/spi.h>
 #include <linux/of_device.h>
+#include <linux/mutex.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/pcm_params.h>
@@ -50,6 +51,8 @@ struct wm8731_priv {
         int sysclk_type;
         int playback_fs;
         bool deemph;
+
+        struct mutex lock;
 };
 
 
@@ -138,7 +141,7 @@ static int wm8731_put_deemph(struct snd_kcontrol *kcontrol,
         if (deemph > 1)
                 return -EINVAL;
 
-        mutex_lock(&codec->mutex);
+        mutex_lock(&wm8731->lock);
         if (wm8731->deemph != deemph) {
                 wm8731->deemph = deemph;
 
@@ -146,7 +149,7 @@ static int wm8731_put_deemph(struct snd_kcontrol *kcontrol,
 
                 ret = 1;
         }
-        mutex_unlock(&codec->mutex);
+        mutex_unlock(&wm8731->lock);
 
         return ret;
 }
@@ -685,6 +688,8 @@ static int wm8731_spi_probe(struct spi_device *spi)
         if (wm8731 == NULL)
                 return -ENOMEM;
 
+        mutex_init(&wm8731->lock);
+
         wm8731->regmap = devm_regmap_init_spi(spi, &wm8731_regmap);
         if (IS_ERR(wm8731->regmap)) {
                 ret = PTR_ERR(wm8731->regmap);