[PATCH] extcon: arizona: Use DAPM mutex helper functions

[Charles Keepax <ckeepax@opensource.wolfsonmicro.com>]

We should be using the helper functions to lock the DAPM mutex not
accessing it directly. There are no ill effects of this as the moment
but it is best practice, and the implementation could be changed in the
future.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
---
 drivers/extcon/extcon-arizona.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c
index c121d01..1d8e0a5 100644
--- a/drivers/extcon/extcon-arizona.c
+++ b/drivers/extcon/extcon-arizona.c
@@ -185,7 +185,7 @@ static void arizona_extcon_hp_clamp(struct arizona_extcon_info *info,
 		break;
 	};
 
-	mutex_lock(&arizona->dapm->card->dapm_mutex);
+	snd_soc_dapm_mutex_lock(arizona->dapm);
 
 	arizona->hpdet_clamp = clamp;
 
@@ -227,7 +227,7 @@ static void arizona_extcon_hp_clamp(struct arizona_extcon_info *info,
 				 ret);
 	}
 
-	mutex_unlock(&arizona->dapm->card->dapm_mutex);
+	snd_soc_dapm_mutex_unlock(arizona->dapm);
 }
 
 static void arizona_extcon_set_mode(struct arizona_extcon_info *info, int mode)
-- 
2.1.4