From 38f6916976f9e964748f097be3688e334fb60f3d Mon Sep 17 00:00:00 2001
From: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
Date: Wed, 28 Sep 2011 11:43:45 +0100
Subject: regmap: Grab the lock in regcache_cache_only()

Signed-off-by: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c
index f46e247..744ed145 100644
--- a/drivers/base/regmap/regcache.c
+++ b/drivers/base/regmap/regcache.c
@@ -273,7 +273,9 @@ EXPORT_SYMBOL_GPL(regcache_sync);
  */
 void regcache_cache_only(struct regmap *map, bool enable)
 {
+	mutex_lock(&map->sync_lock);
 	map->cache_only = enable;
+	mutex_unlock(&map->sync_lock);
 }
 EXPORT_SYMBOL_GPL(regcache_cache_only);
 
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