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>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c
index f46e247912c..744ed145bfa 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);