regmap: Skip patch application when the cache is not dirty on sync

On the basis that if we don't actually need to resync the cache then the
patches are probably also already applied.

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

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c
index ce2034c10ffb..9c6a5c13f1da 100644
--- a/drivers/base/regmap/regcache.c
+++ b/drivers/base/regmap/regcache.c
@@ -269,6 +269,9 @@ int regcache_sync(struct regmap *map)
         name = map->cache_ops->name;
         trace_regcache_sync(map->dev, name, "start");
 
+        if (!map->cache_dirty)
+                goto out;
+
         /* Apply any patch first */
         for (i = 0; i < map->patch_regs; i++) {
                 ret = _regmap_write(map, map->patch[i].reg, map->patch[i].def);
@@ -279,8 +282,6 @@ int regcache_sync(struct regmap *map)
                 }
         }
 
-        if (!map->cache_dirty)
-                goto out;
         if (map->cache_ops->sync) {
                 ret = map->cache_ops->sync(map);
         } else {