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>

diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c
index ce2034c10ffb94d55b31bf0cd83379a44acc82d8..9c6a5c13f1daca7c1203a5a1b7e31e7fa98af181 100644 (file)
--- 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 {