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Diffstat (limited to 'drivers/base/regmap/regmap.c')
-rw-r--r--drivers/base/regmap/regmap.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index e0d0c7d8a5c5..0e85367e504d 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -1261,6 +1261,9 @@ int _regmap_write(struct regmap *map, unsigned int reg,
int ret;
void *context = _regmap_map_get_context(map);
+ if (!regmap_writeable(map, reg))
+ return -EIO;
+
if (!map->cache_bypass && !map->defer_caching) {
ret = regcache_write(map, reg, val);
if (ret != 0)