regmap: Check readable regs in _regmap_read

Check if regs are readable. Signed-off-by: Michal Simek <michal.simek@xilinx.com> Signed-off-by: Mark Brown <broonie@linaro.org>
git-mirror · Feb 11, 2014 · d4807ad · d4807ad
1 parent 676970d
commit d4807ad
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
@@ -1736,6 +1736,9 @@ static int _regmap_read(struct regmap *map, unsigned int reg,
 	if (map->cache_only)
 		return -EBUSY;
 
+	if (!regmap_readable(map, reg))
+		return -EIO;
+
 	ret = map->reg_read(context, reg, val);
 	if (ret == 0) {
 #ifdef LOG_DEVICE