[PATCH] regmap: Check readable regs in _regmap_read

[Michal Simek]

Check if regs are readable.

Signed-off-by: Michal Simek <michal.si...@xilinx.com>
---

 drivers/base/regmap/regmap.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 6a19515..7569dfc 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -1725,6 +1725,9 @@ static int _regmap_read(struct regmap *map, unsigned int 
reg,
        int ret;
        void *context = _regmap_map_get_context(map);

+       if (!regmap_readable(map, reg))
+               return -EIO;
+
        WARN_ON(!map->reg_read);

        if (!map->cache_bypass) {
--
1.8.2.3

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