regmap: validate regmap_raw_read/write val_len

val_len should be a multiple of val_bytes. If it's not, error out early.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 004a08d54f07423f89fc90fb03cf4dec0987b09a..e6038bc5421012d4d3d15ea11cf8c713d7529ffb 100644 (file)
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -621,6 +621,9 @@ int regmap_raw_write(struct regmap *map, unsigned int reg,
 {
        int ret;
 
+       if (val_len % map->format.val_bytes)
+               return -EINVAL;
+
        map->lock(map);
 
        ret = _regmap_raw_write(map, reg, val, val_len);
@@ -779,6 +782,9 @@ int regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
        unsigned int v;
        int ret, i;
 
+       if (val_len % map->format.val_bytes)
+               return -EINVAL;
+
        map->lock(map);
 
        if (regmap_volatile_range(map, reg, val_count) || map->cache_bypass ||