diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/base/regmap/regmap.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index 7d4dc11ad86c..e57f10f485a1 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -211,6 +211,13 @@ static int _regmap_raw_write(struct regmap *map, unsigned int reg, void *buf; int ret = -ENOTSUPP; size_t len; + int i; + + /* Check for unwritable registers before we start */ + if (map->writeable_reg) + for (i = 0; i < val_len / map->format.val_bytes; i++) + if (!map->writeable_reg(map->dev, reg + i)) + return -EINVAL; map->format.format_reg(map->work_buf, reg); |