regmap: Silence warning on invalid zero length read
Zero length reads make no sense in a regmap context and are likely to trigger bugs further down the stack so insert an error check, also silencing compiler warnings about use of ret in cases where we iterate per register. Reported-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
parent
04dc91ce2c
commit
fa3eec7791
|
@ -2180,6 +2180,8 @@ int regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
|
|||
return -EINVAL;
|
||||
if (reg % map->reg_stride)
|
||||
return -EINVAL;
|
||||
if (val_count == 0)
|
||||
return -EINVAL;
|
||||
|
||||
map->lock(map->lock_arg);
|
||||
|
||||
|
|
Loading…
Reference in a new issue