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Commit bb2bb45d authored by Mark Brown's avatar Mark Brown
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regmap: Return an error if a caller attempts to do an unsupported raw read 



regmaps without raw I/O access can't implement raw I/O operations,
return an error if someone tries to do that rather than crashing.

Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 922a9f93

drivers/base/regmap/regmap.c

+3 −0
Original line number Diff line number Diff line
@@ -2255,6 +2255,9 @@ static int _regmap_raw_read(struct regmap *map, unsigned int reg, void *val, 


	WARN_ON(!map->bus);



	if (!map->bus || !map->bus->read)

		return -EINVAL;



	range = _regmap_range_lookup(map, reg);

	if (range) {

		ret = _regmap_select_page(map, &reg, range,