Commit 9a16ea90 authored Aug 20, 2015 by Markus Pargmann Committed by Mark Brown Aug 20, 2015

regmap: regmap_raw_read return error on !bus->read



Return -ENOTSUPP if map->bus->read is not implemented and we do not use
the cache. This code path would directly use bus->read would run into an
NULL pointer for the read function.

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: Mark Brown <broonie@kernel.org>

parent bc0195aa

drivers/base/regmap/regmap.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -2184,6 +2184,11 @@ int regmap_raw_read(struct regmap map, unsigned int reg, void val,

		if (regmap_volatile_range(map, reg, val_count) \|\| map->cache_bypass \|\|
		map->cache_type == REGCACHE_NONE) {
		if (!map->bus->read) {
		ret = -ENOTSUPP;
		goto out;
		}

		/* Physical block read if there's no cache involved */
		ret = _regmap_raw_read(map, reg, val, val_len);