regmap: fix regcache_reg_present() for empty cache
In the initial case when no reg_defaults values are
provided and no register value was added to the cache
yet, the cache_present bitmap is NULL. If this function
is invoked for any register it should return false
(i.e. the register is not cached) instead of true.
Signed-off-by: Ionut Nicu <ioan.nicu.ext@nsn.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/drivers/base/regmap/internal.h b/drivers/base/regmap/internal.h
index 29c8316..5308e3e 100644
--- a/drivers/base/regmap/internal.h
+++ b/drivers/base/regmap/internal.h
@@ -223,7 +223,7 @@
static inline bool regcache_reg_present(struct regmap *map, unsigned int reg)
{
if (!map->cache_present)
- return true;
+ return false;
if (reg > map->cache_present_nbits)
return false;
return map->cache_present[BIT_WORD(reg)] & BIT_MASK(reg);