One of the reasons for using a cache is to have a software shadow of a register which is writable but not readable. This allows us to do a read-modify-write operation on such a register. Currently regcache checks whether a register is readable when performing a cached read and returns an error if not. Change this check to test whether the register is writable. This makes more sense, since reading from the cache when the register is not readable allows the operation described above, but if the register is not writable there shouldn't be a value for it in the cache anyway. Signed-off-by: Lars-Peter Clausen <lars@xxxxxxxxxx> --- drivers/base/regmap/regcache.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c index 6f0dbc0..a004a7a 100644 --- a/drivers/base/regmap/regcache.c +++ b/drivers/base/regmap/regcache.c @@ -206,7 +206,7 @@ int regcache_read(struct regmap *map, BUG_ON(!map->cache_ops); - if (!regmap_readable(map, reg)) + if (!regmap_writeable(map, reg)) return -EIO; if (!regmap_volatile(map, reg)) -- 1.7.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
