diff options
| author | Mark Brown <broonie@kernel.org> | 2023-06-16 02:04:40 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2023-06-16 14:56:13 +0300 |
| commit | 3e47b8877d6c0f60943b00f3112756ca3b572cd6 (patch) | |
| tree | 46a3c5b8fbeb738654e6e01dddd3f41a47c21bc1 /drivers/base | |
| parent | 505cb70cd27abde24bd48b2c9a539cca485d722f (diff) | |
| download | linux-3e47b8877d6c0f60943b00f3112756ca3b572cd6.tar.xz | |
regmap: Drop early readability check
We have some drivers that have a use case for cached write only
registers, doing read/modify/writes on read only registers in order to
work more easily with bitfields. Go back to trying the cache before we
check if we can read from the device.
Fixes: eab5abdeb79f0 ("regmap: Check for register readability before checking cache during read")
Reported-by: Konrad Dybcio <konradybcio@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20230615-regmap-drop-early-readability-v1-1-8135094362de@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/regmap/regmap.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c index fad66b309ef9..89a7f1c459c1 100644 --- a/drivers/base/regmap/regmap.c +++ b/drivers/base/regmap/regmap.c @@ -2897,9 +2897,6 @@ static int _regmap_read(struct regmap *map, unsigned int reg, int ret; void *context = _regmap_map_get_context(map); - if (!regmap_readable(map, reg)) - return -EIO; - if (!map->cache_bypass) { ret = regcache_read(map, reg, val); if (ret == 0) @@ -2909,6 +2906,9 @@ static int _regmap_read(struct regmap *map, unsigned int reg, if (map->cache_only) return -EBUSY; + if (!regmap_readable(map, reg)) + return -EIO; + ret = map->reg_read(context, reg, val); if (ret == 0) { if (regmap_should_log(map)) |