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regmap: cache: Return error in cache sync operations for REGCACHE_NONE 

[ Upstream commit fd883d79e4 ]

There is no sense in doing a cache sync on REGCACHE_NONE regmaps.
Instead of panicking the kernel due to missing cache_ops, return an error
to client driver.

Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Link: https://lore.kernel.org/r/20230313071812.13577-1-alexander.stein@ew.tq-group.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Alexander Stein 2023-03-13 08:18:11 +01:00 committed by Greg Kroah-Hartman
parent d5138ad7ca
commit bb1616e105
1 changed files with 6 additions and 0 deletions
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6
drivers/base/regmap/regcache.c
View File

@ -343,6 +343,9 @@ int regcache_sync(struct regmap *map)
const char *name;
bool bypass;
if (WARN_ON(map->cache_type == REGCACHE_NONE))
return -EINVAL;
BUG_ON(!map->cache_ops);
map->lock(map->lock_arg);
@ -412,6 +415,9 @@ int regcache_sync_region(struct regmap *map, unsigned int min,
const char *name;
bool bypass;
if (WARN_ON(map->cache_type == REGCACHE_NONE))
return -EINVAL;
BUG_ON(!map->cache_ops);
map->lock(map->lock_arg);