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| author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-01-25 22:05:48 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-01-25 22:22:05 +0100 |
| commit | 8a892d6996b60c822f19ad1844eb15b96ce393c7 (patch) | |
| tree | e3b2281798d9188cb69f21ff9d965d1073a69957 /drivers/base | |
| parent | regmap: Skip patch application when the cache is not dirty on sync (diff) | |
| download | linux-8a892d6996b60c822f19ad1844eb15b96ce393c7.tar.xz linux-8a892d6996b60c822f19ad1844eb15b96ce393c7.zip | |
regmap: Bypass the cache when applying patches
Otherwise any patch that affects a register which is writable may trash
cached values.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/regmap/regcache.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c index 9c6a5c13f1da..ee36bed9479c 100644 --- a/drivers/base/regmap/regcache.c +++ b/drivers/base/regmap/regcache.c @@ -273,6 +273,7 @@ int regcache_sync(struct regmap *map) goto out; /* Apply any patch first */ + map->cache_bypass = 1; for (i = 0; i < map->patch_regs; i++) { ret = _regmap_write(map, map->patch[i].reg, map->patch[i].def); if (ret != 0) { @@ -281,6 +282,7 @@ int regcache_sync(struct regmap *map) goto out; } } + map->cache_bypass = 0; if (map->cache_ops->sync) { ret = map->cache_ops->sync(map); |