openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

regmap: cache: Don't attempt to sync non-writeable registers 

In the regcache_default_sync, if a register isn't writeable, then
_regmap_write will return an error and the rest of the sync will be
aborted.  Avoid this by checking if a register is writeable before
trying to sync it.

Signed-off-by: Dylan Reid <dgreid@chromium.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Dylan Reid 2014-03-18 13:45:09 -07:00 committed by Mark Brown
parent 756173285e
commit 83f8475ce9
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/base/regmap/regcache.c
View File

@ -253,7 +253,8 @@ static int regcache_default_sync(struct regmap *map, unsigned int min,
unsigned int val;
int ret;
if (regmap_volatile(map, reg))
if (regmap_volatile(map, reg) ||
!regmap_writeable(map, reg))
continue;
ret = regcache_read(map, reg, &val);