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authorMark Brown <broonie@opensource.wolfsonmicro.com>2013-02-21 22:01:54 +0400
committerMark Brown <broonie@opensource.wolfsonmicro.com>2013-03-04 06:30:27 +0400
commit66baf407571662f7e2a22dd0764cbe279559446c (patch)
treea6eb3af5c0766c8ef9b105e885ae874b9806f515 /drivers/base/regmap/regcache-rbtree.c
parent6dbe51c251a327e012439c4772097a13df43c5b8 (diff)
downloadlinux-66baf407571662f7e2a22dd0764cbe279559446c.tar.xz
regmap: rbtree: Don't bother checking for noop updates
If we're updating a value in place it's more work to read the value and compare the value with what we're about to set than it is to just write the value into the cache; there are no further operations after writing in the code even though there's an early return here. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers/base/regmap/regcache-rbtree.c')
-rw-r--r--drivers/base/regmap/regcache-rbtree.c5
1 files changed, 0 insertions, 5 deletions
diff --git a/drivers/base/regmap/regcache-rbtree.c b/drivers/base/regmap/regcache-rbtree.c
index e6732cf7c06e..3f21c6ab296f 100644
--- a/drivers/base/regmap/regcache-rbtree.c
+++ b/drivers/base/regmap/regcache-rbtree.c
@@ -302,7 +302,6 @@ static int regcache_rbtree_write(struct regmap *map, unsigned int reg,
struct regcache_rbtree_ctx *rbtree_ctx;
struct regcache_rbtree_node *rbnode, *rbnode_tmp;
struct rb_node *node;
- unsigned int val;
unsigned int reg_tmp;
unsigned int pos;
int i;
@@ -315,10 +314,6 @@ static int regcache_rbtree_write(struct regmap *map, unsigned int reg,
rbnode = regcache_rbtree_lookup(map, reg);
if (rbnode) {
reg_tmp = (reg - rbnode->base_reg) / map->reg_stride;
- val = regcache_rbtree_get_register(rbnode, reg_tmp,
- map->cache_word_size);
- if (val == value)
- return 0;
regcache_rbtree_set_register(rbnode, reg_tmp, value,
map->cache_word_size);
} else {