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regmap: rbtree: Don't bother checking for noop updates

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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>
This commit is contained in:
Mark Brown 2013-02-21 18:01:54 +00:00
parent 6dbe51c251
commit 66baf40757
1 changed files with 0 additions and 5 deletions
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5
drivers/base/regmap/regcache-rbtree.c
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@ -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 {