[PATCH] regmap: Allow rbtree to cache zero default values

[Mark Brown]

Ensure that when we start up in cache only mode we can store defaults of
zero, otherwise if the hardware is unavailable we won't be able to read.

Signed-off-by: Mark Brown <broonie@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
---
 drivers/base/regmap/regcache-rbtree.c |    3 ---
 1 files changed, 0 insertions(+), 3 deletions(-)

diff --git a/drivers/base/regmap/regcache-rbtree.c b/drivers/base/regmap/regcache-rbtree.c
index e04e36e..e314984 100644
--- a/drivers/base/regmap/regcache-rbtree.c
+++ b/drivers/base/regmap/regcache-rbtree.c
@@ -252,9 +252,6 @@ static int regcache_rbtree_write(struct regmap *map, unsigned int reg,
 		regcache_rbtree_set_register(rbnode, reg_tmp, value,
 					     map->cache_word_size);
 	} else {
-		/* bail out early, no need to create the rbnode yet */
-		if (!value)
-			return 0;
 		/* look for an adjacent register to the one we are about to add */
 		for (node = rb_first(&rbtree_ctx->root); node;
 		     node = rb_next(node)) {
-- 
1.7.6.3

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