regcache: Make sure we sync register 0 in an rbtree cache
Most of the current users have register 0 as a volatile register or don't
have a register 0 so it's not been apparent that it's not getting synced.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/drivers/base/regmap/regcache-rbtree.c b/drivers/base/regmap/regcache-rbtree.c
index 32620c4..861ad2c 100644
--- a/drivers/base/regmap/regcache-rbtree.c
+++ b/drivers/base/regmap/regcache-rbtree.c
@@ -377,7 +377,7 @@
/* Is this the hardware default? If so skip. */
ret = regcache_lookup_reg(map, i);
- if (ret > 0 && val == map->reg_defaults[ret].def)
+ if (ret >= 0 && val == map->reg_defaults[ret].def)
continue;
map->cache_bypass = 1;