regmap: cache: Make sure to sync the last register in a block

commit 2d49b5987561e480bdbd8692b27fc5f49a1e2f0b upstream.

regcache_sync_block_raw_flush() expects the address of the register after last
register that needs to be synced as its parameter. But the last call to
regcache_sync_block_raw_flush() in regcache_sync_block_raw() passes the address
of the last register in the block. This effectively always skips over the last
register in a block, even if it needs to be synced. In order to fix it increase
the address by one register.

The issue was introduced in commit 75a5f89 ("regmap: cache: Write consecutive
registers in a single block write").

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c
index 507ee2da0f6e..46283fd3c4c0 100644
--- a/drivers/base/regmap/regcache.c
+++ b/drivers/base/regmap/regcache.c
@@ -644,7 +644,8 @@ static int regcache_sync_block_raw(struct regmap *map, void *block,
                 }
         }
 
-        return regcache_sync_block_raw_flush(map, &data, base, regtmp);
+        return regcache_sync_block_raw_flush(map, &data, base, regtmp +
+                        map->reg_stride);
 }
 
 int regcache_sync_block(struct regmap *map, void *block,