[PATCH] btrfs: scrub: Remove compilation errors when -Werror=maybe-uninitialized

[<ye.xingchen@zte.com.cn>]

From: ye xingchen <ye.xingchen@zte.com.cn>

fs/btrfs/scrub.c: In function
'scrub_raid56_data_stripe_for_parity.isa.0':
fs/btrfs/scrub.c:3297:9 error: 'ret' may be used uninitialized in this
function [-Werror=maybe-uninitialized]

fs/btrfs/scrub.c: In function
'scrub_simple_mirror':
fs/btrfs/scrub.c:3530:9 error: 'ret' may be used uninitialized in this
function [-Werror=maybe-uninitialized]

Initialize 'ret' to aviod compilation errors.

Signed-off-by: ye xingchen <ye.xingchen@zte.com.cn>
---
 fs/btrfs/scrub.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c
index a5d026041be4..d0ddf930cb79 100644
--- a/fs/btrfs/scrub.c
+++ b/fs/btrfs/scrub.c
@@ -3198,7 +3198,7 @@ static int scrub_raid56_data_stripe_for_parity(struct scrub_ctx *sctx,
 	struct btrfs_root *extent_root = btrfs_extent_root(fs_info, logical);
 	struct btrfs_root *csum_root = btrfs_csum_root(fs_info, logical);
 	u64 cur_logical = logical;
-	int ret;
+	int ret = 0;

 	ASSERT(map->type & BTRFS_BLOCK_GROUP_RAID56_MASK);

@@ -3424,7 +3424,7 @@ static int scrub_simple_mirror(struct scrub_ctx *sctx,
 	const u32 max_length = SZ_64K;
 	struct btrfs_path path = { 0 };
 	u64 cur_logical = logical_start;
-	int ret;
+	int ret = 0;

 	/* The range must be inside the bg */
 	ASSERT(logical_start >= bg->start && logical_end <= bg->start + bg->length);
-- 
2.25.1