diff --git a/kernel-shared/extent-tree.c b/kernel-shared/extent-tree.c
index 0b0c40af..4c6ad64f 100644
--- a/kernel-shared/extent-tree.c
+++ b/kernel-shared/extent-tree.c
@@ -3308,7 +3308,7 @@ out:
 
 static u64 get_dev_extent_len(struct map_lookup *map)
 {
-	int div;
+	int div = 1;
 
 	switch (map->type & BTRFS_BLOCK_GROUP_PROFILE_MASK) {
 	case 0: /* Single */
@@ -3316,7 +3316,7 @@ static u64 get_dev_extent_len(struct map_lookup *map)
 	case BTRFS_BLOCK_GROUP_RAID1:
 	case BTRFS_BLOCK_GROUP_RAID1C3:
 	case BTRFS_BLOCK_GROUP_RAID1C4:
-		div = 1;
+		/* The default value can already handle it. */
 		break;
 	case BTRFS_BLOCK_GROUP_RAID5:
 	case BTRFS_BLOCK_GROUP_RAID6:
diff --git a/kernel-shared/volumes.c b/kernel-shared/volumes.c
index 65147d06..1e2c8895 100644
--- a/kernel-shared/volumes.c
+++ b/kernel-shared/volumes.c
@@ -2758,6 +2758,7 @@ u64 btrfs_stripe_length(struct btrfs_fs_info *fs_info,
 		      BTRFS_BLOCK_GROUP_PROFILE_MASK;
 
 	chunk_len = btrfs_chunk_length(leaf, chunk);
+	stripe_len = chunk_len;
 
 	switch (profile) {
 	case 0: /* Single profile */
@@ -2765,7 +2766,7 @@ u64 btrfs_stripe_length(struct btrfs_fs_info *fs_info,
 	case BTRFS_BLOCK_GROUP_RAID1C3:
 	case BTRFS_BLOCK_GROUP_RAID1C4:
 	case BTRFS_BLOCK_GROUP_DUP:
-		stripe_len = chunk_len;
+		/* The default value is already fine. */
 		break;
 	case BTRFS_BLOCK_GROUP_RAID0:
 		stripe_len = chunk_len / num_stripes;