diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index bd09ad1fed07b..3a87f928d9ce6 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -2193,25 +2193,22 @@ int btrfs_bio_fits_in_stripe(struct page *page, size_t size, struct bio *bio,
 	struct inode *inode = page->mapping->host;
 	struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
 	u64 logical = bio->bi_iter.bi_sector << 9;
+	u32 bio_len = bio->bi_iter.bi_size;
 	struct extent_map *em;
-	u64 length = 0;
-	u64 map_length;
 	int ret = 0;
 	struct btrfs_io_geometry geom;
 
 	if (bio_flags & EXTENT_BIO_COMPRESSED)
 		return 0;
 
-	length = bio->bi_iter.bi_size;
-	map_length = length;
-	em = btrfs_get_chunk_map(fs_info, logical, map_length);
+	em = btrfs_get_chunk_map(fs_info, logical, fs_info->sectorsize);
 	if (IS_ERR(em))
 		return PTR_ERR(em);
 	ret = btrfs_get_io_geometry(fs_info, em, btrfs_op(bio), logical, &geom);
 	if (ret < 0)
 		goto out;
 
-	if (geom.len < length + size)
+	if (geom.len < bio_len + size)
 		ret = 1;
 out:
 	free_extent_map(em);