diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 20452c110d7d4e1ce96db6b6af2f4c797c2c1e63..fa48051484b87192f3d4e14dce90deb40e90f9e6 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -2242,6 +2242,7 @@ static int find_desired_extent(struct inode *inode, loff_t *offset, int origin)
 	if (lockend <= lockstart)
 		lockend = lockstart + root->sectorsize;
 
+	lockend--;
 	len = lockend - lockstart + 1;
 
 	len = max_t(u64, len, root->sectorsize);