1 files changed, 14 insertions, 4 deletions

diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 934bc094bf17..1e8c024c69c3 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -746,6 +746,7 @@ int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
         u64 other_end;
         u64 split = start;
         u64 locked_end = end;
+        u64 orig_parent;
         int extent_type;
         int split_end = 1;
         int ret;
@@ -890,6 +891,12 @@ again:
         }
 
         btrfs_mark_buffer_dirty(leaf);
+
+        orig_parent = leaf->start;
+        ret = btrfs_inc_extent_ref(trans, root, bytenr, num_bytes,
+                                   orig_parent, root->root_key.objectid,
+                                   trans->transid, inode->i_ino);
+        BUG_ON(ret);
         btrfs_release_path(root, path);
 
         key.offset = start;
@@ -910,10 +917,13 @@ again:
         btrfs_set_file_extent_encryption(leaf, fi, 0);
         btrfs_set_file_extent_other_encoding(leaf, fi, 0);
 
-        ret = btrfs_inc_extent_ref(trans, root, bytenr, num_bytes,
-                                   leaf->start, root->root_key.objectid,
-                                   trans->transid, inode->i_ino);
-        BUG_ON(ret);
+        if (orig_parent != leaf->start) {
+                ret = btrfs_update_extent_ref(trans, root, bytenr,
+                                              orig_parent, leaf->start,
+                                              root->root_key.objectid,
+                                              trans->transid, inode->i_ino);
+                BUG_ON(ret);
+        }
 done:
         btrfs_mark_buffer_dirty(leaf);
         btrfs_release_path(root, path);