btrfs-progs: disk-io: Support commit transaction on chunk tree

As chunk tree is only stored in super block, chunk tree commit doesn't
need to go through tree root update.
Or a BUG_ON will be triggered.

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/disk-io.c b/disk-io.c
index 6a538433..fdcfd6dd 100644
--- a/disk-io.c
+++ b/disk-io.c
@@ -571,6 +571,8 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
 		goto commit_tree;
 	if (root == root->fs_info->tree_root)
 		goto commit_tree;
+	if (root == root->fs_info->chunk_root)
+		goto commit_tree;
 
 	free_extent_buffer(root->commit_root);
 	root->commit_root = NULL;