btrfs-progs: no BUG_ON in close_ctree

There's no reason for it.

Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/disk-io.h b/disk-io.h
index d860ff2..d6fb982 100644 (file)
--- a/disk-io.h
+++ b/disk-io.h
@@ -123,7 +123,8 @@ struct btrfs_fs_info *open_ctree_fs_info(const char *filename,
 int close_ctree_fs_info(struct btrfs_fs_info *fs_info);
 static inline int close_ctree(struct btrfs_root *root)
 {
-       BUG_ON(!root);
+       if (!root)
+               return 0;
        return close_ctree_fs_info(root->fs_info);
 }