ocfs2: fix leaks on failure exits in module_init

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/ocfs2/super.c

@@ -1624,21 +1624,17 @@ static int __init ocfs2_init(void)
 		init_waitqueue_head(&ocfs2__ioend_wq[i]);
 
 	status = init_ocfs2_uptodate_cache();
-	if (status < 0) {
-		mlog_errno(status);
-		goto leave;
-	}
+	if (status < 0)
+		goto out1;
 
 	status = ocfs2_initialize_mem_caches();
-	if (status < 0) {
-		mlog_errno(status);
-		goto leave;
-	}
+	if (status < 0)
+		goto out2;
 
 	ocfs2_wq = create_singlethread_workqueue("ocfs2_wq");
 	if (!ocfs2_wq) {
 		status = -ENOMEM;
-		goto leave;
+		goto out3;
 	}
 
 	ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
@@ -1650,17 +1646,23 @@ static int __init ocfs2_init(void)
 	ocfs2_set_locking_protocol();
 
 	status = register_quota_format(&ocfs2_quota_format);
-leave:
-	if (status < 0) {
-		ocfs2_free_mem_caches();
-		exit_ocfs2_uptodate_cache();
-		mlog_errno(status);
-	}
+	if (status < 0)
+		goto out4;
+	status = register_filesystem(&ocfs2_fs_type);
+	if (!status)
+		return 0;
 
-	if (status >= 0) {
-		return register_filesystem(&ocfs2_fs_type);
-	} else
-		return -1;
+	unregister_quota_format(&ocfs2_quota_format);
+out4:
+	destroy_workqueue(ocfs2_wq);
+	debugfs_remove(ocfs2_debugfs_root);
+out3:
+	ocfs2_free_mem_caches();
+out2:
+	exit_ocfs2_uptodate_cache();
+out1:
+	mlog_errno(status);
+	return status;
 }
 
 static void __exit ocfs2_exit(void)