IB/cm: Destroy idr as part of the module init error flow

Clean the idr as part of the error flow since it is a resource too.
Signed-off-by: Dotan Barak <dotanb@dev.mellanox.co.il>
Reviewed-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

drivers/infiniband/core/cm.c

@@ -3848,24 +3848,28 @@ static int __init ib_cm_init(void)
 	INIT_LIST_HEAD(&cm.timewait_list);
 
 	ret = class_register(&cm_class);
-	if (ret)
-		return -ENOMEM;
+	if (ret) {
+		ret = -ENOMEM;
+		goto error1;
+	}
 
 	cm.wq = create_workqueue("ib_cm");
 	if (!cm.wq) {
 		ret = -ENOMEM;
-		goto error1;
+		goto error2;
 	}
 
 	ret = ib_register_client(&cm_client);
 	if (ret)
-		goto error2;
+		goto error3;
 
 	return 0;
-error2:
+error3:
 	destroy_workqueue(cm.wq);
-error1:
+error2:
 	class_unregister(&cm_class);
+error1:
+	idr_destroy(&cm.local_id_table);
 	return ret;
 }