no need check is nil, because has check before here

plugin/pkg/scheduler/algorithm/priorities/node_prefer_avoid_pods.go

@@ -51,11 +51,9 @@ func CalculateNodePreferAvoidPodsPriorityMap(pod *v1.Pod, meta interface{}, node
 	}
 	for i := range avoids.PreferAvoidPods {
 		avoid := &avoids.PreferAvoidPods[i]
-		if controllerRef != nil {
 		if avoid.PodSignature.PodController.Kind == controllerRef.Kind && avoid.PodSignature.PodController.UID == controllerRef.UID {
 			return schedulerapi.HostPriority{Host: node.Name, Score: 0}, nil
 		}
 	}
-	}
 	return schedulerapi.HostPriority{Host: node.Name, Score: 10}, nil
 }