Avoid useless caller

pkg/scheduler/algorithm/predicates/predicates.go

@@ -1298,11 +1298,11 @@ func getMatchingAntiAffinityTopologyPairsOfPod(newPod *v1.Pod, existingPod *v1.P
 
 	topologyMaps := newTopologyPairsMaps()
 	for _, term := range GetPodAntiAffinityTerms(affinity.PodAntiAffinity) {
-		namespaces := priorityutil.GetNamespacesFromPodAffinityTerm(existingPod, &term)
 		selector, err := metav1.LabelSelectorAsSelector(term.LabelSelector)
 		if err != nil {
 			return nil, err
 		}
+		namespaces := priorityutil.GetNamespacesFromPodAffinityTerm(existingPod, &term)
 		if priorityutil.PodMatchesTermsNamespaceAndSelector(newPod, namespaces, selector) {
 			if topologyValue, ok := node.Labels[term.TopologyKey]; ok {
 				pair := topologyPair{key: term.TopologyKey, value: topologyValue}