Pass new and old object to DropDisabledFields

pkg/api/persistentvolumeclaim/util.go

@@ -24,8 +24,11 @@ import (
 
 // DropDisabledFields removes disabled fields from the pvc spec.
 // This should be called from PrepareForCreate/PrepareForUpdate for all resources containing a pvc spec.
-func DropDisabledFields(pvcSpec *core.PersistentVolumeClaimSpec) {
+func DropDisabledFields(pvcSpec, oldPVCSpec *core.PersistentVolumeClaimSpec) {
 	if !utilfeature.DefaultFeatureGate.Enabled(features.BlockVolume) {
 		pvcSpec.VolumeMode = nil
+		if oldPVCSpec != nil {
+			oldPVCSpec.VolumeMode = nil
+		}
 	}
 }