diff --git a/net/openvswitch/flow_table.c b/net/openvswitch/flow_table.c
index 67d5b8c0fe79..1e0f9d193eb0 100644
--- a/net/openvswitch/flow_table.c
+++ b/net/openvswitch/flow_table.c
@@ -257,11 +257,13 @@ static int tbl_mask_array_realloc(struct flow_table *tbl, int size)
 			if (ovsl_dereference(old->masks[i]))
 				new->masks[new->count++] = old->masks[i];
 		}
-		call_rcu(&old->rcu, mask_array_rcu_cb);
 	}
 
 	rcu_assign_pointer(tbl->mask_array, new);
 
+	if (old)
+		call_rcu(&old->rcu, mask_array_rcu_cb);
+
 	return 0;
 }