[NET_SCHED]: sch_ingress: return proper error code in ingress_graft()

Signed-off-by: NPatrick McHardy <kaber@trash.net>
Acked-by: NJamal Hadi Salim <hadi@cyberus.ca>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/sched/sch_ingress.c

@@ -35,7 +35,7 @@ struct ingress_qdisc_data {
 static int ingress_graft(struct Qdisc *sch, unsigned long arg,
 			 struct Qdisc *new, struct Qdisc **old)
 {
-	return 1;
+	return -EOPNOTSUPP;
 }
 
 static struct Qdisc *ingress_leaf(struct Qdisc *sch, unsigned long arg)