net: In __netif_schedule() use WARN_ON instead of BUG_ON

Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/core/dev.c

@@ -1327,7 +1327,8 @@ static void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev)
 
 void __netif_schedule(struct Qdisc *q)
 {
-	BUG_ON(q == &noop_qdisc);
+	if (WARN_ON_ONCE(q == &noop_qdisc))
+		return;
 
 	if (!test_and_set_bit(__QDISC_STATE_SCHED, &q->state)) {
 		struct softnet_data *sd;