llc: avoid skb_clone() if there is only one handler

	 * LLC functionality

	 */

	rcv = rcu_dereference(sap->rcv_func);

	dest = llc_pdu_type(skb);

	if (unlikely(!dest || !llc_type_handlers[dest - 1])) {

		if (rcv)

			rcv(skb, dev, pt, orig_dev);

		else

			kfree_skb(skb);

	} else {

		if (rcv) {

			struct sk_buff *cskb = skb_clone(skb, GFP_ATOMIC);

			if (cskb)

				rcv(cskb, dev, pt, orig_dev);

		}

	dest = llc_pdu_type(skb);

	if (unlikely(!dest || !llc_type_handlers[dest - 1]))

		goto drop_put;

		llc_type_handlers[dest - 1](sap, skb);

out_put:

	}

	llc_sap_put(sap);

out:

	return 0;

drop:

	kfree_skb(skb);

	goto out;

drop_put:

	kfree_skb(skb);

	goto out_put;

handle_station:

	if (!llc_station_handler)

		goto drop;