qeth: HiperSockets layer-3 interface drop non IPv4 or non IPv6 packets

HiperSockets infrastructure (layer-3 mode) supports only IPv4 or
IPv6 packets. Sending other packet types disturbs TCP/IP on z/VM,
which issues messages about invalid packets.
Qeth send routine will detect packet type on sending over a
HiperSockets interface (in layer-3 mode) and drop non IP packets.
The error and drop count of the interface is incremented.
Signed-off-by: NKlaus D. Wacker <kdwacker@de.ibm.com>
Signed-off-by: NUrsula Braun <braunu@de.ibm.com>
Signed-off-by: NJeff Garzik <jeff@garzik.org>

drivers/s390/net/qeth_main.c

@@ -4719,8 +4719,8 @@ qeth_send_packet(struct qeth_card *card, struct sk_buff *skb)
 		rc = qeth_do_send_packet(card, queue, new_skb, hdr,
 					 elements_needed, ctx);
 	else {
-		if ((skb->protocol == htons(ETH_P_ARP)) &&
-		    (card->dev->flags & IFF_NOARP)) {
+		if ((!card->options.layer2) &&
+		    (ipv == 0)) {
 			__qeth_free_new_skb(skb, new_skb);
 			return -EPERM;
 		}