s390: qeth driver connection hang

      Frank Pavlic <fpavlic@de.ibm.com>

Connection hangs when using EDDP mode because sk_protocol is NULL
when skb has been copied via skb_copy. This results in dropping
packets.
Also keep MAC address after recovery of Virtual NICs so that
traffic can flow again and duplicate statements in
qeth_dev_set_route_store removed.
Signed-off-by: Ursula Braun <braunu@de.ibm.com>
Signed-off-by: Frank Pavlic <fpavlic@de.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

drivers/s390/net/qeth_eddp.c

@@ -620,10 +620,10 @@ qeth_eddp_create_context_tcp(struct qeth_card *card, struct sk_buff *skb,
 
 struct qeth_eddp_context *
 qeth_eddp_create_context(struct qeth_card *card, struct sk_buff *skb,
-			 struct qeth_hdr *qhdr)
+			 struct qeth_hdr *qhdr, unsigned char sk_protocol)
 {
 	QETH_DBF_TEXT(trace, 5, "creddpc");
-	switch (skb->sk->sk_protocol){
+	switch (sk_protocol) {
 	case IPPROTO_TCP:
 		return qeth_eddp_create_context_tcp(card, skb, qhdr);
 	default:

drivers/s390/net/qeth_eddp.h

@@ -34,7 +34,8 @@ struct qeth_eddp_context_reference {
 };
 
 extern struct qeth_eddp_context *
-qeth_eddp_create_context(struct qeth_card *,struct sk_buff *,struct qeth_hdr *);
+qeth_eddp_create_context(struct qeth_card *,struct sk_buff *,
+			 struct qeth_hdr *, unsigned char);
 
 extern void
 qeth_eddp_put_context(struct qeth_eddp_context *);

drivers/s390/net/qeth_main.c

@@ -4490,7 +4490,8 @@ qeth_send_packet(struct qeth_card *card, struct sk_buff *skb)
 		qeth_fill_header(card, hdr, new_skb, ipv, cast_type);
 	}
 	if (large_send == QETH_LARGE_SEND_EDDP) {
-		ctx = qeth_eddp_create_context(card, new_skb, hdr);
+		ctx = qeth_eddp_create_context(card, new_skb, hdr,
+					       skb->sk->sk_protocol);
 		if (ctx == NULL) {
 			__qeth_free_new_skb(skb, new_skb);
 			PRINT_WARN("could not create eddp context\n");
@@ -6651,7 +6652,7 @@ qeth_setadpparms_change_macaddr_cb(struct qeth_card *card,
 	QETH_DBF_TEXT(trace,4,"chgmaccb");
 
 	cmd = (struct qeth_ipa_cmd *) data;
-	if (!card->options.layer2 || card->info.guestlan ||
+	if (!card->options.layer2 ||
 	    !(card->info.mac_bits & QETH_LAYER2_MAC_READ)) {
 		memcpy(card->dev->dev_addr,
 		       &cmd->data.setadapterparms.data.change_addr.addr,

drivers/s390/net/qeth_sys.c

@@ -384,8 +384,6 @@ qeth_dev_route_store(struct qeth_card *card, struct qeth_routing_info *route,
 		route->type = PRIMARY_CONNECTOR;
 	} else if (!strcmp(tmp, "secondary_connector")) {
 		route->type = SECONDARY_CONNECTOR;
-	} else if (!strcmp(tmp, "multicast_router")) {
-		route->type = MULTICAST_ROUTER;
 	} else if (!strcmp(tmp, "primary_router")) {
 		route->type = PRIMARY_ROUTER;
 	} else if (!strcmp(tmp, "secondary_router")) {