qeth: CCL-sequence numbers required for protocol ETH_P_802_2 only
Symptom: slow CCL response time
Problem: non-ETH_P_802_2 packets are not delivered to NDH for
CCL. But CCL detects missing sequence numbers, which
cause a serious performance problem with CCL.
Solution: assign sequence numbers only to 802.2 packets.
Signed-off-by: Ursula Braun <braunu@de.ibm.com>
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c
index 4417a36..0263d94 100644
--- a/drivers/s390/net/qeth_l2_main.c
+++ b/drivers/s390/net/qeth_l2_main.c
@@ -451,7 +451,8 @@
skb->ip_summed = CHECKSUM_UNNECESSARY;
else
skb->ip_summed = CHECKSUM_NONE;
- *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
+ if (skb->protocol == htons(ETH_P_802_2))
+ *((__u32 *)skb->cb) = ++card->seqno.pkt_seqno;
len = skb->len;
netif_rx(skb);
break;