[<prev] [next>] [<thread-prev] [thread-next>] [month] [year] [list]
Date: Tue, 01 Apr 2008 10:26:56 +0200
From: frank.blaschka@...ibm.com
To: jgarzik@...ox.com
Subject: [patch 4/8] qeth: CCL-sequence numbers required for protocol ETH_P_802_2 only
From: Ursula Braun <braunu@...ibm.com>
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@...ibm.com>
Signed-off-by: Frank Blaschka <frank.blaschka@...ibm.com>
---
drivers/s390/net/qeth_l2_main.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
Index: git_davem-2.6.26/drivers/s390/net/qeth_l2_main.c
===================================================================
--- git_davem-2.6.26.orig/drivers/s390/net/qeth_l2_main.c 2008-03-26 09:21:08.000000000 +0100
+++ git_davem-2.6.26/drivers/s390/net/qeth_l2_main.c 2008-03-31 11:19:36.000000000 +0200
@@ -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;
--
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Hosted by DataForce ISP -
Powered by Openwall GNU/*/Linux