From mboxrd@z Thu Jan 1 00:00:00 1970 From: frank.blaschka@de.ibm.com Subject: [patch 4/8] qeth: CCL-sequence numbers required for protocol ETH_P_802_2 only Date: Tue, 01 Apr 2008 10:26:56 +0200 Message-ID: <20080401082742.852685000@de.ibm.com> References: <20080401082652.754871000@de.ibm.com> Cc: netdev@vger.kernel.org, linux-s390@vger.kernel.org, Ursula Braun To: jgarzik@pobox.com Return-path: Received: from mtagate7.de.ibm.com ([195.212.29.156]:4279 "EHLO mtagate7.de.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754118AbYDAI1p (ORCPT ); Tue, 1 Apr 2008 04:27:45 -0400 Content-Disposition: inline; filename=04-qeth_ccl_sequence.patch Sender: netdev-owner@vger.kernel.org List-ID: From: Ursula Braun 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 Signed-off-by: Frank Blaschka --- 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; --