From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1422710AbaD3PJa (ORCPT ); Wed, 30 Apr 2014 11:09:30 -0400 Received: from p3plsmtps2ded01.prod.phx3.secureserver.net ([208.109.80.58]:47672 "EHLO p3plsmtps2ded01.prod.phx3.secureserver.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758872AbaD3PJ3 (ORCPT ); Wed, 30 Apr 2014 11:09:29 -0400 x-originating-ip: 72.167.245.219 From: "K. Y. Srinivasan" To: davem@davemloft.net, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, devel@linuxdriverproject.org, olaf@aepfle.de, apw@canonical.com, jasowang@redhat.com Cc: "K. Y. Srinivasan" , stable@kernel.org Subject: [PATCH V2 net-next 1/1] hyperv: Properly handle checksum offload Date: Wed, 30 Apr 2014 09:05:21 -0700 Message-Id: <1398873921-20955-1-git-send-email-kys@microsoft.com> X-Mailer: git-send-email 1.7.4.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Do checksum offload only if the client of the driver wants checksum to be offloaded. In V1 version of this patch, I addressed comments from Stephen Hemminger and Eric Dumazet . In this version of the patch I have addressed comments from David Miller. This patch fixes a bug that is exposed in gateway scenarios. Signed-off-by: K. Y. Srinivasan Reviewed-by: Haiyang Zhang Cc: stable@kernel.org --- drivers/net/hyperv/netvsc_drv.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c index 939e3af..64c7816 100644 --- a/drivers/net/hyperv/netvsc_drv.c +++ b/drivers/net/hyperv/netvsc_drv.c @@ -467,6 +467,10 @@ static int netvsc_start_xmit(struct sk_buff *skb, struct net_device *net) if (skb_is_gso(skb)) goto do_lso; + if ((skb->ip_summed == CHECKSUM_NONE) || + (skb->ip_summed == CHECKSUM_UNNECESSARY)) + goto do_send; + rndis_msg_size += NDIS_CSUM_PPI_SIZE; ppi = init_ppi_data(rndis_msg, NDIS_CSUM_PPI_SIZE, TCPIP_CHKSUM_PKTINFO); -- 1.7.4.1