linux-kernel - [PATCH 5.9 001/757] ibmveth: Switch order of ibmveth

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Message-Id: <20201027135450.579883578@linuxfoundation.org>
Date:   Tue, 27 Oct 2020 14:44:11 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, David Wilder <dwilder@...ibm.com>,
        Thomas Falcon <tlfalcon@...ux.ibm.com>,
        Cristobal Forno <cris.forno@....com>,
        Pradeep Satyanarayana <pradeeps@...ux.vnet.ibm.com>,
        Willem de Bruijn <willemb@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>
Subject: [PATCH 5.9 001/757] ibmveth: Switch order of ibmveth_helper calls.

From: David Wilder <dwilder@...ibm.com>

[ Upstream commit 5ce9ad815a296374ca21f43f3b1ab5083d202ee1 ]

ibmveth_rx_csum_helper() must be called after ibmveth_rx_mss_helper()
as ibmveth_rx_csum_helper() may alter ip and tcp checksum values.

Fixes: 66aa0678efc2 ("ibmveth: Support to enable LSO/CSO for Trunk VEA.")
Signed-off-by: David Wilder <dwilder@...ibm.com>
Reviewed-by: Thomas Falcon <tlfalcon@...ux.ibm.com>
Reviewed-by: Cristobal Forno <cris.forno@....com>
Reviewed-by: Pradeep Satyanarayana <pradeeps@...ux.vnet.ibm.com>
Acked-by: Willem de Bruijn <willemb@...gle.com>
Signed-off-by: Jakub Kicinski <kuba@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/ethernet/ibm/ibmveth.c |   10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

--- a/drivers/net/ethernet/ibm/ibmveth.c
+++ b/drivers/net/ethernet/ibm/ibmveth.c
@@ -1385,16 +1385,16 @@ static int ibmveth_poll(struct napi_stru
 			skb_put(skb, length);
 			skb->protocol = eth_type_trans(skb, netdev);
 
-			if (csum_good) {
-				skb->ip_summed = CHECKSUM_UNNECESSARY;
-				ibmveth_rx_csum_helper(skb, adapter);
-			}
-
 			if (length > netdev->mtu + ETH_HLEN) {
 				ibmveth_rx_mss_helper(skb, mss, lrg_pkt);
 				adapter->rx_large_packets++;
 			}
 
+			if (csum_good) {
+				skb->ip_summed = CHECKSUM_UNNECESSARY;
+				ibmveth_rx_csum_helper(skb, adapter);
+			}
+
 			napi_gro_receive(napi, skb);	/* send it up */
 
 			netdev->stats.rx_packets++;