diff mbox

[3.19.y-ckt,stable] Patch "net/mlx4_en: Fix wrong csum complete report when rxvlan offload is disabled" has been added to staging queue

Message ID 1436827828-21413-1-git-send-email-kamal@canonical.com
State New
Headers show

Commit Message

Kamal Mostafa July 13, 2015, 10:50 p.m. UTC 
This is a note to let you know that I have just added a patch titled

    net/mlx4_en: Fix wrong csum complete report when rxvlan offload is disabled

to the linux-3.19.y-queue branch of the 3.19.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.19.y-queue

This patch is scheduled to be released in version 3.19.8-ckt4.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.19.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

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From 18d057261e3d096b2b127fc6e110ccfa441a9acc Mon Sep 17 00:00:00 2001
From: Ido Shamay <idos@mellanox.com>
Date: Thu, 25 Jun 2015 11:29:43 +0300
Subject: net/mlx4_en: Fix wrong csum complete report when rxvlan offload is
 disabled

[ Upstream commit 79a258526ce1051cb9684018c25a89d51ac21be8 ]

The check_csum() function relied on hwtstamp_rx_filter to know if rxvlan
offload is disabled. This is wrong since rxvlan offload can be switched
on/off regardless of hwtstamp_rx_filter.

Also moved check_csum to query CQE information to identify VLAN packets
and removed the check of IP packets, since it has been validated before.

Fixes: f8c6455bb04b ('net/mlx4_en: Extend checksum offloading by CHECKSUM COMPLETE')
Signed-off-by: Ido Shamay <idos@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 drivers/net/ethernet/mellanox/mlx4/en_rx.c | 17 ++++++-----------
 1 file changed, 6 insertions(+), 11 deletions(-)

--
1.9.1
diff mbox

Patch

diff --git a/drivers/net/ethernet/mellanox/mlx4/en_rx.c b/drivers/net/ethernet/mellanox/mlx4/en_rx.c
index 10d3533..7f16627 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_rx.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_rx.c
@@ -719,7 +719,7 @@  static int get_fixed_ipv6_csum(__wsum hw_checksum, struct sk_buff *skb,
 }
 #endif
 static int check_csum(struct mlx4_cqe *cqe, struct sk_buff *skb, void *va,
-		      int hwtstamp_rx_filter)
+		      netdev_features_t dev_features)
 {
 	__wsum hw_checksum = 0;

@@ -727,14 +727,8 @@  static int check_csum(struct mlx4_cqe *cqe, struct sk_buff *skb, void *va,

 	hw_checksum = csum_unfold((__force __sum16)cqe->checksum);

-	if (((struct ethhdr *)va)->h_proto == htons(ETH_P_8021Q) &&
-	    hwtstamp_rx_filter != HWTSTAMP_FILTER_NONE) {
-		/* next protocol non IPv4 or IPv6 */
-		if (((struct vlan_hdr *)hdr)->h_vlan_encapsulated_proto
-		    != htons(ETH_P_IP) &&
-		    ((struct vlan_hdr *)hdr)->h_vlan_encapsulated_proto
-		    != htons(ETH_P_IPV6))
-			return -1;
+	if (cqe->vlan_my_qpn & cpu_to_be32(MLX4_CQE_VLAN_PRESENT_MASK) &&
+	    !(dev_features & NETIF_F_HW_VLAN_CTAG_RX)) {
 		hw_checksum = get_fixed_vlan_csum(hw_checksum, hdr);
 		hdr += sizeof(struct vlan_hdr);
 	}
@@ -897,7 +891,8 @@  int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud

 			if (ip_summed == CHECKSUM_COMPLETE) {
 				void *va = skb_frag_address(skb_shinfo(gro_skb)->frags);
-				if (check_csum(cqe, gro_skb, va, ring->hwtstamp_rx_filter)) {
+				if (check_csum(cqe, gro_skb, va,
+					       dev->features)) {
 					ip_summed = CHECKSUM_NONE;
 					ring->csum_none++;
 					ring->csum_complete--;
@@ -952,7 +947,7 @@  int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud
 		}

 		if (ip_summed == CHECKSUM_COMPLETE) {
-			if (check_csum(cqe, skb, skb->data, ring->hwtstamp_rx_filter)) {
+			if (check_csum(cqe, skb, skb->data, dev->features)) {
 				ip_summed = CHECKSUM_NONE;
 				ring->csum_complete--;
 				ring->csum_none++;