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Message-Id: <20141112010956.063479743@linuxfoundation.org>
Date: Wed, 12 Nov 2014 10:12:38 +0900
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Or Gerlitz <ogerlitz@...lanox.com>,
"David S. Miller" <davem@...emloft.net>
Subject: [PATCH 3.17 020/319] net/mlx4_en: Dont attempt to TX offload the outer UDP checksum for VXLAN
3.17-stable review patch. If anyone has any objections, please let me know.
------------------
From: Or Gerlitz <ogerlitz@...lanox.com>
[ Upstream commit a4f2dacbf2a5045e34b98a35d9a3857800f25a7b ]
For VXLAN/NVGRE encapsulation, the current HW doesn't support offloading
both the outer UDP TX checksum and the inner TCP/UDP TX checksum.
The driver doesn't advertize SKB_GSO_UDP_TUNNEL_CSUM, however we are wrongly
telling the HW to offload the outer UDP checksum for encapsulated packets,
fix that.
Fixes: 837052d0ccc5 ('net/mlx4_en: Add netdev support for TCP/IP
offloads of vxlan tunneling')
Signed-off-by: Or Gerlitz <ogerlitz@...lanox.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/net/ethernet/mellanox/mlx4/en_tx.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
--- a/drivers/net/ethernet/mellanox/mlx4/en_tx.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_tx.c
@@ -808,8 +808,11 @@ netdev_tx_t mlx4_en_xmit(struct sk_buff
tx_desc->ctrl.fence_size = (real_size / 16) & 0x3f;
tx_desc->ctrl.srcrb_flags = priv->ctrl_flags;
if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
- tx_desc->ctrl.srcrb_flags |= cpu_to_be32(MLX4_WQE_CTRL_IP_CSUM |
- MLX4_WQE_CTRL_TCP_UDP_CSUM);
+ if (!skb->encapsulation)
+ tx_desc->ctrl.srcrb_flags |= cpu_to_be32(MLX4_WQE_CTRL_IP_CSUM |
+ MLX4_WQE_CTRL_TCP_UDP_CSUM);
+ else
+ tx_desc->ctrl.srcrb_flags |= cpu_to_be32(MLX4_WQE_CTRL_IP_CSUM);
ring->tx_csum++;
}
--
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