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net/mlx4_en: Don't attempt to TX offload the outer UDP checksum for VXLAN 

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: 837052d0cc ('net/mlx4_en: Add netdev support for TCP/IP
		     offloads of vxlan tunneling')
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Or Gerlitz 2014-10-30 15:59:27 +02:00 committed by David S. Miller
parent 9cc233fb0f
commit a4f2dacbf2
1 changed files with 5 additions and 2 deletions
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7
drivers/net/ethernet/mellanox/mlx4/en_tx.c
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@ -836,8 +836,11 @@ netdev_tx_t mlx4_en_xmit(struct sk_buff *skb, struct net_device *dev)
* whether LSO is used */ * whether LSO is used */
tx_desc->ctrl.srcrb_flags = priv->ctrl_flags; tx_desc->ctrl.srcrb_flags = priv->ctrl_flags;
if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) { if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
tx_desc->ctrl.srcrb_flags |= cpu_to_be32(MLX4_WQE_CTRL_IP_CSUM | if (!skb->encapsulation)
MLX4_WQE_CTRL_TCP_UDP_CSUM); 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++; ring->tx_csum++;
} }