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net/mlx4_en: Explicitly set no vlan tags in WQE ctrl segment when no vlan is present 

We do not set the ins_vlan field to zero when no vlan id is present in the packet.

Since WQEs in the TX ring are not zeroed out between uses, this oversight
could result in having vlan flags present in the WQE ctrl segment when no
vlan is preset.

Fixes: e38af4faf0 ('net/mlx4_en: Add support for hardware accelerated 802.1ad vlan')
Reported-by: Gideon Naim <gideonn@mellanox.com>
Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jack Morgenstein 2015-10-27 17:36:19 +02:00 committed by David S. Miller
parent e407f39afd
commit 092bf0fc80
1 changed files with 2 additions and 0 deletions
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2
drivers/net/ethernet/mellanox/mlx4/en_tx.c
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@ -964,6 +964,8 @@ netdev_tx_t mlx4_en_xmit(struct sk_buff *skb, struct net_device *dev)
tx_desc->ctrl.ins_vlan = MLX4_WQE_CTRL_INS_SVLAN;
else if (vlan_proto == ETH_P_8021Q)
tx_desc->ctrl.ins_vlan = MLX4_WQE_CTRL_INS_CVLAN;
else
tx_desc->ctrl.ins_vlan = 0;
tx_desc->ctrl.fence_size = real_size;