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virtio-net: enable TSO/checksum offloads for Q-in-Q vlans

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[ Upstream commit 2836b4f224d4fd7d1a2b23c3eecaf0f0ae199a74 ]

Since virtio does not provide it's own ndo_features_check handler,
TSO, and now checksum offload, are disabled for stacked vlans.
Re-enable the support and let the host take care of it.  This
restores/improves Guest-to-Guest performance over Q-in-Q vlans.

Acked-by: Jason Wang <jasowang@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Vladislav Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Vlad Yasevich 2017-05-23 13:38:43 -04:00 committed by Greg Kroah-Hartman
parent 9c6cfd5811
commit 9e05658477
1 changed files with 1 additions and 0 deletions
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drivers/net/virtio_net.c
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@ -1456,6 +1456,7 @@ static const struct net_device_ops virtnet_netdev = {
#ifdef CONFIG_NET_RX_BUSY_POLL
.ndo_busy_poll = virtnet_busy_poll,
#endif
.ndo_features_check = passthru_features_check,
};
static void virtnet_config_changed_work(struct work_struct *work)