From: Jason Wang Date: Wed, 10 Apr 2013 23:32:21 +0000 (+0000) Subject: virtio-net: initialize vlan_features X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=4fda830263c52a58bcbaedeb091cbcd421cf4858;p=openwrt%2Fstaging%2Fblogic.git virtio-net: initialize vlan_features There's nothing that prevent passing the device features of virtio_net to its vlan device. So this patch simply passes those to vlan device to benefit from advanced features. Netperf shows better sending performance for vlan device since TSO can work on vlan now. before: netperf -H 192.168.5.2 MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.5.2 () port 0 AF_INET : demo Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 87380 16384 16384 10.00 4162.35 after: netperf -H 192.168.5.2 MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.5.2 () port 0 AF_INET : demo Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 87380 16384 16384 10.00 9365.42 Cc: Rusty Russell Cc: "Michael S. Tsirkin" Signed-off-by: Jason Wang Acked-by: Michael S. Tsirkin Signed-off-by: David S. Miller --- diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index f7d67e8eb1aa..8fdfde6832ab 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -1511,6 +1511,8 @@ static int virtnet_probe(struct virtio_device *vdev) /* (!csum && gso) case will be fixed by register_netdev() */ } + dev->vlan_features = dev->features; + /* Configuration may specify what MAC to use. Otherwise random. */ if (virtio_config_val_len(vdev, VIRTIO_NET_F_MAC, offsetof(struct virtio_net_config, mac),