From 8d463504c191c2126d097ac94fb258aabe6d3e62 Mon Sep 17 00:00:00 2001 From: Toshiaki Makita Date: Fri, 27 Mar 2015 14:31:10 +0900 Subject: [PATCH] vlan: Add features for stacked vlan device Stacked vlan devices curretly have few features (GRO, HIGHDMA, LLTX). Since we have software fallbacks in case the NIC can not handle some features for multiple vlans, we can add the same features as the lower vlan devices for stacked vlan devices. This allows stacked vlan devices to create large (GSO) packets and not to segment packets. Those packets will be segmented by software on the real device, or even can be segmented by the NIC once TSO for multiple vlans becomes enabled by the following patches. The exception is those related to FCoE, which does not have a software fallback. Signed-off-by: Toshiaki Makita Signed-off-by: David S. Miller --- net/8021q/vlan_dev.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c index f196552ec3c4..8b5ab9033b41 100644 --- a/net/8021q/vlan_dev.c +++ b/net/8021q/vlan_dev.c @@ -554,6 +554,7 @@ static int vlan_dev_init(struct net_device *dev) if (dev->features & NETIF_F_VLAN_FEATURES) netdev_warn(real_dev, "VLAN features are set incorrectly. Q-in-Q configurations may not work correctly.\n"); + dev->vlan_features = real_dev->vlan_features & ~NETIF_F_ALL_FCOE; /* ipv6 shared card related stuff */ dev->dev_id = real_dev->dev_id; -- 2.20.1