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authorVlad Yasevich <vyasevic@redhat.com>2014-03-26 11:47:56 -0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-04-14 06:42:18 -0700
commit48f77355b32ab30456a0d6fda1ee2d367b9a3d25 (patch)
treefe029e2fb04ebb2643b3f85ff2fe78ffaa4f2fb1
parent2d4cf3d6f36d88d30ce2186179fe2aa7e5c06c2e (diff)
downloadlinaro-lsk-48f77355b32ab30456a0d6fda1ee2d367b9a3d25.tar.gz
vlan: Set hard_header_len according to available acceleration
[ Upstream commit fc0d48b8fb449ca007b2057328abf736cb516168 ] Currently, if the card supports CTAG acceleration we do not account for the vlan header even if we are configuring an 8021AD vlan. This may not be best since we'll do software tagging for 8021AD which will cause data copy on skb head expansion Configure the length based on available hw offload capabilities and vlan protocol. CC: Patrick McHardy <kaber@trash.net> Signed-off-by: Vlad Yasevich <vyasevic@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--net/8021q/vlan.c4
-rw-r--r--net/8021q/vlan_dev.c3
2 files changed, 5 insertions, 2 deletions
diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c
index 9424f3718ea..86abb2e59ae 100644
--- a/net/8021q/vlan.c
+++ b/net/8021q/vlan.c
@@ -305,9 +305,11 @@ static void vlan_sync_address(struct net_device *dev,
static void vlan_transfer_features(struct net_device *dev,
struct net_device *vlandev)
{
+ struct vlan_dev_priv *vlan = vlan_dev_priv(vlandev);
+
vlandev->gso_max_size = dev->gso_max_size;
- if (dev->features & NETIF_F_HW_VLAN_CTAG_TX)
+ if (vlan_hw_offload_capable(dev->features, vlan->vlan_proto))
vlandev->hard_header_len = dev->hard_header_len;
else
vlandev->hard_header_len = dev->hard_header_len + VLAN_HLEN;
diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index 48db8587ccc..cf35f383db4 100644
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -611,7 +611,8 @@ static int vlan_dev_init(struct net_device *dev)
#endif
dev->needed_headroom = real_dev->needed_headroom;
- if (real_dev->features & NETIF_F_HW_VLAN_CTAG_TX) {
+ if (vlan_hw_offload_capable(real_dev->features,
+ vlan_dev_priv(dev)->vlan_proto)) {
dev->header_ops = &vlan_passthru_header_ops;
dev->hard_header_len = real_dev->hard_header_len;
} else {