From 7b872a55c40b7e6f5e257c252f96dde911bd7b2f Mon Sep 17 00:00:00 2001 From: Yi Zou Date: Wed, 22 Sep 2010 17:57:58 +0000 Subject: e1000/e1000e/igb/ixgb/ixgbe: set NETIF_F_HIGHDMA for VLAN feature flags If the netdev->features is set with NETIF_F_HIGHDMA, we should set the corresponding netdev->vlan_features as well to allow VLAN netdev created on top of the real netdev to be able to also benefit from HIGHDMA on 32bit system, reducing the performance hit that is caused by __skb_linearize(), particularly for large send. This is fixed in this patch for all Intel e1000, e1000e, igb, ixgbe, and ixgbe drivers since this should be beneficial to all devices supported by these drivers. Signed-off-by: Yi Zou Tested-by: Emil Tantilov Signed-off-by: Jeff Kirsher Signed-off-by: David S. Miller --- drivers/net/igb/igb_main.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'drivers/net/igb') diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c index 61892b80d7a..f915e9cb302 100644 --- a/drivers/net/igb/igb_main.c +++ b/drivers/net/igb/igb_main.c @@ -1858,8 +1858,10 @@ static int __devinit igb_probe(struct pci_dev *pdev, netdev->vlan_features |= NETIF_F_IPV6_CSUM; netdev->vlan_features |= NETIF_F_SG; - if (pci_using_dac) + if (pci_using_dac) { netdev->features |= NETIF_F_HIGHDMA; + netdev->vlan_features |= NETIF_F_HIGHDMA; + } if (hw->mac.type >= e1000_82576) netdev->features |= NETIF_F_SCTP_CSUM; -- cgit v1.2.2