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authorYi Zou <yi.zou@intel.com>2010-09-22 21:57:58 +0400
committerDavid S. Miller <davem@davemloft.net>2010-09-23 08:20:04 +0400
commit7b872a55c40b7e6f5e257c252f96dde911bd7b2f (patch)
tree8541d31e7ba17083e488104fd4f6fc72d6c71581 /drivers/net/ixgb/ixgb_main.c
parent308fb39a860c816be8741fe783ae7c64e9c1af5d (diff)
downloadlinux-7b872a55c40b7e6f5e257c252f96dde911bd7b2f.tar.xz
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 <yi.zou@intel.com> Tested-by: Emil Tantilov <emil.s.tantilov@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ixgb/ixgb_main.c')
-rw-r--r--drivers/net/ixgb/ixgb_main.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/net/ixgb/ixgb_main.c b/drivers/net/ixgb/ixgb_main.c
index c2f6e71e1181..80e62578ffa0 100644
--- a/drivers/net/ixgb/ixgb_main.c
+++ b/drivers/net/ixgb/ixgb_main.c
@@ -446,8 +446,10 @@ ixgb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
NETIF_F_HW_VLAN_FILTER;
netdev->features |= NETIF_F_TSO;
- if (pci_using_dac)
+ if (pci_using_dac) {
netdev->features |= NETIF_F_HIGHDMA;
+ netdev->vlan_features |= NETIF_F_HIGHDMA;
+ }
/* make sure the EEPROM is good */