net offloading: Do not mask out NETIF_F_HW_VLAN_TX for vlan.

In netif_skb_features() we return only the features that are valid for vlans
if we have a vlan packet.  However, we should not mask out NETIF_F_HW_VLAN_TX
since it enables transmission of vlan tags and is obviously valid.

Reported-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/core/dev.c b/net/core/dev.c
index 83507c2..4c58d11 100644 (file)
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2023,13 +2023,13 @@ int netif_skb_features(struct sk_buff *skb)
                return harmonize_features(skb, protocol, features);
        }
 
-       features &= skb->dev->vlan_features;
+       features &= (skb->dev->vlan_features | NETIF_F_HW_VLAN_TX);
 
        if (protocol != htons(ETH_P_8021Q)) {
                return harmonize_features(skb, protocol, features);
        } else {
                features &= NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST |
-                               NETIF_F_GEN_CSUM;
+                               NETIF_F_GEN_CSUM | NETIF_F_HW_VLAN_TX;
                return harmonize_features(skb, protocol, features);
        }
 }