diff options
Diffstat (limited to 'net/dsa/tag_trailer.c')
| -rw-r--r-- | net/dsa/tag_trailer.c | 36 |
1 files changed, 4 insertions, 32 deletions
diff --git a/net/dsa/tag_trailer.c b/net/dsa/tag_trailer.c index 4f8ab62f0208..5749ba85c2b8 100644 --- a/net/dsa/tag_trailer.c +++ b/net/dsa/tag_trailer.c @@ -13,46 +13,18 @@ static struct sk_buff *trailer_xmit(struct sk_buff *skb, struct net_device *dev) { struct dsa_port *dp = dsa_slave_to_port(dev); - struct sk_buff *nskb; - int padlen; u8 *trailer; - /* - * We have to make sure that the trailer ends up as the very - * last 4 bytes of the packet. This means that we have to pad - * the packet to the minimum ethernet frame size, if necessary, - * before adding the trailer. - */ - padlen = 0; - if (skb->len < 60) - padlen = 60 - skb->len; - - nskb = alloc_skb(NET_IP_ALIGN + skb->len + padlen + 4, GFP_ATOMIC); - if (!nskb) - return NULL; - skb_reserve(nskb, NET_IP_ALIGN); - - skb_reset_mac_header(nskb); - skb_set_network_header(nskb, skb_network_header(skb) - skb->head); - skb_set_transport_header(nskb, skb_transport_header(skb) - skb->head); - skb_copy_and_csum_dev(skb, skb_put(nskb, skb->len)); - consume_skb(skb); - - if (padlen) { - skb_put_zero(nskb, padlen); - } - - trailer = skb_put(nskb, 4); + trailer = skb_put(skb, 4); trailer[0] = 0x80; trailer[1] = 1 << dp->index; trailer[2] = 0x10; trailer[3] = 0x00; - return nskb; + return skb; } -static struct sk_buff *trailer_rcv(struct sk_buff *skb, struct net_device *dev, - struct packet_type *pt) +static struct sk_buff *trailer_rcv(struct sk_buff *skb, struct net_device *dev) { u8 *trailer; int source_port; @@ -82,7 +54,7 @@ static const struct dsa_device_ops trailer_netdev_ops = { .proto = DSA_TAG_PROTO_TRAILER, .xmit = trailer_xmit, .rcv = trailer_rcv, - .overhead = 4, + .needed_tailroom = 4, }; MODULE_LICENSE("GPL"); |