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ixgbe: allow tx of pre-formatted vlan tagged packets

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When the 82598 is fed 802.1q packets, it chokes with
an error of the form:

ixgbe: eth0: ixgbe_tx_csum: partial checksum but proto=81!

As the logic there was not smart enough to look into
the vlan header to pick out the encapsulated protocol.

There are times when we'd like to send these packets
out without having to configure a vlan on the interface.
Here we check for the vlan tag and allow the packet to
go out with the correct hardware checksum.

This patch is a clone of a previously submitted patch by
Arthur Jones <ajones@riverbed.com> for igb (Commit -
fa4a7ef36e).

Signed-off-by: Gurucharan Shetty <gshetty@riverbed.com>
Signed-off-by: Arthur Jones <ajones@riverbed.com>
Acked-by: Mallikarjuna R Chilakala <mallikarjuna.chilakala@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Gurucharan Shetty 2009-12-15 13:00:31 +00:00 committed by David S. Miller
parent 734e979f25
commit ca55398043
1 changed files with 12 additions and 1 deletions
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13
drivers/net/ixgbe/ixgbe_main.c
View file

@ -5006,7 +5006,18 @@ static bool ixgbe_tx_csum(struct ixgbe_adapter *adapter,
IXGBE_ADVTXD_DTYP_CTXT);
if (skb->ip_summed == CHECKSUM_PARTIAL) {
switch (skb->protocol) {
__be16 protocol;
if (skb->protocol == cpu_to_be16(ETH_P_8021Q)) {
const struct vlan_ethhdr *vhdr =
(const struct vlan_ethhdr *)skb->data;
protocol = vhdr->h_vlan_encapsulated_proto;
} else {
protocol = skb->protocol;
}
switch (protocol) {
case cpu_to_be16(ETH_P_IP):
type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
if (ip_hdr(skb)->protocol == IPPROTO_TCP)