From ca553980432898da5d4125573a9e2aee6ed5d355 Mon Sep 17 00:00:00 2001 From: Gurucharan Shetty Date: Tue, 15 Dec 2009 13:00:31 +0000 Subject: [PATCH] ixgbe: allow tx of pre-formatted vlan tagged packets 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 for igb (Commit - fa4a7ef36ec834fee1719636b30d2f28f4cb0166). Signed-off-by: Gurucharan Shetty Signed-off-by: Arthur Jones Acked-by: Mallikarjuna R Chilakala Signed-off-by: Jeff Kirsher Signed-off-by: David S. Miller --- drivers/net/ixgbe/ixgbe_main.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c index 52927482493..bd64387563f 100644 --- a/drivers/net/ixgbe/ixgbe_main.c +++ b/drivers/net/ixgbe/ixgbe_main.c @@ -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)