netdev - [PATCH net-next v2 1/4] ibmvnic: Account for VLAN tag in L2 Header descriptor

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Date:   Mon, 12 Mar 2018 11:51:02 -0500
From:   Thomas Falcon <tlfalcon@...ux.vnet.ibm.com>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, jallen@...ux.vnet.ibm.com,
        nfont@...ux.vnet.ibm.com,
        Thomas Falcon <tlfalcon@...ux.vnet.ibm.com>
Subject: [PATCH net-next v2 1/4] ibmvnic: Account for VLAN tag in L2 Header descriptor

If a VLAN tag is present in the Ethernet header, account
for that when providing the L2 header to firmware.

Signed-off-by: Thomas Falcon <tlfalcon@...ux.vnet.ibm.com>
---
 drivers/net/ethernet/ibm/ibmvnic.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
index 7be4b06..ea9f351 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -1221,7 +1221,10 @@ static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
 	int len = 0;
 	u8 *hdr;
 
-	hdr_len[0] = sizeof(struct ethhdr);
+	if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb))
+		hdr_len[0] = sizeof(struct vlan_ethhdr);
+	else
+		hdr_len[0] = sizeof(struct ethhdr);
 
 	if (skb->protocol == htons(ETH_P_IP)) {
 		hdr_len[1] = ip_hdr(skb)->ihl * 4;
-- 
2.7.5