ibmvnic: fix accelerated VLAN handling

[ Upstream commit e84b47941e15e6666afb8ee8b21d1c3fc1a013af ]

Don't request tag insertion when it isn't present in outgoing skb.

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
index 699ef94..7661064 100644 (file)
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -1545,7 +1545,7 @@ static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
        tx_crq.v1.sge_len = cpu_to_be32(skb->len);
        tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
 
-       if (adapter->vlan_header_insertion) {
+       if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) {
                tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
                tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
        }