net: dont update dev->trans_start in 10GB drivers

Followup of commits 9d21493b4beb8f918ba248032fefa393074a5e2b
and 08baf561083bc27a953aa087dd8a664bb2b88e8e
(net: tx scalability works : trans_start)
(net: txq_trans_update() helper)

Now that core network takes care of trans_start updates, dont do it
in drivers themselves, if possible. Multi queue drivers can
avoid one cache miss (on dev->trans_start) in their start_xmit()
handler.

Exceptions are NETIF_F_LLTX drivers (vxge & tehuti)

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 0 insertions, 2 deletions

diff --git a/drivers/net/enic/enic_main.c b/drivers/net/enic/enic_main.c
index 9080f07da8f..8005b602f77 100644
--- a/drivers/net/enic/enic_main.c
+++ b/drivers/net/enic/enic_main.c
@@ -661,8 +661,6 @@ static int enic_hard_start_xmit(struct sk_buff *skb, struct net_device *netdev)
         if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + 1)
                 netif_stop_queue(netdev);
 
-        netdev->trans_start = jiffies;
-
         spin_unlock_irqrestore(&enic->wq_lock[0], flags);
 
         return NETDEV_TX_OK;