net: trans_start cleanups

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

Exceptions are NETIF_F_LLTX drivers

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

1 files changed, 1 insertions, 2 deletions

diff --git a/drivers/net/ewrk3.c b/drivers/net/ewrk3.c
index 11ba70f49971..99eb56be093f 100644
--- a/drivers/net/ewrk3.c
+++ b/drivers/net/ewrk3.c
@@ -757,7 +757,7 @@ static void ewrk3_timeout(struct net_device *dev)
                  */
                 ENABLE_IRQs;
 
-                dev->trans_start = jiffies;
+                dev->trans_start = jiffies; /* prevent tx timeout */
                 netif_wake_queue(dev);
         }
 }
@@ -862,7 +862,6 @@ static netdev_tx_t ewrk3_queue_pkt(struct sk_buff *skb, struct net_device *dev)
         spin_unlock_irq (&lp->hw_lock);
 
         dev->stats.tx_bytes += skb->len;
-        dev->trans_start = jiffies;
         dev_kfree_skb (skb);
 
         /* Check for free resources: stop Tx queue if there are none */