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, 3 deletions

diff --git a/drivers/net/natsemi.c b/drivers/net/natsemi.c
index 9250bf6573ec..2a17b503feaa 100644
--- a/drivers/net/natsemi.c
+++ b/drivers/net/natsemi.c
@@ -1905,7 +1905,7 @@ static void ns_tx_timeout(struct net_device *dev)
         spin_unlock_irq(&np->lock);
         enable_irq(dev->irq);
 
-        dev->trans_start = jiffies;
+        dev->trans_start = jiffies; /* prevent tx timeout */
         np->stats.tx_errors++;
         netif_wake_queue(dev);
 }
@@ -2119,8 +2119,6 @@ static netdev_tx_t start_tx(struct sk_buff *skb, struct net_device *dev)
         }
         spin_unlock_irqrestore(&np->lock, flags);
 
-        dev->trans_start = jiffies;
-
         if (netif_msg_tx_queued(np)) {
                 printk(KERN_DEBUG "%s: Transmit frame #%d queued in slot %d.\n",
                         dev->name, np->cur_tx, entry);