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/bfin_mac.c b/drivers/net/bfin_mac.c
index c488cea8f455..b0207f01eb6b 100644
--- a/drivers/net/bfin_mac.c
+++ b/drivers/net/bfin_mac.c
@@ -654,7 +654,6 @@ static int bfin_mac_hard_start_xmit(struct sk_buff *skb,
 out:
         adjust_tx_list();
         current_tx_ptr = current_tx_ptr->next;
-        dev->trans_start = jiffies;
         dev->stats.tx_packets++;
         dev->stats.tx_bytes += (skb->len);
         return NETDEV_TX_OK;
@@ -805,7 +804,7 @@ static void bfin_mac_timeout(struct net_device *dev)
         bfin_mac_enable();
 
         /* We can accept TX packets again */
-        dev->trans_start = jiffies;
+        dev->trans_start = jiffies; /* prevent tx timeout */
         netif_wake_queue(dev);
 }