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/starfire.c b/drivers/net/starfire.c
index 8a6d27cdc0bd..e19b5a143886 100644
--- a/drivers/net/starfire.c
+++ b/drivers/net/starfire.c
@@ -1173,7 +1173,7 @@ static void tx_timeout(struct net_device *dev)
 
         /* Trigger an immediate transmit demand. */
 
-        dev->trans_start = jiffies;
+        dev->trans_start = jiffies; /* prevent tx timeout */
         np->stats.tx_errors++;
         netif_wake_queue(dev);
 }
@@ -1312,8 +1312,6 @@ static netdev_tx_t start_tx(struct sk_buff *skb, struct net_device *dev)
         if ((np->cur_tx - np->dirty_tx) + 4 > TX_RING_SIZE)
                 netif_stop_queue(dev);
 
-        dev->trans_start = jiffies;
-
         return NETDEV_TX_OK;
 }