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, 3 insertions, 5 deletions

diff --git a/drivers/net/sun3lance.c b/drivers/net/sun3lance.c
index 1694ca5bfb4..358c22f9acb 100644
--- a/drivers/net/sun3lance.c
+++ b/drivers/net/sun3lance.c
@@ -523,8 +523,8 @@ static int lance_start_xmit( struct sk_buff *skb, struct net_device *dev )
 
         /* Transmitter timeout, serious problems. */
         if (netif_queue_stopped(dev)) {
-                int tickssofar = jiffies - dev->trans_start;
-                if (tickssofar < 20)
+                int tickssofar = jiffies - dev_trans_start(dev);
+                if (tickssofar < HZ/5)
                         return NETDEV_TX_BUSY;
 
                 DPRINTK( 1, ( "%s: transmit timed out, status %04x, resetting.\n",
@@ -559,7 +559,6 @@ static int lance_start_xmit( struct sk_buff *skb, struct net_device *dev )
                 REGA( CSR0 ) = CSR0_INEA | CSR0_INIT | CSR0_STRT;
 
                 netif_start_queue(dev);
-                dev->trans_start = jiffies;
 
                 return NETDEV_TX_OK;
         }
@@ -637,8 +636,7 @@ static int lance_start_xmit( struct sk_buff *skb, struct net_device *dev )
         AREG = CSR0;
         DPRINTK( 2, ( "%s: lance_start_xmit() exiting, csr0 %4.4x.\n",
                                   dev->name, DREG ));
-        dev->trans_start = jiffies;
-        dev_kfree_skb( skb );
+        dev_kfree_skb(skb);
 
         lp->lock = 0;
         if ((MEM->tx_head[(entry+1) & TX_RING_MOD_MASK].flag & TMD1_OWN) ==