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/82596.c b/drivers/net/82596.c
index 97c5fc019cd4..dd8dc15556cb 100644
--- a/drivers/net/82596.c
+++ b/drivers/net/82596.c
@@ -1050,7 +1050,7 @@ static void i596_tx_timeout (struct net_device *dev)
                 lp->last_restart = dev->stats.tx_packets;
         }
 
-        dev->trans_start = jiffies;
+        dev->trans_start = jiffies; /* prevent tx timeout */
         netif_wake_queue (dev);
 }
 
@@ -1060,7 +1060,6 @@ static netdev_tx_t i596_start_xmit(struct sk_buff *skb, struct net_device *dev)
         struct tx_cmd *tx_cmd;
         struct i596_tbd *tbd;
         short length = skb->len;
-        dev->trans_start = jiffies;
 
         DEB(DEB_STARTTX,printk(KERN_DEBUG "%s: i596_start_xmit(%x,%p) called\n",
                                 dev->name, skb->len, skb->data));