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, 2 insertions, 3 deletions

diff --git a/drivers/net/appletalk/cops.c b/drivers/net/appletalk/cops.c
index 6f8d6206b5c4..14e1d952226e 100644
--- a/drivers/net/appletalk/cops.c
+++ b/drivers/net/appletalk/cops.c
@@ -866,7 +866,7 @@ static void cops_timeout(struct net_device *dev)
         }
         printk(KERN_WARNING "%s: Transmit timed out.\n", dev->name);
         cops_jumpstart(dev);    /* Restart the card. */
-        dev->trans_start = jiffies;
+        dev->trans_start = jiffies; /* prevent tx timeout */
         netif_wake_queue(dev);
 }
 
@@ -919,9 +919,8 @@ static netdev_tx_t cops_send_packet(struct sk_buff *skb,
         /* Done sending packet, update counters and cleanup. */
         dev->stats.tx_packets++;
         dev->stats.tx_bytes += skb->len;
-        dev->trans_start = jiffies;
         dev_kfree_skb (skb);
-        return NETDEV_TX_OK;
+        return NETDEV_TX_OK;
 }
 
 /*