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/at1700.c b/drivers/net/at1700.c
index 332f9806b78e..861f07a775fb 100644
--- a/drivers/net/at1700.c
+++ b/drivers/net/at1700.c
@@ -583,7 +583,7 @@ static void net_tx_timeout (struct net_device *dev)
         outb (0x00, ioaddr + TX_START);
         outb (0x03, ioaddr + COL16CNTL);
 
-        dev->trans_start = jiffies;
+        dev->trans_start = jiffies; /* prevent tx timeout */
 
         lp->tx_started = 0;
         lp->tx_queue_ready = 1;
@@ -636,7 +636,6 @@ static netdev_tx_t net_send_packet (struct sk_buff *skb,
                 outb (0x80 | lp->tx_queue, ioaddr + TX_START);
                 lp->tx_queue = 0;
                 lp->tx_queue_len = 0;
-                dev->trans_start = jiffies;
                 lp->tx_started = 1;
                 netif_start_queue (dev);
         } else if (lp->tx_queue_len < 4096 - 1502)