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/au1000_eth.c b/drivers/net/au1000_eth.c
index 7abb2c84ba5d..ece6128bef14 100644
--- a/drivers/net/au1000_eth.c
+++ b/drivers/net/au1000_eth.c
@@ -924,7 +924,6 @@ static netdev_tx_t au1000_tx(struct sk_buff *skb, struct net_device *dev)
         au_sync();
         dev_kfree_skb(skb);
         aup->tx_head = (aup->tx_head + 1) & (NUM_TX_DMA - 1);
-        dev->trans_start = jiffies;
         return NETDEV_TX_OK;
 }
 
@@ -937,7 +936,7 @@ static void au1000_tx_timeout(struct net_device *dev)
         netdev_err(dev, "au1000_tx_timeout: dev=%p\n", dev);
         au1000_reset_mac(dev);
         au1000_init(dev);
-        dev->trans_start = jiffies;
+        dev->trans_start = jiffies; /* prevent tx timeout */
         netif_wake_queue(dev);
 }