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>
diff --git a/drivers/net/ll_temac_main.c b/drivers/net/ll_temac_main.c
index 78c9a2e..b59b24d 100644
--- a/drivers/net/ll_temac_main.c
+++ b/drivers/net/ll_temac_main.c
@@ -527,7 +527,7 @@
 		dev_err(&ndev->dev, "Error setting TEMAC options\n");
 
 	/* Init Driver variable */
-	ndev->trans_start = 0;
+	ndev->trans_start = jiffies; /* prevent tx timeout */
 }
 
 void temac_adjust_link(struct net_device *ndev)