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/wan/pc300_drv.c b/drivers/net/wan/pc300_drv.c
index 17502d80b65a..c6aa66e5b52f 100644
--- a/drivers/net/wan/pc300_drv.c
+++ b/drivers/net/wan/pc300_drv.c
@@ -1790,7 +1790,7 @@ static void cpc_tx_timeout(struct net_device *dev)
                            cpc_readb(card->hw.falcbase + card->hw.cpld_reg2) &
                            ~(CPLD_REG2_FALC_LED1 << (2 * ch)));
         }
-        dev->trans_start = jiffies;
+        dev->trans_start = jiffies; /* prevent tx timeout */
         CPC_UNLOCK(card, flags);
         netif_wake_queue(dev);
 }
@@ -1849,7 +1849,6 @@ static int cpc_queue_xmit(struct sk_buff *skb, struct net_device *dev)
         if (d->trace_on) {
                 cpc_trace(dev, skb, 'T');
         }
-        dev->trans_start = jiffies;
 
         /* Start transmission */
         CPC_LOCK(card, flags);