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/xilinx_emaclite.c b/drivers/net/xilinx_emaclite.c
index 93828d565390..a7db68d37ee9 100644
--- a/drivers/net/xilinx_emaclite.c
+++ b/drivers/net/xilinx_emaclite.c
@@ -558,7 +558,7 @@ static void xemaclite_tx_timeout(struct net_device *dev)
         }
 
         /* To exclude tx timeout */
-        dev->trans_start = 0xffffffff - TX_TIMEOUT - TX_TIMEOUT;
+        dev->trans_start = jiffies; /* prevent tx timeout */
 
         /* We're all ready to go. Start the queue */
         netif_wake_queue(dev);
@@ -590,7 +590,7 @@ static void xemaclite_tx_handler(struct net_device *dev)
                         dev->stats.tx_bytes += lp->deferred_skb->len;
                         dev_kfree_skb_irq(lp->deferred_skb);
                         lp->deferred_skb = NULL;
-                        dev->trans_start = jiffies;
+                        dev->trans_start = jiffies; /* prevent tx timeout */
                         netif_wake_queue(dev);
                 }
         }
@@ -1054,7 +1054,6 @@ static int xemaclite_send(struct sk_buff *orig_skb, struct net_device *dev)
 
         dev->stats.tx_bytes += len;
         dev_kfree_skb(new_skb);
-        dev->trans_start = jiffies;
 
         return 0;
 }