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, 4 deletions

diff --git a/drivers/net/arm/w90p910_ether.c b/drivers/net/arm/w90p910_ether.c
index 2491934b73e8..2e852463382b 100644
--- a/drivers/net/arm/w90p910_ether.c
+++ b/drivers/net/arm/w90p910_ether.c
@@ -483,7 +483,7 @@ static void w90p910_reset_mac(struct net_device *dev)
 
         w90p910_init_desc(dev);
 
-        dev->trans_start = jiffies;
+        dev->trans_start = jiffies; /* prevent tx timeout */
         ether->cur_tx = 0x0;
         ether->finish_tx = 0x0;
         ether->cur_rx = 0x0;
@@ -497,7 +497,7 @@ static void w90p910_reset_mac(struct net_device *dev)
         w90p910_trigger_tx(dev);
         w90p910_trigger_rx(dev);
 
-        dev->trans_start = jiffies;
+        dev->trans_start = jiffies; /* prevent tx timeout */
 
         if (netif_queue_stopped(dev))
                 netif_wake_queue(dev);
@@ -634,8 +634,6 @@ static int w90p910_send_frame(struct net_device *dev,
 
         txbd = &ether->tdesc->desclist[ether->cur_tx];
 
-        dev->trans_start = jiffies;
-
         if (txbd->mode & TX_OWEN_DMA)
                 netif_stop_queue(dev);