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net: trans_start cleanups

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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>
This commit is contained in:
Eric Dumazet
2010-05-10 05:01:31 -07:00
committed by David S. Miller
parent 2b0b05ddc0
commit 1ae5dc342a
168 changed files with 103 additions and 314 deletions
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1
drivers/net/arm/at91_ether.c
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@@ -824,7 +824,6 @@ static int at91ether_start_xmit(struct sk_buff *skb, struct net_device *dev)
/* Set length of the packet in the Transmit Control register */
at91_emac_write(AT91_EMAC_TCR, skb->len);
dev->trans_start = jiffies;
} else {
printk(KERN_ERR "at91_ether.c: at91ether_start_xmit() called, but device is busy!\n");
return NETDEV_TX_BUSY; /* if we return anything but zero, dev.c:1055 calls kfree_skb(skb)