netdev - [PATCH 1/2 net-next] ixgbe: use skb

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Date:	Mon, 18 Jun 2012 10:58:16 -0700
From:	Stephen Hemminger <shemminger@...tta.com>
To:	Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
	Bruce Allan <bruce.w.allan@...el.com>,
	Carolyn Wyborny <carolyn.wyborny@...el.com>,
	Don Skidmore <donald.c.skidmore@...el.com>,
	Greg Rose <gregory.v.rose@...el.com>,
	Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@...el.com>,
	Alex Duyck <alexander.h.duyck@...el.com>,
	"David S. Miller" <davem@...emloft.net>
Cc:	e1000-devel@...ts.sourceforge.net, netdev@...r.kernel.org
Subject: [PATCH 1/2 net-next] ixgbe: use skb_padto

The code to pad packets here is the same effective code as
the existing inline function skb_padto(). There is a minor
performance gain since skb_padto() also uses unlikely().

Signed-off-by: Stephen Hemminger <shemminger@...tta.com>


--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c	2012-06-18 10:53:09.130376800 -0700
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c	2012-06-18 10:55:13.104540844 -0700
@@ -6389,11 +6389,8 @@ static netdev_tx_t ixgbe_xmit_frame(stru
 	 * The minimum packet size for olinfo paylen is 17 so pad the skb
 	 * in order to meet this minimum size requirement.
 	 */
-	if (skb->len < 17) {
-		if (skb_padto(skb, 17))
-			return NETDEV_TX_OK;
-		skb->len = 17;
-	}
+	if (skb_padto(skb, 17))
+		return NETDEV_TX_OK;
 
 	tx_ring = adapter->tx_ring[skb->queue_mapping];
 	return ixgbe_xmit_frame_ring(skb, adapter, tx_ring);
--
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