netdev - [PATCH 1/2] e1000: Simple optimizations in e1000_xmit

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Date:	Fri, 05 Oct 2007 14:15:16 -0700
From:	Auke Kok <auke-jan.h.kok@...el.com>
To:	jeff@...zik.org
Cc:	netdev@...r.kernel.org, krkumar2@...ibm.com
Subject: [PATCH 1/2] e1000: Simple optimizations in e1000_xmit_frame

From: Krishna Kumar <krkumar2@...ibm.com>

Some simple optimizations in e1000_xmit_frame.

Signed-off-by: Krishna Kumar <krkumar2@...ibm.com>
---

 drivers/net/e1000/e1000_main.c |    9 ++++-----
 1 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
index 10505de..0472638 100644
--- a/drivers/net/e1000/e1000_main.c
+++ b/drivers/net/e1000/e1000_main.c
@@ -3261,14 +3261,13 @@ e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
 	unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD;
 	unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
 	unsigned int tx_flags = 0;
-	unsigned int len = skb->len;
+	unsigned int len = skb->len - skb->data_len;
 	unsigned long flags;
-	unsigned int nr_frags = 0;
-	unsigned int mss = 0;
+	unsigned int nr_frags;
+	unsigned int mss;
 	int count = 0;
 	int tso;
 	unsigned int f;
-	len -= skb->data_len;
 
 	/* This goes back to the question of how to logically map a tx queue
 	 * to a flow.  Right now, performance is impacted slightly negatively
@@ -3302,7 +3301,7 @@ e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
 		* points to just header, pull a few bytes of payload from
 		* frags into skb->data */
 		hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
-		if (skb->data_len && (hdr_len == (skb->len - skb->data_len))) {
+		if (skb->data_len && hdr_len == len) {
 			switch (adapter->hw.mac_type) {
 				unsigned int pull_size;
 			case e1000_82544:
-
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