From 5ca3bc3041b1cbbb3361a99bd666e907850a1a7a Mon Sep 17 00:00:00 2001
From: Jay Cliburn <jacliburn@bellsouth.net>
Date: Sat, 2 Feb 2008 19:50:08 -0600
Subject: [PATCH] atl1: use csum_start
Use skb->csum_start for tx checksum offload preparation. Also swap
the variables css and cso so they hold the intended values of csum
start and offset, respectively.
Signed-off-by: Jay Cliburn <jacliburn@bellsouth.net>
Acked-by: Chris Snook <csnook@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---
drivers/net/atlx/atl1.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/drivers/net/atlx/atl1.c b/drivers/net/atlx/atl1.c
index f4add3cafe24..99298222c8f6 100644
--- a/drivers/net/atlx/atl1.c
+++ b/drivers/net/atlx/atl1.c
@@ -1347,16 +1347,17 @@ static int atl1_tx_csum(struct atl1_adapter *adapter, struct sk_buff *skb,
u8 css, cso;
if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
- cso = skb_transport_offset(skb);
- css = cso + skb->csum_offset;
- if (unlikely(cso & 0x1)) {
+ css = (u8) (skb->csum_start - skb_headroom(skb));
+ cso = css + (u8) skb->csum_offset;
+ if (unlikely(css & 0x1)) {
+ /* L1 hardware requires an even number here */
dev_printk(KERN_DEBUG, &adapter->pdev->dev,
"payload offset not an even number\n");
return -1;
}
- ptpd->word3 |= (cso & TPD_PLOADOFFSET_MASK) <<
+ ptpd->word3 |= (css & TPD_PLOADOFFSET_MASK) <<
TPD_PLOADOFFSET_SHIFT;
- ptpd->word3 |= (css & TPD_CCSUMOFFSET_MASK) <<
+ ptpd->word3 |= (cso & TPD_CCSUMOFFSET_MASK) <<
TPD_CCSUMOFFSET_SHIFT;
ptpd->word3 |= 1 << TPD_CUST_CSUM_EN_SHIFT;
return true;
--
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