netdev - [PATCH 10/26] atl1: use csum

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1199154173-4058-11-git-send-email-jacliburn@bellsouth.net>
Date:	Mon, 31 Dec 2007 20:22:37 -0600
From:	Jay Cliburn <jacliburn@...lsouth.net>
To:	netdev@...r.kernel.org
Cc:	Jay Cliburn <jacliburn@...lsouth.net>
Subject: [PATCH 10/26] atl1: use csum_start

Use skb->csum_start for tx checksum offload preparation.

Signed-off-by: Jay Cliburn <jacliburn@...lsouth.net>
---
 drivers/net/atlx/atl1.c |   11 ++++++-----
 1 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/net/atlx/atl1.c b/drivers/net/atlx/atl1.c
index b0c3273..31aad9f 100644
--- a/drivers/net/atlx/atl1.c
+++ b/drivers/net/atlx/atl1.c
@@ -1376,16 +1376,17 @@ 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;
-- 
1.5.3.3

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html