From 5ca3bc3041b1cbbb3361a99bd666e907850a1a7a Mon Sep 17 00:00:00 2001 From: Jay Cliburn 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 Acked-by: Chris Snook Signed-off-by: Jeff Garzik --- 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 f4add3cafe2..99298222c8f 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; -- 2.20.1