From 15dd16c233b6d5ceea3a00f18d7c42902d0ac6b6 Mon Sep 17 00:00:00 2001 From: Li RongQing Date: Mon, 3 Jun 2013 22:11:16 +0000 Subject: cxgb3: Correct comparisons and calculations using skb->tail and skb-transport_header This corrects an regression introduced by "net: Use 16bits for *_headers fields of struct skbuff" when NET_SKBUFF_DATA_USES_OFFSET is not set. In that case skb->tail will be a pointer whereas skb->transport_header will be an offset from head. This is corrected by using wrappers that ensure that comparisons and calculations are always made using pointers. Cc: Simon Horman Signed-off-by: Li RongQing Reviewed-by: Simon Horman Signed-off-by: David S. Miller --- drivers/net/ethernet/chelsio/cxgb3/sge.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/net/ethernet/chelsio/cxgb3') diff --git a/drivers/net/ethernet/chelsio/cxgb3/sge.c b/drivers/net/ethernet/chelsio/cxgb3/sge.c index 46d1efc17527..687ec4a8bb48 100644 --- a/drivers/net/ethernet/chelsio/cxgb3/sge.c +++ b/drivers/net/ethernet/chelsio/cxgb3/sge.c @@ -1583,7 +1583,7 @@ static void deferred_unmap_destructor(struct sk_buff *skb) dui = (struct deferred_unmap_info *)skb->head; p = dui->addr; - if (skb->tail - skb->transport_header) + if (skb_tail_pointer(skb) - skb_transport_header(skb)) pci_unmap_single(dui->pdev, *p++, skb_tail_pointer(skb) - skb_transport_header(skb), PCI_DMA_TODEVICE); -- cgit v1.2.3