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authorDavid S. Miller <davem@davemloft.net>2005-06-28 15:25:31 -0700
committerDavid S. Miller <davem@davemloft.net>2005-06-28 15:25:31 -0700
commit689be43945e9ca7dd704522e55af1b8a73a994d3 (patch)
tree6dcc7a5675a9a2b98c36ee54f2ba4386f84efe83 /drivers/net/r8169.c
parentf835e471b557c45d2e5701ea5215f6e739b4eb39 (diff)
[NET]: Remove gratuitous use of skb->tail in network drivers.
Many drivers use skb->tail unnecessarily. In these situations, the code roughly looks like: dev = dev_alloc_skb(...); [optional] skb_reserve(skb, ...); ... skb->tail ... But even if the skb_reserve() happens, skb->data equals skb->tail. So it doesn't make any sense to use anything other than skb->data in these cases. Another case was the s2io.c driver directly mucking with the skb->data and skb->tail pointers. It really just wanted to do an skb_reserve(), so that's what the code was changed to do instead. Another reason I'm making this change as it allows some SKB cleanups I have planned simpler to merge. In those cleanups, skb->head, skb->tail, and skb->end pointers are removed, and replaced with skb->head_room and skb->tail_room integers. Signed-off-by: David S. Miller <davem@davemloft.net> Acked-by: Jeff Garzik <jgarzik@pobox.com>
Diffstat (limited to 'drivers/net/r8169.c')
-rw-r--r--drivers/net/r8169.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/r8169.c b/drivers/net/r8169.c
index ce449fe90e6..d5afe05cd82 100644
--- a/drivers/net/r8169.c
+++ b/drivers/net/r8169.c
@@ -1876,7 +1876,7 @@ static int rtl8169_alloc_rx_skb(struct pci_dev *pdev, struct sk_buff **sk_buff,
skb_reserve(skb, NET_IP_ALIGN);
*sk_buff = skb;
- mapping = pci_map_single(pdev, skb->tail, rx_buf_sz,
+ mapping = pci_map_single(pdev, skb->data, rx_buf_sz,
PCI_DMA_FROMDEVICE);
rtl8169_map_to_asic(desc, mapping, rx_buf_sz);
@@ -2336,7 +2336,7 @@ static inline int rtl8169_try_rx_copy(struct sk_buff **sk_buff, int pkt_size,
skb = dev_alloc_skb(pkt_size + NET_IP_ALIGN);
if (skb) {
skb_reserve(skb, NET_IP_ALIGN);
- eth_copy_and_sum(skb, sk_buff[0]->tail, pkt_size, 0);
+ eth_copy_and_sum(skb, sk_buff[0]->data, pkt_size, 0);
*sk_buff = skb;
rtl8169_mark_to_asic(desc, rx_buf_sz);
ret = 0;