diff options
author | David S. Miller <davem@davemloft.net> | 2005-06-28 22:25:31 (GMT) |
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committer | David S. Miller <davem@davemloft.net> | 2005-06-28 22:25:31 (GMT) |
commit | 689be43945e9ca7dd704522e55af1b8a73a994d3 (patch) | |
tree | 6dcc7a5675a9a2b98c36ee54f2ba4386f84efe83 /drivers/net/8139cp.c | |
parent | f835e471b557c45d2e5701ea5215f6e739b4eb39 (diff) | |
download | linux-689be43945e9ca7dd704522e55af1b8a73a994d3.tar.xz |
[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/8139cp.c')
-rw-r--r-- | drivers/net/8139cp.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/8139cp.c b/drivers/net/8139cp.c index e4b3c5c..7b293f0 100644 --- a/drivers/net/8139cp.c +++ b/drivers/net/8139cp.c @@ -596,7 +596,7 @@ rx_status_loop: mapping = cp->rx_skb[rx_tail].mapping = - pci_map_single(cp->pdev, new_skb->tail, + pci_map_single(cp->pdev, new_skb->data, buflen, PCI_DMA_FROMDEVICE); cp->rx_skb[rx_tail].skb = new_skb; @@ -1101,7 +1101,7 @@ static int cp_refill_rx (struct cp_private *cp) skb_reserve(skb, RX_OFFSET); cp->rx_skb[i].mapping = pci_map_single(cp->pdev, - skb->tail, cp->rx_buf_sz, PCI_DMA_FROMDEVICE); + skb->data, cp->rx_buf_sz, PCI_DMA_FROMDEVICE); cp->rx_skb[i].skb = skb; cp->rx_ring[i].opts2 = 0; |