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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/natsemi.c
parentf835e471b557c45d2e5701ea5215f6e739b4eb39 (diff)
downloadop-kernel-dev-689be43945e9ca7dd704522e55af1b8a73a994d3.zip
op-kernel-dev-689be43945e9ca7dd704522e55af1b8a73a994d3.tar.gz
[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/natsemi.c')
-rw-r--r--drivers/net/natsemi.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/natsemi.c b/drivers/net/natsemi.c
index babb59e..9d6d254 100644
--- a/drivers/net/natsemi.c
+++ b/drivers/net/natsemi.c
@@ -1926,7 +1926,7 @@ static void refill_rx(struct net_device *dev)
break; /* Better luck next round. */
skb->dev = dev; /* Mark as being used by this device. */
np->rx_dma[entry] = pci_map_single(np->pci_dev,
- skb->tail, buflen, PCI_DMA_FROMDEVICE);
+ skb->data, buflen, PCI_DMA_FROMDEVICE);
np->rx_ring[entry].addr = cpu_to_le32(np->rx_dma[entry]);
}
np->rx_ring[entry].cmd_status = cpu_to_le32(np->rx_buf_sz);
@@ -2280,7 +2280,7 @@ static void netdev_rx(struct net_device *dev)
buflen,
PCI_DMA_FROMDEVICE);
eth_copy_and_sum(skb,
- np->rx_skbuff[entry]->tail, pkt_len, 0);
+ np->rx_skbuff[entry]->data, pkt_len, 0);
skb_put(skb, pkt_len);
pci_dma_sync_single_for_device(np->pci_dev,
np->rx_dma[entry],
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