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ar71xx: ag71xx: copy received packet to avoid unaligned access in the IP stack

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SVN-Revision: 20506
This commit is contained in:
Gabor Juhos 2010-03-27 13:05:27 +00:00
parent f9acf8ada1
commit b7ca043240
1 changed files with 19 additions and 0 deletions
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19
target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c
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@ -759,6 +759,23 @@ static int ag71xx_tx_packets(struct ag71xx *ag)
return sent;
}
static int ag71xx_rx_copy_skb(struct ag71xx *ag, struct sk_buff **pskb,
int pktlen)
{
struct sk_buff *copy_skb;
copy_skb = netdev_alloc_skb(ag->dev, pktlen + NET_IP_ALIGN);
if (!copy_skb)
return -ENOMEM;
skb_reserve(copy_skb, NET_IP_ALIGN);
skb_copy_from_linear_data(*pskb, copy_skb->data, pktlen);
dev_kfree_skb_any(*pskb);
*pskb = copy_skb;
return 0;
}
static int ag71xx_rx_packets(struct ag71xx *ag, int limit)
{
struct net_device *dev = ag->dev;
@ -798,6 +815,8 @@ static int ag71xx_rx_packets(struct ag71xx *ag, int limit)
if (ag71xx_has_ar8216(ag))
err = ag71xx_remove_ar8216_header(ag, skb);
else
err = ag71xx_rx_copy_skb(ag, &skb, pktlen);
if (err) {
dev->stats.rx_dropped++;