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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@20506 3c298f89-4303-0410-b956-a3cf2f4a3e73
master
Gabor Juhos 2010-03-27 13:05:27 +00:00
parent 9fb9eaa98e
commit 55a949e0f7
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; 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) static int ag71xx_rx_packets(struct ag71xx *ag, int limit)
{ {
struct net_device *dev = ag->dev; 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)) if (ag71xx_has_ar8216(ag))
err = ag71xx_remove_ar8216_header(ag, skb); err = ag71xx_remove_ar8216_header(ag, skb);
else
err = ag71xx_rx_copy_skb(ag, &skb, pktlen);
if (err) { if (err) {
dev->stats.rx_dropped++; dev->stats.rx_dropped++;