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ar71xx: fix up alignment handling

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- on ar724x, rx buffers can be aligned with an offset of 2, which keeps the ip header aligned
- alignment offset is only added if the ar8216 workaround is not active and the phy driver does not advertise its own packet alignment
- ar71xx and ar91xx can not handle rx alignment offsets, however taking a hit on unaligned exceptions seems to have less overhead than re-aligning the data for large packets
- use memmove to re-align small packets, if necessary

tested on ar9132, ar7240 and ar7242 based devices without ar8216 headers

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@20892 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd
2010-04-15 23:31:17 +00:00
parent 7d1583626f
commit ea9bbe955d
2 changed files with 41 additions and 26 deletions
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target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_ar8216.c
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@@ -39,7 +39,6 @@ int ag71xx_remove_ar8216_header(struct ag71xx *ag, struct sk_buff *skb,
return -EINVAL;
}
skb_put(skb, pktlen);
skb_pull(skb, AR8216_HEADER_LEN);
return 0;
}