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be2net: Fix CSO for UDP packets

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We're setting skb->ip_summed to CHECKSUM_NONE for all non-TCP pkts, making the stack
recompute checksum.This is a bug for UDP pkts for which cso must be used.

Signed-off-by: Somnath Kotur <somnath.kotur@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Somnath Kotur 2010-10-25 01:11:58 +00:00 committed by David S. Miller
parent 63a76944b6
commit c6ce2f4b27
1 changed files with 8 additions and 12 deletions
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20
drivers/net/benet/be_main.c
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@ -849,20 +849,16 @@ static void be_rx_stats_update(struct be_rx_obj *rxo,
stats->rx_mcast_pkts++;
}
static inline bool do_pkt_csum(struct be_eth_rx_compl *rxcp, bool cso)
static inline bool csum_passed(struct be_eth_rx_compl *rxcp)
{
u8 l4_cksm, ip_version, ipcksm, tcpf = 0, udpf = 0, ipv6_chk;
u8 l4_cksm, ipv6, ipcksm;
l4_cksm = AMAP_GET_BITS(struct amap_eth_rx_compl, l4_cksm, rxcp);
ipcksm = AMAP_GET_BITS(struct amap_eth_rx_compl, ipcksm, rxcp);
ip_version = AMAP_GET_BITS(struct amap_eth_rx_compl, ip_version, rxcp);
if (ip_version) {
tcpf = AMAP_GET_BITS(struct amap_eth_rx_compl, tcpf, rxcp);
udpf = AMAP_GET_BITS(struct amap_eth_rx_compl, udpf, rxcp);
}
ipv6_chk = (ip_version && (tcpf || udpf));
ipv6 = AMAP_GET_BITS(struct amap_eth_rx_compl, ip_version, rxcp);
return ((l4_cksm && ipv6_chk && ipcksm) && cso) ? false : true;
/* Ignore ipcksm for ipv6 pkts */
return l4_cksm && (ipcksm || ipv6);
}
static struct be_rx_page_info *
@ -1017,10 +1013,10 @@ static void be_rx_compl_process(struct be_adapter *adapter,
skb_fill_rx_data(adapter, rxo, skb, rxcp, num_rcvd);
if (do_pkt_csum(rxcp, adapter->rx_csum))
skb_checksum_none_assert(skb);
else
if (likely(adapter->rx_csum && csum_passed(rxcp)))
skb->ip_summed = CHECKSUM_UNNECESSARY;
else
skb_checksum_none_assert(skb);
skb->truesize = skb->len + sizeof(struct sk_buff);
skb->protocol = eth_type_trans(skb, adapter->netdev);