be2net: Fix CSO for UDP packets

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>

diff --git a/drivers/net/benet/be_main.c b/drivers/net/benet/be_main.c
index 8767355..6b80a06 100644 (file)
--- a/drivers/net/benet/be_main.c
+++ b/drivers/net/benet/be_main.c
@@ -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);