qla3xxx: cleanup checksum offload code

The code for checksum is more complex than needed when dealing with VLAN's;
the higher layers already pass down the location of the IP header.

Compile tested only, no hardware available.

Signed-off-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: Ron Mercer <ron.mercer@qlogic.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

diff --git a/drivers/net/qla3xxx.c b/drivers/net/qla3xxx.c
index 585be04..8be8be4 100755 (executable)
--- a/drivers/net/qla3xxx.c
+++ b/drivers/net/qla3xxx.c
@@ -2433,37 +2433,22 @@ static int ql_get_seg_count(struct ql3_adapter *qdev,
        return -1;
 }
 
-static void ql_hw_csum_setup(struct sk_buff *skb,
+static void ql_hw_csum_setup(const struct sk_buff *skb,
                             struct ob_mac_iocb_req *mac_iocb_ptr)
 {
-       struct ethhdr *eth;
-       struct iphdr *ip = NULL;
-       u8 offset = ETH_HLEN;
+       const struct iphdr *ip = ip_hdr(skb);
 
-       eth = (struct ethhdr *)(skb->data);
+       mac_iocb_ptr->ip_hdr_off = skb_network_offset(skb);
+       mac_iocb_ptr->ip_hdr_len = ip->ihl;
 
-       if (eth->h_proto == __constant_htons(ETH_P_IP)) {
-               ip = (struct iphdr *)&skb->data[ETH_HLEN];
-       } else if (eth->h_proto == htons(ETH_P_8021Q) &&
-                  ((struct vlan_ethhdr *)skb->data)->
-                  h_vlan_encapsulated_proto == __constant_htons(ETH_P_IP)) {
-               ip = (struct iphdr *)&skb->data[VLAN_ETH_HLEN];
-               offset = VLAN_ETH_HLEN;
-       }
-
-       if (ip) {
-               if (ip->protocol == IPPROTO_TCP) {
-                       mac_iocb_ptr->flags1 |= OB_3032MAC_IOCB_REQ_TC | 
+       if (ip->protocol == IPPROTO_TCP) {
+               mac_iocb_ptr->flags1 |= OB_3032MAC_IOCB_REQ_TC |
                        OB_3032MAC_IOCB_REQ_IC;
-                       mac_iocb_ptr->ip_hdr_off = offset;
-                       mac_iocb_ptr->ip_hdr_len = ip->ihl;
-               } else if (ip->protocol == IPPROTO_UDP) {
-                       mac_iocb_ptr->flags1 |= OB_3032MAC_IOCB_REQ_UC | 
+       } else {
+               mac_iocb_ptr->flags1 |= OB_3032MAC_IOCB_REQ_UC |
                        OB_3032MAC_IOCB_REQ_IC;
-                       mac_iocb_ptr->ip_hdr_off = offset;
-                       mac_iocb_ptr->ip_hdr_len = ip->ihl;
-               }
        }
+
 }
 
 /*