igb: Correctly get protocol information

We can't look at the socket to get protocol information. We should
instead look directly at the packet, and hope there are no IPv6
option headers.

Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index 6a1f23092099b5d3f0d974b7ea370a9a73c63b31..928ce8287e6932027fdffdc316962a64f6be73e1 100644 (file)
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -31,7 +31,6 @@
 #include <linux/vmalloc.h>
 #include <linux/pagemap.h>
 #include <linux/netdevice.h>
-#include <linux/tcp.h>
 #include <linux/ipv6.h>
 #include <net/checksum.h>
 #include <net/ip6_checksum.h>
@@ -2484,10 +2483,24 @@ static inline bool igb_tx_csum_adv(struct igb_adapter *adapter,
                tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT);
 
                if (skb->ip_summed == CHECKSUM_PARTIAL) {
-                       if (skb->protocol == htons(ETH_P_IP))
+                       switch (skb->protocol) {
+                       case __constant_htons(ETH_P_IP):
                                tu_cmd |= E1000_ADVTXD_TUCMD_IPV4;
-                       if (skb->sk && (skb->sk->sk_protocol == IPPROTO_TCP))
-                               tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
+                               if (ip_hdr(skb)->protocol == IPPROTO_TCP)
+                                       tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
+                               break;
+                       case __constant_htons(ETH_P_IPV6):
+                               /* XXX what about other V6 headers?? */
+                               if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
+                                       tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
+                               break;
+                       default:
+                               if (unlikely(net_ratelimit()))
+                                       dev_warn(&adapter->pdev->dev,
+                                           "partial checksum but proto=%x!\n",
+                                           skb->protocol);
+                               break;
+                       }
                }
 
                context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd);