ixgbe: Mask off check of frag_off as we only want fragment offset
We were incorrectly checking the entire frag_off field when we only wanted the
fragment offset. As a result we were not pulling in TCP headers when the DNF
flag was set.
To correct that we will now check for frag off using the IP_OFFSET mask.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index 1339932..d473a7c 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -1337,7 +1337,7 @@
return hdr.network - data;
/* record next protocol if header is present */
- if (!hdr.ipv4->frag_off)
+ if (!(hdr.ipv4->frag_off & htons(IP_OFFSET)))
nexthdr = hdr.ipv4->protocol;
} else if (protocol == __constant_htons(ETH_P_IPV6)) {
if ((hdr.network - data) > (max_len - sizeof(struct ipv6hdr)))