path: root/drivers/net/ethernet/intel/igb
diff options
authorAlexander Duyck <alexander.h.duyck@intel.com>2016-11-28 10:42:23 -0500
committerDavid S. Miller <davem@davemloft.net>2016-12-01 15:41:35 -0500
commit516165a1e2f22e512a976f8dafd76a22310ccfd9 (patch)
tree42eaa01494355fa7f66bb3ac59d57cda6153e9da /drivers/net/ethernet/intel/igb
parentnet: asix: Fix AX88772_suspend() USB vendor commands failure issues (diff)
igb/igbvf: Don't use lco_csum to compute IPv4 checksum
In the case of IPIP and SIT tunnel frames the outer transport header offset is actually set to the same offset as the inner transport header. This results in the lco_csum call not doing any checksum computation over the inner IPv4/v6 header data. In order to account for that I am updating the code so that we determine the location to start the checksum ourselves based on the location of the IPv4 header and the length. Fixes: e10715d3e961 ("igb/igbvf: Add support for GSO partial") Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/intel/igb')
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index edc9a6ac5169..9affd7c198bd 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -4931,11 +4931,15 @@ static int igb_tso(struct igb_ring *tx_ring,
/* initialize outer IP header fields */
if (ip.v4->version == 4) {
+ unsigned char *csum_start = skb_checksum_start(skb);
+ unsigned char *trans_start = ip.hdr + (ip.v4->ihl * 4);
/* IP header will have to cancel out any data that
* is not a part of the outer IP header
- ip.v4->check = csum_fold(csum_add(lco_csum(skb),
- csum_unfold(l4.tcp->check)));
+ ip.v4->check = csum_fold(csum_partial(trans_start,
+ csum_start - trans_start,
+ 0));
type_tucmd |= E1000_ADVTXD_TUCMD_IPV4;
ip.v4->tot_len = 0;