igb: Support sending custom Ethernet FCS.
Including bad FCS, used generate frames with bad FCS
to test other system's handling of RX of bad packets.
Signed-off-by: Ben Greear <greearb@candelatech.com>
Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index e96cef8..99364ed 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -1964,6 +1964,8 @@
NETIF_F_IPV6_CSUM |
NETIF_F_SG;
+ netdev->priv_flags |= IFF_SUPP_NOFCS;
+
if (pci_using_dac) {
netdev->features |= NETIF_F_HIGHDMA;
netdev->vlan_features |= NETIF_F_HIGHDMA;
@@ -4293,6 +4295,8 @@
/* write last descriptor with RS and EOP bits */
cmd_type |= cpu_to_le32(size) | cpu_to_le32(IGB_TXD_DCMD);
+ if (unlikely(skb->no_fcs))
+ cmd_type &= ~(cpu_to_le32(E1000_ADVTXD_DCMD_IFCS));
tx_desc->read.cmd_type_len = cmd_type;
/* set the timestamp */