ixgbe_4.10_max-mtu.patch

   1 diff --git a/src/ixgbe_main.c b/src/ixgbe_main.c
   2 index 83c6250..fe226cd 100644
   3 --- a/src/ixgbe_main.c
   4 +++ b/src/ixgbe_main.c
   5 @@ -6379,11 +6379,6 @@ static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
   6  static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
   7  {
   8         struct ixgbe_adapter *adapter = netdev_priv(netdev);
   9 -       int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
  10 -
  11 -       /* MTU < 68 is an error and causes problems on some kernels */
  12 -       if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
  13 -               return -EINVAL;
  14
  15         /*
  16          * For 82599EB we cannot allow legacy VFs to enable their receive
  17 @@ -6392,7 +6387,7 @@ static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
  18          */
  19         if ((adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) &&
  20             (adapter->hw.mac.type == ixgbe_mac_82599EB) &&
  21 -           (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)))
  22 +           (new_mtu > ETH_DATA_LEN))
  23                 e_warn(probe, "Setting MTU > 1500 will disable legacy VFs\n");
  24
  25         e_info(probe, "changing MTU from %d to %d\n", netdev->mtu, new_mtu);
  26 @@ -10134,6 +10129,11 @@ static int __devinit ixgbe_probe(struct pci_dev *pdev,
  27  #ifdef IFF_SUPP_NOFCS
  28         netdev->priv_flags |= IFF_SUPP_NOFCS;
  29  #endif
  30 +
  31 +       /* MTU range: 68 - 9710 */
  32 +       netdev->min_mtu = ETH_MIN_MTU;
  33 +       netdev->max_mtu = IXGBE_MAX_JUMBO_FRAME_SIZE - (ETH_HLEN + ETH_FCS_LEN);
  34 +
  35  #if IS_ENABLED(CONFIG_DCB)
  36         if (adapter->flags & IXGBE_FLAG_DCB_CAPABLE)
  37                 netdev->dcbnl_ops = &dcbnl_ops;