e1000e_4.10_max-mtu.patch

   1 diff --git a/src/netdev.c b/src/netdev.c
   2 index 73b0f9a..aef1bc2 100644
   3 --- a/src/netdev.c
   4 +++ b/src/netdev.c
   5 @@ -6724,19 +6724,12 @@ static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
   6         int max_frame = new_mtu + VLAN_ETH_HLEN + ETH_FCS_LEN;
   7
   8         /* Jumbo frame support */
   9 -       if ((max_frame > (VLAN_ETH_FRAME_LEN + ETH_FCS_LEN)) &&
  10 +       if ((new_mtu > ETH_DATA_LEN) &&
  11             !(adapter->flags & FLAG_HAS_JUMBO_FRAMES)) {
  12                 e_err("Jumbo Frames not supported.\n");
  13                 return -EINVAL;
  14         }
  15
  16 -       /* Supported frame sizes */
  17 -       if ((new_mtu < (VLAN_ETH_ZLEN + ETH_FCS_LEN)) ||
  18 -           (max_frame > adapter->max_hw_frame_size)) {
  19 -               e_err("Unsupported MTU setting\n");
  20 -               return -EINVAL;
  21 -       }
  22 -
  23         /* Jumbo frame workaround on 82579 and newer requires CRC be stripped */
  24         if ((adapter->hw.mac.type >= e1000_pch2lan) &&
  25             !(adapter->flags2 & FLAG2_CRC_STRIPPING) &&
  26 @@ -8262,6 +8255,11 @@ static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
  27  #endif /* HAVE_NETDEV_VLAN_FEATURES */
  28         }
  29
  30 +       /* MTU range: 68 - max_hw_frame_size */
  31 +       netdev->min_mtu = ETH_MIN_MTU;
  32 +       netdev->max_mtu = adapter->max_hw_frame_size -
  33 +                         (VLAN_ETH_HLEN + ETH_FCS_LEN);
  34 +
  35         if (e1000e_enable_mng_pass_thru(&adapter->hw))
  36                 adapter->flags |= FLAG_MNG_PT_ENABLED;
  37