patches/intel/igb/igb_4.10_max-mtu.patch

   1 diff --git a/src/e1000_defines.h b/src/e1000_defines.h
   2 index 6de3988..d58e12f 100644
   3 --- a/src/e1000_defines.h
   4 +++ b/src/e1000_defines.h
   5 @@ -423,7 +423,8 @@
   6  #define ETHERNET_IEEE_VLAN_TYPE                0x8100  /* 802.3ac packet */
   7
   8  #define ETHERNET_FCS_SIZE              4
   9 -#define MAX_JUMBO_FRAME_SIZE           0x3F00
  10 +#define MAX_JUMBO_FRAME_SIZE           0x2600
  11 +#define MAX_STD_JUMBO_FRAME_SIZE       9216
  12  /* The datasheet maximum supported RX size is 9.5KB (9728 bytes) */
  13  #define MAX_RX_JUMBO_FRAME_SIZE                0x2600
  14  #define E1000_TX_PTR_GAP               0x1F
  15 diff --git a/src/igb_main.c b/src/igb_main.c
  16 index 2dff0f4..bbfe87e 100644
  17 --- a/src/igb_main.c
  18 +++ b/src/igb_main.c
  19 @@ -2852,6 +2852,10 @@ static int igb_probe(struct pci_dev *pdev,
  20         if (pci_using_dac)
  21                 netdev->features |= NETIF_F_HIGHDMA;
  22
  23 +       /* MTU range: 68 - 9216 */
  24 +       netdev->min_mtu = ETH_MIN_MTU;
  25 +       netdev->max_mtu = MAX_STD_JUMBO_FRAME_SIZE;
  26 +
  27         adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw);
  28  #ifdef DEBUG
  29         if (adapter->dmac != IGB_DMAC_DISABLE)
  30 @@ -5832,17 +5836,6 @@ static int igb_change_mtu(struct net_device *netdev, int new_mtu)
  31         struct pci_dev *pdev = adapter->pdev;
  32         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
  33
  34 -       if ((new_mtu < 68) || (max_frame > MAX_JUMBO_FRAME_SIZE)) {
  35 -               dev_err(pci_dev_to_dev(pdev), "Invalid MTU setting\n");
  36 -               return -EINVAL;
  37 -       }
  38 -
  39 -#define MAX_STD_JUMBO_FRAME_SIZE 9238
  40 -       if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
  41 -               dev_err(pci_dev_to_dev(pdev), "MTU > 9216 not supported.\n");
  42 -               return -EINVAL;
  43 -       }
  44 -
  45         /* adjust max frame to be at least the size of a standard frame */
  46         if (max_frame < (ETH_FRAME_LEN + ETH_FCS_LEN))
  47                 max_frame = ETH_FRAME_LEN + ETH_FCS_LEN;