target/linux/brcm2708/patches-4.14/950-0315-usb-gadget-ethernet-Re-enable-Jumbo-frames.patch

   1 From 1810e953fd59ebb674c292a13eff8d56c88e1c7e Mon Sep 17 00:00:00 2001
   2 From: John Greb <h3x4m3r0n@gmail.com>
   3 Date: Sun, 6 May 2018 20:01:57 +0000
   4 Subject: [PATCH 315/454] usb: gadget ethernet: Re-enable Jumbo frames.
   5
   6 Commit <eea52743eb5654ec6f52b0e8b4aefec952543697> upstream
   7
   8 Fixes: <b3e3893e1253> ("net: use core MTU range checking")
   9 which patched only one of two functions used to setup the
  10 USB Gadget Ethernet driver, causing a serious performance
  11 regression in the ability to increase mtu size above 1500.
  12
  13 Signed-off-by: John Greb <h3x4m3r0n@gmail.com>
  14 Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
  15 ---
  16  drivers/usb/gadget/function/u_ether.c | 4 ++++
  17  1 file changed, 4 insertions(+)
  18
  19 --- a/drivers/usb/gadget/function/u_ether.c
  20 +++ b/drivers/usb/gadget/function/u_ether.c
  21 @@ -848,6 +848,10 @@ struct net_device *gether_setup_name_def
  22         net->ethtool_ops = &ops;
  23         SET_NETDEV_DEVTYPE(net, &gadget_type);
  24
  25 +       /* MTU range: 14 - 15412 */
  26 +       net->min_mtu = ETH_HLEN;
  27 +       net->max_mtu = GETHER_MAX_ETH_FRAME_LEN;
  28 +
  29         return net;
  30  }
  31  EXPORT_SYMBOL_GPL(gether_setup_name_default);