target/linux/brcm2708/patches-4.4/0165-smsx95xx-Add-option-to-disable-the-crimes-against-tr.patch

   1 From 18674a7da1c3d50d9c957a8f88aaea2aa653d223 Mon Sep 17 00:00:00 2001
   2 From: popcornmix <popcornmix@gmail.com>
   3 Date: Wed, 20 Jan 2016 17:50:09 +0000
   4 Subject: [PATCH 165/170] smsx95xx: Add option to disable the crimes against
   5  truesize fix
   6
   7 It may improve iperf numbers on Pi 1, but may generate dmesg warnings and possibly cause network issues
   8 See issue 1248.
   9 ---
  10  drivers/net/usb/smsc95xx.c | 8 ++++++++
  11  1 file changed, 8 insertions(+)
  12  mode change 100755 => 100644 drivers/net/usb/smsc95xx.c
  13
  14 --- a/drivers/net/usb/smsc95xx.c
  15 +++ b/drivers/net/usb/smsc95xx.c
  16 @@ -75,6 +75,10 @@ static bool turbo_mode = false;
  17  module_param(turbo_mode, bool, 0644);
  18  MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
  19
  20 +static bool truesize_mode = false;
  21 +module_param(truesize_mode, bool, 0644);
  22 +MODULE_PARM_DESC(truesize_mode, "Report larger truesize value");
  23 +
  24  static char *macaddr = ":";
  25  module_param(macaddr, charp, 0);
  26  MODULE_PARM_DESC(macaddr, "MAC address");
  27 @@ -1841,6 +1845,8 @@ static int smsc95xx_rx_fixup(struct usbn
  28                                 if (dev->net->features & NETIF_F_RXCSUM)
  29                                         smsc95xx_rx_csum_offload(skb);
  30                                 skb_trim(skb, skb->len - 4); /* remove fcs */
  31 +                               if (truesize_mode)
  32 +                                       skb->truesize = size + sizeof(struct sk_buff);
  33
  34                                 return 1;
  35                         }
  36 @@ -1858,6 +1864,8 @@ static int smsc95xx_rx_fixup(struct usbn
  37                         if (dev->net->features & NETIF_F_RXCSUM)
  38                                 smsc95xx_rx_csum_offload(ax_skb);
  39                         skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
  40 +                       if (truesize_mode)
  41 +                               ax_skb->truesize = size + sizeof(struct sk_buff);
  42
  43                         usbnet_skb_return(dev, ax_skb);
  44                 }