target/linux/bcm27xx/patches-5.4/950-0003-smsx95xx-fix-crimes-against-truesize.patch

   1 From bb137167247980c89005d607e5e89417f8f59634 Mon Sep 17 00:00:00 2001
   2 From: Steve Glendinning <steve.glendinning@smsc.com>
   3 Date: Thu, 19 Feb 2015 18:47:12 +0000
   4 Subject: [PATCH] smsx95xx: fix crimes against truesize
   5
   6 smsc95xx is adjusting truesize when it shouldn't, and following a recent patch from Eric this is now triggering warnings.
   7
   8 This patch stops smsc95xx from changing truesize.
   9
  10 Signed-off-by: Steve Glendinning <steve.glendinning@smsc.com>
  11 ---
  12  drivers/net/usb/smsc95xx.c | 10 ++++++++--
  13  1 file changed, 8 insertions(+), 2 deletions(-)
  14
  15 --- a/drivers/net/usb/smsc95xx.c
  16 +++ b/drivers/net/usb/smsc95xx.c
  17 @@ -70,6 +70,10 @@ static bool turbo_mode = true;
  18  module_param(turbo_mode, bool, 0644);
  19  MODULE_PARM_DESC(turbo_mode, "Enable multiple frames per Rx transaction");
  20
  21 +static bool truesize_mode = false;
  22 +module_param(truesize_mode, bool, 0644);
  23 +MODULE_PARM_DESC(truesize_mode, "Report larger truesize value");
  24 +
  25  static int __must_check __smsc95xx_read_reg(struct usbnet *dev, u32 index,
  26                                             u32 *data, int in_pm)
  27  {
  28 @@ -1957,7 +1961,8 @@ static int smsc95xx_rx_fixup(struct usbn
  29                                 if (dev->net->features & NETIF_F_RXCSUM)
  30                                         smsc95xx_rx_csum_offload(skb);
  31                                 skb_trim(skb, skb->len - 4); /* remove fcs */
  32 -                               skb->truesize = size + sizeof(struct sk_buff);
  33 +                               if (truesize_mode)
  34 +                                       skb->truesize = size + sizeof(struct sk_buff);
  35
  36                                 return 1;
  37                         }
  38 @@ -1975,7 +1980,8 @@ static int smsc95xx_rx_fixup(struct usbn
  39                         if (dev->net->features & NETIF_F_RXCSUM)
  40                                 smsc95xx_rx_csum_offload(ax_skb);
  41                         skb_trim(ax_skb, ax_skb->len - 4); /* remove fcs */
  42 -                       ax_skb->truesize = size + sizeof(struct sk_buff);
  43 +                       if (truesize_mode)
  44 +                               ax_skb->truesize = size + sizeof(struct sk_buff);
  45
  46                         usbnet_skb_return(dev, ax_skb);
  47                 }