target/linux/realtek/patches-5.4/701-net-dsa-add-rtl838x-support-for-tag-trailer.patch

   1 --- a/net/dsa/tag_trailer.c
   2 +++ b/net/dsa/tag_trailer.c
   3 @@ -44,7 +44,12 @@ static struct sk_buff *trailer_xmit(stru
   4
   5         trailer = skb_put(nskb, 4);
   6         trailer[0] = 0x80;
   7 +
   8 +#ifdef CONFIG_NET_DSA_RTL83XX
   9 +       trailer[1] = dp->index;
  10 +#else
  11         trailer[1] = 1 << dp->index;
  12 +#endif /* CONFIG_NET_DSA_RTL83XX */
  13         trailer[2] = 0x10;
  14         trailer[3] = 0x00;
  15
  16 @@ -61,12 +66,20 @@ static struct sk_buff *trailer_rcv(struc
  17                 return NULL;
  18
  19         trailer = skb_tail_pointer(skb) - 4;
  20 +
  21 +#ifdef CONFIG_NET_DSA_RTL83XX
  22 +       if (trailer[0] != 0x80 || (trailer[1] & 0xe0) != 0x00 ||
  23 +           (trailer[2] & 0xef) != 0x00 || trailer[3] != 0x00)
  24 +               return NULL;
  25 +
  26 +       source_port = trailer[1] & 0x1f;
  27 +#else
  28         if (trailer[0] != 0x80 || (trailer[1] & 0xf8) != 0x00 ||
  29             (trailer[2] & 0xef) != 0x00 || trailer[3] != 0x00)
  30                 return NULL;
  31
  32         source_port = trailer[1] & 7;
  33 -
  34 +#endif
  35         skb->dev = dsa_master_find_slave(dev, 0, source_port);
  36         if (!skb->dev)
  37                 return NULL;