package/kernel/mac80211/patches/660-0054-rtl8xxxu-Handle-devices-with-a-smaller-LLT-buffer.patch

   1 From 5dd3f1799baf4683c0161f7e49d65bee17f3e35d Mon Sep 17 00:00:00 2001
   2 From: Jes Sorensen <Jes.Sorensen@redhat.com>
   3 Date: Wed, 31 Aug 2016 16:31:38 -0400
   4 Subject: [PATCH] rtl8xxxu: Handle devices with a smaller LLT buffer
   5
   6 The 8188e (except for I cut parts) seem to have a smaller LLT buffer
   7 than all other known devices.
   8
   9 Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
  10 ---
  11  drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h       |  1 +
  12  drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_8188e.c |  1 +
  13  drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c  | 11 ++++++++---
  14  3 files changed, 10 insertions(+), 3 deletions(-)
  15
  16 --- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h
  17 +++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h
  18 @@ -1411,6 +1411,7 @@ struct rtl8xxxu_fileops {
  19         u8 page_num_hi;
  20         u8 page_num_lo;
  21         u8 page_num_norm;
  22 +       u8 last_llt_entry;
  23  };
  24
  25  extern int rtl8xxxu_debug;
  26 --- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_8188e.c
  27 +++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_8188e.c
  28 @@ -1454,4 +1454,5 @@ struct rtl8xxxu_fileops rtl8188eu_fops =
  29         .page_num_hi = TX_PAGE_NUM_HI_PQ_8188E,
  30         .page_num_lo = TX_PAGE_NUM_LO_PQ_8188E,
  31         .page_num_norm = TX_PAGE_NUM_NORM_PQ_8188E,
  32 +       .last_llt_entry = 176,
  33  };
  34 --- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
  35 +++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
  36 @@ -2485,11 +2485,16 @@ static int rtl8xxxu_llt_write(struct rtl
  37  int rtl8xxxu_init_llt_table(struct rtl8xxxu_priv *priv)
  38  {
  39         int ret;
  40 -       int i;
  41 +       int i, last_entry;
  42         u8 last_tx_page;
  43
  44         last_tx_page = priv->fops->total_page_num;
  45
  46 +       if (priv->fops->last_llt_entry)
  47 +               last_entry = priv->fops->last_llt_entry;
  48 +       else
  49 +               last_entry = 255;
  50 +
  51         for (i = 0; i < last_tx_page; i++) {
  52                 ret = rtl8xxxu_llt_write(priv, i, i + 1);
  53                 if (ret)
  54 @@ -2501,14 +2506,14 @@ int rtl8xxxu_init_llt_table(struct rtl8x
  55                 goto exit;
  56
  57         /* Mark remaining pages as a ring buffer */
  58 -       for (i = last_tx_page + 1; i < 0xff; i++) {
  59 +       for (i = last_tx_page + 1; i < last_entry; i++) {
  60                 ret = rtl8xxxu_llt_write(priv, i, (i + 1));
  61                 if (ret)
  62                         goto exit;
  63         }
  64
  65         /*  Let last entry point to the start entry of ring buffer */
  66 -       ret = rtl8xxxu_llt_write(priv, 0xff, last_tx_page + 1);
  67 +       ret = rtl8xxxu_llt_write(priv, last_entry, last_tx_page + 1);
  68         if (ret)
  69                 goto exit;
  70