releases/2.6.27.14/rtl8187-fix-error-in-setting-ofdm-power-settings-for-rtl8187l.patch

   1 From eb83bbf57429ab80f49b413e3e44d3b19c3fdc5a Mon Sep 17 00:00:00 2001
   2 From: Larry Finger <Larry.Finger@lwfinger.net>
   3 Date: Tue, 27 Jan 2009 12:31:23 -0600
   4 Subject: rtl8187: Fix error in setting OFDM power settings for RTL8187L
   5 MIME-Version: 1.0
   6 Content-Type: text/plain; charset=utf-8
   7 Content-Transfer-Encoding: 8bit
   8
   9 From: Larry Finger <Larry.Finger@lwfinger.net>
  10
  11 commit eb83bbf57429ab80f49b413e3e44d3b19c3fdc5a upstream.
  12
  13 After reports of poor performance, a review of the latest vendor driver
  14 (rtl8187_linux_26.1025.0328.2007) for RTL8187L devices was undertaken.
  15
  16 A difference was found in the code used to index the OFDM power tables. When
  17 the Linux driver was changed, my unit works at a much greater range than
  18 before. I think this fixes Bugzilla #12380 and has been tested by at least
  19 two other users.
  20
  21 Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
  22 Tested-by: Martín Ernesto Barreyro <barreyromartin@gmail.com>
  23 Signed-off-by: John W. Linville <linville@tuxdriver.com>
  24 Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
  25
  26 ---
  27  drivers/net/wireless/rtl8187_rtl8225.c |   10 ++++++++--
  28  1 file changed, 8 insertions(+), 2 deletions(-)
  29
  30 --- a/drivers/net/wireless/rtl8187_rtl8225.c
  31 +++ b/drivers/net/wireless/rtl8187_rtl8225.c
  32 @@ -287,7 +287,10 @@ static void rtl8225_rf_set_tx_power(stru
  33         ofdm_power = priv->channels[channel - 1].hw_value >> 4;
  34
  35         cck_power = min(cck_power, (u8)11);
  36 -       ofdm_power = min(ofdm_power, (u8)35);
  37 +       if (ofdm_power > (u8)15)
  38 +               ofdm_power = 25;
  39 +       else
  40 +               ofdm_power += 10;
  41
  42         rtl818x_iowrite8(priv, &priv->map->TX_GAIN_CCK,
  43                          rtl8225_tx_gain_cck_ofdm[cck_power / 6] >> 1);
  44 @@ -540,7 +543,10 @@ static void rtl8225z2_rf_set_tx_power(st
  45         cck_power += priv->txpwr_base & 0xF;
  46         cck_power = min(cck_power, (u8)35);
  47
  48 -       ofdm_power = min(ofdm_power, (u8)15);
  49 +       if (ofdm_power > (u8)15)
  50 +               ofdm_power = 25;
  51 +       else
  52 +               ofdm_power += 10;
  53         ofdm_power += priv->txpwr_base >> 4;
  54         ofdm_power = min(ofdm_power, (u8)35);
  55