releases/3.4.39/b43-n-phy-increase-initial-value-of-mind-in-rssi-calibration.patch

   1 From e67dd874e60529dbd2e8232babb1e23479ba2ffa Mon Sep 17 00:00:00 2001
   2 From: Rafał Miłecki <zajec5@gmail.com>
   3 Date: Tue, 19 Mar 2013 07:52:48 +0100
   4 Subject: b43: N-PHY: increase initial value of "mind" in RSSI calibration
   5
   6 From: Rafał Miłecki <zajec5@gmail.com>
   7
   8 commit e67dd874e60529dbd2e8232babb1e23479ba2ffa upstream.
   9
  10 We're using "mind" variable to find the VCM that got the best polling
  11 results. For each VCM we calculte "currd" which is compared to the
  12 "mind". For PHY rev3+ "currd" gets values around 14k-40k. Looking for a
  13 value smaller than 40 makes no sense, so increase the initial value.
  14
  15 This fixes a regression introduced in 3.4 by commit:
  16 e0c9a0219a8f542e3946fe972a68aacf8c3f906c
  17 (my BCM4322 performance dropped from 18,4Mb/s to 9,26Mb/s)
  18
  19 Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
  20 Signed-off-by: John W. Linville <linville@tuxdriver.com>
  21 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  22
  23 ---
  24  drivers/net/wireless/b43/phy_n.c |    4 ++--
  25  1 file changed, 2 insertions(+), 2 deletions(-)
  26
  27 --- a/drivers/net/wireless/b43/phy_n.c
  28 +++ b/drivers/net/wireless/b43/phy_n.c
  29 @@ -1371,7 +1371,7 @@ static void b43_nphy_rev3_rssi_cal(struc
  30                 }
  31                 for (i = 0; i < 4; i++) {
  32                         s32 curr;
  33 -                       s32 mind = 40;
  34 +                       s32 mind = 0x100000;
  35                         s32 minpoll = 249;
  36                         u8 minvcm = 0;
  37                         if (2 * core != i)
  38 @@ -1554,7 +1554,7 @@ static void b43_nphy_rev2_rssi_cal(struc
  39         }
  40
  41         for (i = 0; i < 4; i++) {
  42 -               s32 mind = 40;
  43 +               s32 mind = 0x100000;
  44                 u8 minvcm = 0;
  45                 s32 minpoll = 249;
  46                 s32 curr;