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Add fix for rt5390/rt3290 regression (rhbz 950735)

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This commit is contained in:
Josh Boyer 2013-06-12 07:31:43 -04:00
parent 18e50ce8f8
commit 972606b895
2 changed files with 80 additions and 0 deletions
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9
kernel.spec
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@ -767,6 +767,9 @@ Patch25040: tuntap-set-SOCK_ZEROCOPY-flag-during-open.patch
Patch25041: x86-mtrr-Fix-original-mtrr-range-get-for-mtrr_cleanup.patch
Patch25042: x86-range-make-add_range-use-blank-slot.patch
#rhbz 950735
Patch25045: rt2800-fix-RT5390-RT3290-TX-power-settings-regression.patch
# END OF PATCH DEFINITIONS
%endif
@ -1478,6 +1481,9 @@ ApplyPatch tuntap-set-SOCK_ZEROCOPY-flag-during-open.patch
ApplyPatch x86-mtrr-Fix-original-mtrr-range-get-for-mtrr_cleanup.patch
ApplyPatch x86-range-make-add_range-use-blank-slot.patch
#rhbz 950735
ApplyPatch rt2800-fix-RT5390-RT3290-TX-power-settings-regression.patch
# END OF PATCH APPLICATIONS
%endif
@ -2283,6 +2289,9 @@ fi
# ||----w |
# || ||
%changelog
* Wed Jun 12 2013 Josh Boyer <jwboyer@redhat.com>
- Add fix for rt5390/rt3290 regression (rhbz 950735)
* Tue Jun 11 2013 Dave Jones <davej@redhat.com>
- Disable soft lockup detector on virtual machines. (rhbz 971139)

71
rt2800-fix-RT5390-RT3290-TX-power-settings-regression.patch Normal file
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@ -0,0 +1,71 @@
My change:
commit cee2c7315f60beeff6137ee59e99acc77d636eeb
Author: Stanislaw Gruszka <sgruszka@redhat.com>
Date: Fri Oct 5 13:44:09 2012 +0200
rt2800: use BBP_R1 for setting tx power
unfortunately does not work well with RT5390 and RT3290 chips as they
require different temperature compensation TX power settings (TSSI
tuning). Since that commit make wireless connection very unstable on
those chips, restore previous behavior to fix regression. Once we
implement proper TSSI tuning on 5390/3290 we can restore back setting
TX power by BBP_R1 register for those chips.
Reported-and-tested-by: Mike Romberg <mike-romberg@comcast.net>
Cc: stable@vger.kernel.org
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
---
drivers/net/wireless/rt2x00/rt2800lib.c | 29 ++++++++++++++++++-----------
1 file changed, 18 insertions(+), 11 deletions(-)
diff --git a/drivers/net/wireless/rt2x00/rt2800lib.c b/drivers/net/wireless/rt2x00/rt2800lib.c
index 92849e5..8b679df 100644
--- a/drivers/net/wireless/rt2x00/rt2800lib.c
+++ b/drivers/net/wireless/rt2x00/rt2800lib.c
@@ -2634,19 +2634,26 @@ static void rt2800_config_txpower(struct rt2x00_dev *rt2x00dev,
* TODO: we do not use +6 dBm option to do not increase power beyond
* regulatory limit, however this could be utilized for devices with
* CAPABILITY_POWER_LIMIT.
+ *
+ * TODO: add different temperature compensation code for RT3290 & RT5390
+ * to allow to use BBP_R1 for those chips.
*/
- rt2800_bbp_read(rt2x00dev, 1, &r1);
- if (delta <= -12) {
- power_ctrl = 2;
- delta += 12;
- } else if (delta <= -6) {
- power_ctrl = 1;
- delta += 6;
- } else {
- power_ctrl = 0;
+ if (!rt2x00_rt(rt2x00dev, RT3290) &&
+ !rt2x00_rt(rt2x00dev, RT5390)) {
+ rt2800_bbp_read(rt2x00dev, 1, &r1);
+ if (delta <= -12) {
+ power_ctrl = 2;
+ delta += 12;
+ } else if (delta <= -6) {
+ power_ctrl = 1;
+ delta += 6;
+ } else {
+ power_ctrl = 0;
+ }
+ rt2x00_set_field8(&r1, BBP1_TX_POWER_CTRL, power_ctrl);
+ rt2800_bbp_write(rt2x00dev, 1, r1);
}
- rt2x00_set_field8(&r1, BBP1_TX_POWER_CTRL, power_ctrl);
- rt2800_bbp_write(rt2x00dev, 1, r1);
+
offset = TX_PWR_CFG_0;
for (i = 0; i < EEPROM_TXPOWER_BYRATE_SIZE; i += 2) {
--
1.7.11.7
--
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