This is a note to let you know that I've just added the patch titled
rt2x00: Fix transmit power troubles on some Ralink RT30xx cards
to the 3.8-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
rt2x00-fix-transmit-power-troubles-on-some-ralink-rt30xx-cards.patch
and it can be found in the queue-3.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 7e9dafd873034dd64ababcb858be424c4780ae13 Mon Sep 17 00:00:00 2001
From: "Alex A. Mihaylov" <minimumlaw@xxxxxxxxxx>
Date: Mon, 15 Apr 2013 07:29:35 +0400
Subject: rt2x00: Fix transmit power troubles on some Ralink RT30xx cards
From: "Alex A. Mihaylov" <minimumlaw@xxxxxxxxxx>
commit 7e9dafd873034dd64ababcb858be424c4780ae13 upstream.
Some cards on Ralink RT30xx chipset not have correctly TX_MIXER_GAIN
value in them EEPROM/EFUSE. In this case, we must use default value,
but always used EEPROM/EFUSE value. As result we have tranmitt power
range from -10dBm to +6dBm instead 0dBm to +16dBm.
Correctly value in EEPROM/EFUSE is one or more for RT3070 and two or
more for other RT30xx chips.
Tested on Canyon CNP-WF518N1 usb Wi-Fi dongle and Jorjin WN8020 usb
embedded Wi-Fi module.
Signed-off-by: Alex A. Mihaylov <minimumlaw@xxxxxxxxxx>
Acked-by: Gertjan van Wingerde <gwingerde@xxxxxxxxx>
Acked-by: Stanislaw Gruszka <sgruszka@xxxxxxxxxx>
Signed-off-by: John W. Linville <linville@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/wireless/rt2x00/rt2800lib.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
--- a/drivers/net/wireless/rt2x00/rt2800lib.c
+++ b/drivers/net/wireless/rt2x00/rt2800lib.c
@@ -4386,6 +4386,8 @@ static int rt2800_init_rfcsr(struct rt2x
if (!rt2x00_rt(rt2x00dev, RT5390) &&
!rt2x00_rt(rt2x00dev, RT5392)) {
+ u8 min_gain = rt2x00_rt(rt2x00dev, RT3070) ? 1 : 2;
+
rt2800_rfcsr_read(rt2x00dev, 17, &rfcsr);
rt2x00_set_field8(&rfcsr, RFCSR17_TX_LO1_EN, 0);
if (rt2x00_rt(rt2x00dev, RT3070) ||
@@ -4396,8 +4398,10 @@ static int rt2800_init_rfcsr(struct rt2x
&rt2x00dev->cap_flags))
rt2x00_set_field8(&rfcsr, RFCSR17_R, 1);
}
- rt2x00_set_field8(&rfcsr, RFCSR17_TXMIXER_GAIN,
- drv_data->txmixer_gain_24g);
+ if (drv_data->txmixer_gain_24g >= min_gain) {
+ rt2x00_set_field8(&rfcsr, RFCSR17_TXMIXER_GAIN,
+ drv_data->txmixer_gain_24g);
+ }
rt2800_rfcsr_write(rt2x00dev, 17, rfcsr);
}
Patches currently in stable-queue which might be from minimumlaw@xxxxxxxxxx are
queue-3.8/rt2x00-fix-transmit-power-troubles-on-some-ralink-rt30xx-cards.patch
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