This is a note to let you know that I've just added the patch titled
ath9k: fix bug in tx power
to the 2.6.36-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:
ath9k-fix-bug-in-tx-power.patch
and it can be found in the queue-2.6.36 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 841051602e3fa18ea468fe5a177aa92b6eb44b56 Mon Sep 17 00:00:00 2001
From: Matteo Croce <[email protected]>
Date: Fri, 3 Dec 2010 02:25:08 +0100
Subject: ath9k: fix bug in tx power
From: Matteo Croce <[email protected]>
commit 841051602e3fa18ea468fe5a177aa92b6eb44b56 upstream.
The ath9k driver subtracts 3 dBm to the txpower as with two radios the
signal power is doubled.
The resulting value is assigned in an u16 which overflows and makes
the card work at full power.
Signed-off-by: Matteo Croce <[email protected]>
Signed-off-by: John W. Linville <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/net/wireless/ath/ath9k/eeprom_def.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
--- a/drivers/net/wireless/ath/ath9k/eeprom_def.c
+++ b/drivers/net/wireless/ath/ath9k/eeprom_def.c
@@ -1062,15 +1062,19 @@ static void ath9k_hw_set_def_power_per_r
case 1:
break;
case 2:
- scaledPower -= REDUCE_SCALED_POWER_BY_TWO_CHAIN;
+ if (scaledPower > REDUCE_SCALED_POWER_BY_TWO_CHAIN)
+ scaledPower -= REDUCE_SCALED_POWER_BY_TWO_CHAIN;
+ else
+ scaledPower = 0;
break;
case 3:
- scaledPower -= REDUCE_SCALED_POWER_BY_THREE_CHAIN;
+ if (scaledPower > REDUCE_SCALED_POWER_BY_THREE_CHAIN)
+ scaledPower -= REDUCE_SCALED_POWER_BY_THREE_CHAIN;
+ else
+ scaledPower = 0;
break;
}
- scaledPower = max((u16)0, scaledPower);
-
if (IS_CHAN_2GHZ(chan)) {
numCtlModes = ARRAY_SIZE(ctlModesFor11g) -
SUB_NUM_CTL_MODES_AT_2G_40;
Patches currently in stable-queue which might be from [email protected] are
queue-2.6.36/ath9k-fix-bug-in-tx-power.patch
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