This is a note to let you know that I've just added the patch titled
[PATCH] ath9k: fix max noise floor threshold
to the 3.0-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-max-noise-floor-threshold.patch
and it can be found in the queue-3.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 6d19cb7b3325e6c460db0f07f178793f4500783a Mon Sep 17 00:00:00 2001
From: Rajkumar Manoharan <[email protected]>
Date: Thu, 15 Mar 2012 06:08:04 +0530
Subject: [PATCH] ath9k: fix max noise floor threshold
From: Rajkumar Manoharan <[email protected]>
commit 2ee0a07028d2cde6e131b73f029dae2b93c50f3a upstream.
Currently the maximum noise floor limit is set as too high (-60dB). The
assumption of having a higher threshold limit is that it would help
de-sensitize the receiver (reduce phy errors) from continuous
interference. But when we have a bursty interference where there are
collisions and then free air time and if the receiver is desensitized too
much, it will miss the normal packets too. Lets make use of chips
specific min, nom and max limits always. This patch helps to improve the
connection stability in congested networks.
Cc: Paul Stewart <[email protected]>
Tested-by: Gary Morain <[email protected]>
Signed-off-by: Madhan Jaganathan <[email protected]>
Signed-off-by: Rajkumar Manoharan <[email protected]>
Signed-off-by: John W. Linville <[email protected]>
[bwh: Backported to 3.0/3.2: adjust context]
Signed-off-by: Ben Hutchings <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/net/wireless/ath/ath9k/calib.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
--- a/drivers/net/wireless/ath/ath9k/calib.c
+++ b/drivers/net/wireless/ath/ath9k/calib.c
@@ -19,7 +19,6 @@
/* Common calibration code */
-#define ATH9K_NF_TOO_HIGH -60
static int16_t ath9k_hw_get_nf_hist_mid(int16_t *nfCalBuffer)
{
@@ -335,10 +334,10 @@ static void ath9k_hw_nf_sanitize(struct
"NF calibrated [%s] [chain %d] is %d\n",
(i >= 3 ? "ext" : "ctl"), i % 3, nf[i]);
- if (nf[i] > ATH9K_NF_TOO_HIGH) {
+ if (nf[i] > limit->max) {
ath_dbg(common, ATH_DBG_CALIBRATE,
"NF[%d] (%d) > MAX (%d), correcting to MAX\n",
- i, nf[i], ATH9K_NF_TOO_HIGH);
+ i, nf[i], limit->max);
nf[i] = limit->max;
} else if (nf[i] < limit->min) {
ath_dbg(common, ATH_DBG_CALIBRATE,
Patches currently in stable-queue which might be from [email protected]
are
queue-3.0/ath9k-fix-max-noise-floor-threshold.patch
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