This is a note to let you know that I've just added the patch titled
ath9k_hw: fix a RTS/CTS timeout regression
to the 3.2-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_hw-fix-a-rts-cts-timeout-regression.patch
and it can be found in the queue-3.2 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 55a2bb4a6d5e8c7b324d003e130fd9aaf33be4e6 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <[email protected]>
Date: Sun, 5 Feb 2012 21:15:18 +0100
Subject: ath9k_hw: fix a RTS/CTS timeout regression
From: Felix Fietkau <[email protected]>
commit 55a2bb4a6d5e8c7b324d003e130fd9aaf33be4e6 upstream.
commit adb5066 "ath9k_hw: do not apply the 2.4 ghz ack timeout
workaround to cts" reduced the hardware CTS timeout to the normal
values specified by the standard, but it turns out while it doesn't
need the same extra time that it needs for the ACK timeout, it
does need more than the value specified in the standard, but only
for 2.4 GHz.
This patch brings the CTS timeout value in sync with the initialization
values, while still allowing adjustment for bigger distances.
Signed-off-by: Felix Fietkau <[email protected]>
Reported-by: Seth Forshee <[email protected]>
Reported-by: Marek Lindner <[email protected]>
Signed-off-by: John W. Linville <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/net/wireless/ath/ath9k/hw.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -1034,13 +1034,16 @@ void ath9k_hw_init_global_settings(struc
/*
* Workaround for early ACK timeouts, add an offset to match the
- * initval's 64us ack timeout value.
+ * initval's 64us ack timeout value. Use 48us for the CTS timeout.
* This was initially only meant to work around an issue with delayed
* BA frames in some implementations, but it has been found to fix ACK
* timeout issues in other cases as well.
*/
- if (conf->channel && conf->channel->band == IEEE80211_BAND_2GHZ)
+ if (conf->channel && conf->channel->band == IEEE80211_BAND_2GHZ) {
acktimeout += 64 - sifstime - ah->slottime;
+ ctstimeout += 48 - sifstime - ah->slottime;
+ }
+
ath9k_hw_set_sifs_time(ah, sifstime);
ath9k_hw_setslottime(ah, slottime);
Patches currently in stable-queue which might be from [email protected] are
queue-3.2/ath9k_hw-fix-a-rts-cts-timeout-regression.patch
queue-3.2/ath9k-fix-a-wep-crypto-related-regression.patch
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