On Fri, Jul 10, 2009 at 11:02:58AM -0700, Luis R. Rodriguez wrote:
> On Thu, Jul 9, 2009 at 2:12 PM, Steven Luo<steven@xxxxxxxxxxxxx> wrote:
> > From: Steven Luo <steven@xxxxxxxxxxxxx>
> >
> > It seems that OFDM weak signal detection should be enabled after an ANI
> > state reset, as indicated by the initial setting of ofdmWeakSigDetectOff
> > and what the open Atheros HAL does. Unfortunately, the reversed sense
> > of ofdmWeakSigDetectOff (true if weak signal detection is NOT enabled)
> > seems to have resulted in a mixup here, causing weak signal detection to
> > be disabled.
> >
> > This patch significantly improves reception and throughput from distant
> > stations for my AR5416-based AP running compat-wireless 2009-06-25.
> >
> > Signed-off-by: Steven Luo <steven@xxxxxxxxxxxxx>
> > Cc: stable@xxxxxxxxxx
> > ---
>
> NACK for now, please give us a chance to review this -- this may
> actually be correct.
Please try this patch instead, I've only compile tested this.
From: Luis R. Rodriguez <lrodriguez@xxxxxxxxxxx>
Subject: [PATCH] ath9k: Tune ANI function processing on AP mode during ANI reset
For AP mode we must tune ANI specially for 2 GHz and
for 5 GHz. We mask in only the flags we want to toggle
on ath9k_hw_ani_control() through the ah->ani_function
bitmask, this will take care of ignoring changes during
ANI reset which we were disabling before.
Reported-by: Steven Luo <steven@xxxxxxxxxxxxx>
Cc: Bennyam Malavazi <Bennyam.Malavazi@xxxxxxxxxxx
Cc: Jouni Malinen <Jouni.Malinen@xxxxxxxxxxx>
Signed-off-by: Luis R. Rodriguez <lrodriguez@xxxxxxxxxxx>
---
drivers/net/wireless/ath/ath9k/ani.c | 13 +++++++++++++
1 files changed, 13 insertions(+), 0 deletions(-)
diff --git a/drivers/net/wireless/ath/ath9k/ani.c b/drivers/net/wireless/ath/ath9k/ani.c
--- a/drivers/net/wireless/ath/ath9k/ani.c
+++ b/drivers/net/wireless/ath/ath9k/ani.c
@@ -478,6 +478,19 @@ void ath9k_ani_reset(struct ath_hw *ah)
"Reset ANI state opmode %u\n", ah->opmode);
ah->stats.ast_ani_reset++;
+ if (ah->opmode == NL80211_IFTYPE_AP ||
+ ah->opmode == NL80211_IFTYPE_AP) {
+ /*
+ * ath9k_hw_ani_control() will only process items set on
+ * ah->ani_function
+ */
+ if (IS_CHAN_2GHZ(chan))
+ ah->ani_function = (ATH9K_ANI_SPUR_IMMUNITY_LEVEL |
+ ATH9K_ANI_FIRSTEP_LEVEL);
+ else
+ ah->ani_function = 0;
+ }
+
ath9k_hw_ani_control(ah, ATH9K_ANI_NOISE_IMMUNITY_LEVEL, 0);
ath9k_hw_ani_control(ah, ATH9K_ANI_SPUR_IMMUNITY_LEVEL, 0);
ath9k_hw_ani_control(ah, ATH9K_ANI_FIRSTEP_LEVEL, 0);
--
1.6.3.3
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