From 9369746050e838c57e357f0caa552386ad65a82d Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Fri, 30 Jul 2010 21:02:10 +0200
Subject: ath9k_hw: fix periodic noise floor calibration on AR9003
The periodic noise floor calibration is broken on this chip family, because
it keeps triggering a software-filtered noise floor calibration, but never
reads the result before uploading the history buffer value to the hardware.
Fix this with a call to ath9k_hw_getnf(), just like on AR9002.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Acked-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
drivers/net/wireless/ath/ath9k/ar9003_calib.c | 6 ++++++
1 file changed, 6 insertions(+)
(limited to 'drivers')
diff --git a/drivers/net/wireless/ath/ath9k/ar9003_calib.c b/drivers/net/wireless/ath/ath9k/ar9003_calib.c
index 938365eebae6..f51ab89c989d 100644
--- a/drivers/net/wireless/ath/ath9k/ar9003_calib.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_calib.c
@@ -148,6 +148,12 @@ static bool ar9003_hw_calibrate(struct ath_hw *ah,
/* Do NF cal only at longer intervals */
if (longcal) {
+ /*
+ * Get the value from the previous NF cal and update
+ * history buffer.
+ */
+ ath9k_hw_getnf(ah, chan);
+
/*
* Load the NF from history buffer of the current channel.
* NF is slow time-variant, so it is OK to use a historical
--
cgit v1.2.1