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From: Felix Fietkau <nbd@openwrt.org>
Date: Sat, 18 Oct 2014 13:39:11 +0200
Subject: [PATCH] ath9k_hw: do not run NF and periodic calibration at the
same time
It can cause inconsistent calibration results or in some cases turn the
radio deaf.
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
---
--- a/drivers/net/wireless/ath/ath9k/ar9002_calib.c
+++ b/drivers/net/wireless/ath/ath9k/ar9002_calib.c
@@ -660,27 +660,26 @@ static void ar9002_hw_olc_temp_compensat
static int ar9002_hw_calibrate(struct ath_hw *ah, struct ath9k_channel *chan,
u8 rxchainmask, bool longcal)
{
- bool iscaldone = true;
struct ath9k_cal_list *currCal = ah->cal_list_curr;
- bool nfcal, nfcal_pending = false;
+ bool nfcal, nfcal_pending = false, percal_pending;
int ret;
nfcal = !!(REG_READ(ah, AR_PHY_AGC_CONTROL) & AR_PHY_AGC_CONTROL_NF);
if (ah->caldata)
nfcal_pending = test_bit(NFCAL_PENDING, &ah->caldata->cal_flags);
- if (currCal && !nfcal &&
- (currCal->calState == CAL_RUNNING ||
- currCal->calState == CAL_WAITING)) {
- iscaldone = ar9002_hw_per_calibration(ah, chan,
- rxchainmask, currCal);
- if (iscaldone) {
- ah->cal_list_curr = currCal = currCal->calNext;
-
- if (currCal->calState == CAL_WAITING) {
- iscaldone = false;
- ath9k_hw_reset_calibration(ah, currCal);
- }
+ percal_pending = (currCal &&
+ (currCal->calState == CAL_RUNNING ||
+ currCal->calState == CAL_WAITING));
+
+ if (percal_pending && !nfcal) {
+ if (!ar9002_hw_per_calibration(ah, chan, rxchainmask, currCal))
+ return 0;
+
+ ah->cal_list_curr = currCal = currCal->calNext;
+ if (currCal->calState == CAL_WAITING) {
+ ath9k_hw_reset_calibration(ah, currCal);
+ return 0;
}
}
@@ -710,7 +709,7 @@ static int ar9002_hw_calibrate(struct at
}
}
- return iscaldone;
+ return !percal_pending;
}
/* Carrier leakage Calibration fix */
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