diff options
| author | Rajkumar Manoharan <rmanoharan@atheros.com> | 2011-01-17 09:51:40 (GMT) |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2011-01-17 21:09:03 (GMT) |
| commit | 811ea256b30b37091b5bbf41517404cf98ab56c1 (patch) | |
| tree | a4d603ae93da4ae091fde4b4d6dca4d7a1035170 /drivers/net/wireless/ath/ath9k | |
| parent | dc738cb6c5d5594de4bdf3b7839a250b032152e7 (diff) | |
| download | linux-fsl-qoriq-811ea256b30b37091b5bbf41517404cf98ab56c1.tar.xz | |
ath9k_hw: do PA offset calibration only on longcal interval
The power detector adc offset calibration has to be done
on 4 minutes interval (longcal * pa_skip_count). But the commit
"ath9k_hw: fix a noise floor calibration related race condition"
makes the PA calibration executed more frequently beased on
nfcal_pending value. Running PAOffset calibration lesser than
longcal interval doesn't help anything and the worse part is that
it causes NF load timeouts and RX deaf conditions.
In a very noisy environment, where the distance b/w AP & station
is ~10 meter and running a downlink udp traffic with frequent
background scan causes "Timeout while waiting for nf to load:
AR_PHY_AGC_CONTROL=0x40d1a" and moves the chip into deaf state.
This issue was originaly reported in Android platform where
the network-manager application does bgscan more frequently
on AR9271 chips. (AR9285 family usb device).
Cc: stable@kernel.org
Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: Rajkumar Manoharan <rmanoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/ath/ath9k')
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/ar9002_calib.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/net/wireless/ath/ath9k/ar9002_calib.c b/drivers/net/wireless/ath/ath9k/ar9002_calib.c index ea2e7d7..5e300bd 100644 --- a/drivers/net/wireless/ath/ath9k/ar9002_calib.c +++ b/drivers/net/wireless/ath/ath9k/ar9002_calib.c @@ -679,10 +679,6 @@ static bool ar9002_hw_calibrate(struct ath_hw *ah, /* Do NF cal only at longer intervals */ if (longcal || nfcal_pending) { - /* Do periodic PAOffset Cal */ - ar9002_hw_pa_cal(ah, false); - ar9002_hw_olc_temp_compensation(ah); - /* * Get the value from the previous NF cal and update * history buffer. @@ -697,8 +693,12 @@ static bool ar9002_hw_calibrate(struct ath_hw *ah, ath9k_hw_loadnf(ah, ah->curchan); } - if (longcal) + if (longcal) { ath9k_hw_start_nfcal(ah, false); + /* Do periodic PAOffset Cal */ + ar9002_hw_pa_cal(ah, false); + ar9002_hw_olc_temp_compensation(ah); + } } return iscaldone; |