2.6.37-stable review patch. If anyone has any objections, please let us know.
------------------ From: Rajkumar Manoharan <[email protected]> commit 811ea256b30b37091b5bbf41517404cf98ab56c1 upstream. 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). Signed-off-by: Vasanthakumar Thiagarajan <[email protected]> Signed-off-by: Rajkumar Manoharan <[email protected]> Signed-off-by: John W. Linville <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- drivers/net/wireless/ath/ath9k/ar9002_calib.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) --- a/drivers/net/wireless/ath/ath9k/ar9002_calib.c +++ b/drivers/net/wireless/ath/ath9k/ar9002_calib.c @@ -681,10 +681,6 @@ static bool ar9002_hw_calibrate(struct a /* 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. @@ -699,8 +695,12 @@ static bool ar9002_hw_calibrate(struct a 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; _______________________________________________ stable mailing list [email protected] http://linux.kernel.org/mailman/listinfo/stable
