Commit e9c10469 authored Sep 15, 2011 by Rajkumar Manoharan Committed by John W. Linville Sep 19, 2011

ath9k_hw: Fix magnitude/phase coeff correction



Do the magnitude/phase coeff correction only if the outlier
is detected. Updating wrong magnitude/phase coeff factor
impacts not only tx gain setting but also leads to poor
performance in congested networks. In the clear environment
the impact is very minimal because the outlier happens
very rarely according to the past experiment. It occured
less than once every 1000 calibrations.

Cc: stable@kernel.org
Signed-off-by: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

parent 491b209d

drivers/net/wireless/ath/ath9k/ar9003_calib.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -652,9 +652,10 @@ static void ar9003_hw_detect_outlier(int *mp_coeff, int nmeasurement,
		outlier_idx = max_idx;
		else
		outlier_idx = min_idx;
		}

		mp_coeff[outlier_idx] = mp_avg;
		}
		}

		static void ar9003_hw_tx_iqcal_load_avg_2_passes(struct ath_hw *ah,
		u8 num_chains,