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ath9k_hw: Fix magnitude/phase coeff correction

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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>
This commit is contained in:
Rajkumar Manoharan 2011-09-15 19:02:25 +05:30 committed by John W. Linville
parent 491b209d06
commit e9c10469cf
1 changed files with 2 additions and 1 deletions
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3
drivers/net/wireless/ath/ath9k/ar9003_calib.c
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@ -652,8 +652,9 @@ 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;
}
mp_coeff[outlier_idx] = mp_avg;
}
static void ar9003_hw_tx_iqcal_load_avg_2_passes(struct ath_hw *ah,