ath9k_hw: disable Tx IQ calibration on half/quarter channels

It does not work properly and reduces throughput.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/ath/ath9k/ar9003_calib.c b/drivers/net/wireless/ath/ath9k/ar9003_calib.c
index 63089cc..a0387a0 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/ar9003_calib.c
+++ b/drivers/net/wireless/ath/ath9k/ar9003_calib.c
@@ -1000,10 +1000,12 @@ static bool ar9003_hw_init_cal(struct ath_hw *ah,
        if (mci && IS_CHAN_2GHZ(chan) && run_agc_cal)
                ar9003_mci_init_cal_req(ah, &is_reusable);
 
-       txiqcal_done = ar9003_hw_tx_iq_cal_run(ah);
-       REG_WRITE(ah, AR_PHY_ACTIVE, AR_PHY_ACTIVE_DIS);
-       udelay(5);
-       REG_WRITE(ah, AR_PHY_ACTIVE, AR_PHY_ACTIVE_EN);
+       if (!(IS_CHAN_HALF_RATE(chan) || IS_CHAN_QUARTER_RATE(chan))) {
+               txiqcal_done = ar9003_hw_tx_iq_cal_run(ah);
+               REG_WRITE(ah, AR_PHY_ACTIVE, AR_PHY_ACTIVE_DIS);
+               udelay(5);
+               REG_WRITE(ah, AR_PHY_ACTIVE, AR_PHY_ACTIVE_EN);
+       }
 
 skip_tx_iqcal:
        if (run_agc_cal || !(ah->ah_flags & AH_FASTCC)) {