When the hardware is configured in HT20 mode, noise floor readings for the extension channel often return invalid values, which keep the values in the NF history buffer at the hardware-specific maximum limit. Fix this by discarding the extension channel values when in HT20 mode. Signed-off-by: Felix Fietkau <nbd@xxxxxxxxxxx> --- --- a/drivers/net/wireless/ath/ath9k/ar5008_phy.c +++ b/drivers/net/wireless/ath/ath9k/ar5008_phy.c @@ -1508,6 +1508,9 @@ static void ar5008_hw_do_getnf(struct at nf = MS(REG_READ(ah, AR_PHY_CH2_CCA), AR_PHY_CH2_MINCCA_PWR); nfarray[2] = sign_extend(nf, 9); + if (!IS_CHAN_HT40(ah->curchan)) + return; + nf = MS(REG_READ(ah, AR_PHY_EXT_CCA), AR_PHY_EXT_MINCCA_PWR); nfarray[3] = sign_extend(nf, 9); --- a/drivers/net/wireless/ath/ath9k/ar9002_phy.c +++ b/drivers/net/wireless/ath/ath9k/ar9002_phy.c @@ -477,7 +477,8 @@ static void ar9002_hw_do_getnf(struct at nfarray[0] = sign_extend(nf, 9); nf = MS(REG_READ(ah, AR_PHY_EXT_CCA), AR9280_PHY_EXT_MINCCA_PWR); - nfarray[3] = sign_extend(nf, 9); + if (IS_CHAN_HT40(ah->curchan)) + nfarray[3] = sign_extend(nf, 9); if (AR_SREV_9285(ah) || AR_SREV_9271(ah)) return; @@ -486,7 +487,8 @@ static void ar9002_hw_do_getnf(struct at nfarray[1] = sign_extend(nf, 9); nf = MS(REG_READ(ah, AR_PHY_CH1_EXT_CCA), AR9280_PHY_CH1_EXT_MINCCA_PWR); - nfarray[4] = sign_extend(nf, 9); + if (IS_CHAN_HT40(ah->curchan)) + nfarray[4] = sign_extend(nf, 9); } static void ar9002_hw_set_nf_limits(struct ath_hw *ah) --- a/drivers/net/wireless/ath/ath9k/ar9003_phy.c +++ b/drivers/net/wireless/ath/ath9k/ar9003_phy.c @@ -1029,6 +1029,9 @@ static void ar9003_hw_do_getnf(struct at nf = MS(REG_READ(ah, AR_PHY_CCA_2), AR_PHY_CH2_MINCCA_PWR); nfarray[2] = sign_extend(nf, 9); + if (!IS_CHAN_HT40(ah->curchan)) + return; + nf = MS(REG_READ(ah, AR_PHY_EXT_CCA), AR_PHY_EXT_MINCCA_PWR); nfarray[3] = sign_extend(nf, 9); -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
