From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from nbd.name ([88.198.39.176]:55125 "EHLO ds10.nbd.name" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752343Ab0GWCHu (ORCPT ); Thu, 22 Jul 2010 22:07:50 -0400 Message-ID: <4C48F974.4050408@openwrt.org> Date: Fri, 23 Jul 2010 04:07:48 +0200 From: Felix Fietkau MIME-Version: 1.0 To: linux-wireless CC: "Luis R. Rodriguez" , "John W. Linville" Subject: [PATCH] ath9k_hw: fix invalid extension channel noisefloor readings in HT20 Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-wireless-owner@vger.kernel.org List-ID: 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 --- --- 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);