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authorFelix Fietkau <nbd@openwrt.org>2010-07-23 02:07:48 (GMT)
committerJohn W. Linville <linville@tuxdriver.com>2010-07-26 19:32:42 (GMT)
commit866b7780fce95989dfc85f3e372635f5147e0d90 (patch)
tree795a2705b44be3f60f3d4a0ff46fddbee0337197
parent4cee78614cfa046a26c4fbf313d5bbacb3ad8efc (diff)
downloadlinux-866b7780fce95989dfc85f3e372635f5147e0d90.tar.xz
ath9k_hw: fix invalid extension channel noisefloor readings in HT20
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@openwrt.org> Signed-off-by: John W. Linville <linville@tuxdriver.com>
-rw-r--r--drivers/net/wireless/ath/ath9k/ar5008_phy.c3
-rw-r--r--drivers/net/wireless/ath/ath9k/ar9002_phy.c6
-rw-r--r--drivers/net/wireless/ath/ath9k/ar9003_phy.c3
3 files changed, 10 insertions, 2 deletions
diff --git a/drivers/net/wireless/ath/ath9k/ar5008_phy.c b/drivers/net/wireless/ath/ath9k/ar5008_phy.c
index 4a910b7..3d2c867 100644
--- a/drivers/net/wireless/ath/ath9k/ar5008_phy.c
+++ b/drivers/net/wireless/ath/ath9k/ar5008_phy.c
@@ -1506,6 +1506,9 @@ static void ar5008_hw_do_getnf(struct ath_hw *ah,
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);
diff --git a/drivers/net/wireless/ath/ath9k/ar9002_phy.c b/drivers/net/wireless/ath/ath9k/ar9002_phy.c
index 4922b8d..adbf031 100644
--- 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 ath_hw *ah,
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 ath_hw *ah,
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)
diff --git a/drivers/net/wireless/ath/ath9k/ar9003_phy.c b/drivers/net/wireless/ath/ath9k/ar9003_phy.c
index 7c93338..a753a43 100644
--- 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 ath_hw *ah,
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);