---- a/drivers/net/wireless/ath/ath9k/ar5008_phy.c
-+++ b/drivers/net/wireless/ath/ath9k/ar5008_phy.c
-@@ -1497,50 +1497,25 @@ static bool ar5008_hw_ani_control_new(st
- static void ar5008_hw_do_getnf(struct ath_hw *ah,
- int16_t nfarray[NUM_NF_READINGS])
- {
-- struct ath_common *common = ath9k_hw_common(ah);
- int16_t nf;
-
- nf = MS(REG_READ(ah, AR_PHY_CCA), AR_PHY_MINCCA_PWR);
-- if (nf & 0x100)
-- nf = 0 - ((nf ^ 0x1ff) + 1);
-- ath_print(common, ATH_DBG_CALIBRATE,
-- "NF calibrated [ctl] [chain 0] is %d\n", nf);
-- nfarray[0] = nf;
-+ nfarray[0] = sign_extend(nf, 9);
-
- nf = MS(REG_READ(ah, AR_PHY_CH1_CCA), AR_PHY_CH1_MINCCA_PWR);
-- if (nf & 0x100)
-- nf = 0 - ((nf ^ 0x1ff) + 1);
-- ath_print(common, ATH_DBG_CALIBRATE,
-- "NF calibrated [ctl] [chain 1] is %d\n", nf);
-- nfarray[1] = nf;
-+ nfarray[1] = sign_extend(nf, 9);
-
- nf = MS(REG_READ(ah, AR_PHY_CH2_CCA), AR_PHY_CH2_MINCCA_PWR);
-- if (nf & 0x100)
-- nf = 0 - ((nf ^ 0x1ff) + 1);
-- ath_print(common, ATH_DBG_CALIBRATE,
-- "NF calibrated [ctl] [chain 2] is %d\n", nf);
-- nfarray[2] = nf;
-+ nfarray[2] = sign_extend(nf, 9);
-
- nf = MS(REG_READ(ah, AR_PHY_EXT_CCA), AR_PHY_EXT_MINCCA_PWR);
-- if (nf & 0x100)
-- nf = 0 - ((nf ^ 0x1ff) + 1);
-- ath_print(common, ATH_DBG_CALIBRATE,
-- "NF calibrated [ext] [chain 0] is %d\n", nf);
-- nfarray[3] = nf;
-+ nfarray[3] = sign_extend(nf, 9);
-
- nf = MS(REG_READ(ah, AR_PHY_CH1_EXT_CCA), AR_PHY_CH1_EXT_MINCCA_PWR);
-- if (nf & 0x100)
-- nf = 0 - ((nf ^ 0x1ff) + 1);
-- ath_print(common, ATH_DBG_CALIBRATE,
-- "NF calibrated [ext] [chain 1] is %d\n", nf);
-- nfarray[4] = nf;
-+ nfarray[4] = sign_extend(nf, 9);
-
- nf = MS(REG_READ(ah, AR_PHY_CH2_EXT_CCA), AR_PHY_CH2_EXT_MINCCA_PWR);
-- if (nf & 0x100)
-- nf = 0 - ((nf ^ 0x1ff) + 1);
-- ath_print(common, ATH_DBG_CALIBRATE,
-- "NF calibrated [ext] [chain 2] is %d\n", nf);
-- nfarray[5] = nf;
-+ nfarray[5] = sign_extend(nf, 9);
- }
-
- static void ar5008_hw_loadnf(struct ath_hw *ah, struct ath9k_channel *chan)
---- a/drivers/net/wireless/ath/ath9k/ar9002_phy.c
-+++ b/drivers/net/wireless/ath/ath9k/ar9002_phy.c
-@@ -471,47 +471,22 @@ static u32 ar9002_hw_compute_pll_control
- static void ar9002_hw_do_getnf(struct ath_hw *ah,
- int16_t nfarray[NUM_NF_READINGS])
- {
-- struct ath_common *common = ath9k_hw_common(ah);
- int16_t nf;
-
- nf = MS(REG_READ(ah, AR_PHY_CCA), AR9280_PHY_MINCCA_PWR);
--
-- if (nf & 0x100)
-- nf = 0 - ((nf ^ 0x1ff) + 1);
-- ath_print(common, ATH_DBG_CALIBRATE,
-- "NF calibrated [ctl] [chain 0] is %d\n", nf);
--
-- nfarray[0] = nf;
--
-- if (!AR_SREV_9285(ah) && !AR_SREV_9271(ah)) {
-- nf = MS(REG_READ(ah, AR_PHY_CH1_CCA),
-- AR9280_PHY_CH1_MINCCA_PWR);
--
-- if (nf & 0x100)
-- nf = 0 - ((nf ^ 0x1ff) + 1);
-- ath_print(common, ATH_DBG_CALIBRATE,
-- "NF calibrated [ctl] [chain 1] is %d\n", nf);
-- nfarray[1] = nf;
-- }
-+ nfarray[0] = sign_extend(nf, 9);
-
- nf = MS(REG_READ(ah, AR_PHY_EXT_CCA), AR9280_PHY_EXT_MINCCA_PWR);
-- if (nf & 0x100)
-- nf = 0 - ((nf ^ 0x1ff) + 1);
-- ath_print(common, ATH_DBG_CALIBRATE,
-- "NF calibrated [ext] [chain 0] is %d\n", nf);
--
-- nfarray[3] = nf;
--
-- if (!AR_SREV_9285(ah) && !AR_SREV_9271(ah)) {
-- nf = MS(REG_READ(ah, AR_PHY_CH1_EXT_CCA),
-- AR9280_PHY_CH1_EXT_MINCCA_PWR);
--
-- if (nf & 0x100)
-- nf = 0 - ((nf ^ 0x1ff) + 1);
-- ath_print(common, ATH_DBG_CALIBRATE,
-- "NF calibrated [ext] [chain 1] is %d\n", nf);
-- nfarray[4] = nf;
-- }
-+ nfarray[3] = sign_extend(nf, 9);
-+
-+ if (AR_SREV_9285(ah) || AR_SREV_9271(ah))
-+ return;
-+
-+ nf = MS(REG_READ(ah, AR_PHY_CH1_CCA), AR9280_PHY_CH1_MINCCA_PWR);
-+ 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);
- }
-
- static void ar9002_hw_set_nf_limits(struct ath_hw *ah)
--- a/drivers/net/wireless/ath/ath9k/calib.c
+++ b/drivers/net/wireless/ath/ath9k/calib.c
-@@ -182,6 +182,10 @@ static void ath9k_hw_nf_sanitize(struct
- if (!nf[i])
- continue;
-
-+ ath_print(common, ATH_DBG_CALIBRATE,
-+ "NF calibrated [%s] [chain %d] is %d\n",
-+ (i > 3 ? "ext" : "ctl"), i % 3, nf[i]);
-+
- if (nf[i] > limit->max) {
- ath_print(common, ATH_DBG_CALIBRATE,
- "NF[%d] (%d) > MAX (%d), correcting to MAX",
---- a/drivers/net/wireless/ath/ath9k/hw.h
-+++ b/drivers/net/wireless/ath/ath9k/hw.h
-@@ -853,6 +853,12 @@ static inline struct ath_hw_ops *ath9k_h
- return &ah->ops;
- }
-
-+static inline int sign_extend(int val, const int nbits)
-+{
-+ int order = BIT(nbits-1);
-+ return (val ^ order) - order;
-+}
-+
- /* Initialization, Detach, Reset */
- const char *ath9k_hw_probe(u16 vendorid, u16 devid);
- void ath9k_hw_deinit(struct ath_hw *ah);
---- a/drivers/net/wireless/ath/ath9k/ar9003_phy.c
-+++ b/drivers/net/wireless/ath/ath9k/ar9003_phy.c
-@@ -1018,50 +1018,25 @@ static bool ar9003_hw_ani_control(struct
- static void ar9003_hw_do_getnf(struct ath_hw *ah,
- int16_t nfarray[NUM_NF_READINGS])
- {
-- struct ath_common *common = ath9k_hw_common(ah);
- int16_t nf;
-
- nf = MS(REG_READ(ah, AR_PHY_CCA_0), AR_PHY_MINCCA_PWR);
-- if (nf & 0x100)
-- nf = 0 - ((nf ^ 0x1ff) + 1);
-- ath_print(common, ATH_DBG_CALIBRATE,
-- "NF calibrated [ctl] [chain 0] is %d\n", nf);
-- nfarray[0] = nf;
-+ nfarray[0] = sign_extend(nf, 9);
-
- nf = MS(REG_READ(ah, AR_PHY_CCA_1), AR_PHY_CH1_MINCCA_PWR);
-- if (nf & 0x100)
-- nf = 0 - ((nf ^ 0x1ff) + 1);
-- ath_print(common, ATH_DBG_CALIBRATE,
-- "NF calibrated [ctl] [chain 1] is %d\n", nf);
-- nfarray[1] = nf;
-+ nfarray[1] = sign_extend(nf, 9);
-
- nf = MS(REG_READ(ah, AR_PHY_CCA_2), AR_PHY_CH2_MINCCA_PWR);
-- if (nf & 0x100)
-- nf = 0 - ((nf ^ 0x1ff) + 1);
-- ath_print(common, ATH_DBG_CALIBRATE,
-- "NF calibrated [ctl] [chain 2] is %d\n", nf);
-- nfarray[2] = nf;
-+ nfarray[2] = sign_extend(nf, 9);
-
- nf = MS(REG_READ(ah, AR_PHY_EXT_CCA), AR_PHY_EXT_MINCCA_PWR);
-- if (nf & 0x100)
-- nf = 0 - ((nf ^ 0x1ff) + 1);
-- ath_print(common, ATH_DBG_CALIBRATE,
-- "NF calibrated [ext] [chain 0] is %d\n", nf);
-- nfarray[3] = nf;
-+ nfarray[3] = sign_extend(nf, 9);
-
- nf = MS(REG_READ(ah, AR_PHY_EXT_CCA_1), AR_PHY_CH1_EXT_MINCCA_PWR);
-- if (nf & 0x100)
-- nf = 0 - ((nf ^ 0x1ff) + 1);
-- ath_print(common, ATH_DBG_CALIBRATE,
-- "NF calibrated [ext] [chain 1] is %d\n", nf);
-- nfarray[4] = nf;
-+ nfarray[4] = sign_extend(nf, 9);
-
- nf = MS(REG_READ(ah, AR_PHY_EXT_CCA_2), AR_PHY_CH2_EXT_MINCCA_PWR);
-- if (nf & 0x100)
-- nf = 0 - ((nf ^ 0x1ff) + 1);
-- ath_print(common, ATH_DBG_CALIBRATE,
-- "NF calibrated [ext] [chain 2] is %d\n", nf);
-- nfarray[5] = nf;
-+ nfarray[5] = sign_extend(nf, 9);
- }
+@@ -172,26 +172,9 @@ void ath9k_hw_loadnf(struct ath_hw *ah,
+ struct ath9k_nfcal_hist *h;
+ unsigned i, j;
+ int32_t val;
+- u8 chainmask;
++ u8 chainmask = (ah->rxchainmask << 3) | ah->rxchainmask;
+ struct ath_common *common = ath9k_hw_common(ah);
+
+- if (AR_SREV_9300_20_OR_LATER(ah))
+- chainmask = 0x3F;
+- else if (AR_SREV_9285(ah) || AR_SREV_9271(ah))
+- chainmask = 0x9;
+- else if (AR_SREV_9280(ah) || AR_SREV_9287(ah)) {
+- if ((ah->rxchainmask & 0x2) || (ah->rxchainmask & 0x4))
+- chainmask = 0x1B;
+- else
+- chainmask = 0x09;
+- } else {
+- if (ah->rxchainmask & 0x4)
+- chainmask = 0x3F;
+- else if (ah->rxchainmask & 0x2)
+- chainmask = 0x1B;
+- else
+- chainmask = 0x09;
+- }
+ h = ah->nfCalHist;
- static void ar9003_hw_set_nf_limits(struct ath_hw *ah)
+ for (i = 0; i < NUM_NF_READINGS; i++) {