4 files changed, 31 insertions, 20 deletions

diff --git a/drivers/net/wireless/ath/ath9k/ar9002_calib.c b/drivers/net/wireless/ath/ath9k/ar9002_calib.c
index d28a8d37f01f..fe7418aefc4a 100644
--- a/drivers/net/wireless/ath/ath9k/ar9002_calib.c
+++ b/drivers/net/wireless/ath/ath9k/ar9002_calib.c
@@ -687,8 +687,13 @@ static bool ar9002_hw_calibrate(struct ath_hw *ah,
 {
         bool iscaldone = true;
         struct ath9k_cal_list *currCal = ah->cal_list_curr;
+        bool nfcal, nfcal_pending = false;
 
-        if (currCal &&
+        nfcal = !!(REG_READ(ah, AR_PHY_AGC_CONTROL) & AR_PHY_AGC_CONTROL_NF);
+        if (ah->caldata)
+                nfcal_pending = ah->caldata->nfcal_pending;
+
+        if (currCal && !nfcal &&
             (currCal->calState == CAL_RUNNING ||
              currCal->calState == CAL_WAITING)) {
                 iscaldone = ar9002_hw_per_calibration(ah, chan,
@@ -704,7 +709,7 @@ static bool ar9002_hw_calibrate(struct ath_hw *ah,
         }
 
         /* Do NF cal only at longer intervals */
-        if (longcal) {
+        if (longcal || nfcal_pending) {
                 /* Do periodic PAOffset Cal */
                 ar9002_hw_pa_cal(ah, false);
                 ar9002_hw_olc_temp_compensation(ah);
@@ -713,16 +718,18 @@ static bool ar9002_hw_calibrate(struct ath_hw *ah,
                  * Get the value from the previous NF cal and update
                  * history buffer.
                  */
-                ath9k_hw_getnf(ah, chan);
-
-                /*
-                 * Load the NF from history buffer of the current channel.
-                 * NF is slow time-variant, so it is OK to use a historical
-                 * value.
-                 */
-                ath9k_hw_loadnf(ah, ah->curchan);
+                if (ath9k_hw_getnf(ah, chan)) {
+                        /*
+                         * Load the NF from history buffer of the current
+                         * channel.
+                         * NF is slow time-variant, so it is OK to use a
+                         * historical value.
+                         */
+                        ath9k_hw_loadnf(ah, ah->curchan);
+                }
 
-                ath9k_hw_start_nfcal(ah, false);
+                if (longcal)
+                        ath9k_hw_start_nfcal(ah, false);
         }
 
         return iscaldone;
@@ -872,6 +879,9 @@ static bool ar9002_hw_init_cal(struct ath_hw *ah, struct ath9k_channel *chan)
         /* Do NF Calibration after DC offset and other calibrations */
         ath9k_hw_start_nfcal(ah, true);
 
+        if (ah->caldata)
+                ah->caldata->nfcal_pending = true;
+
         ah->cal_list = ah->cal_list_last = ah->cal_list_curr = NULL;
 
         /* Enable IQ, ADC Gain and ADC DC offset CALs */
diff --git a/drivers/net/wireless/ath/ath9k/calib.c b/drivers/net/wireless/ath/ath9k/calib.c
index 18b5c0dcc1fc..45208690c0ec 100644
--- a/drivers/net/wireless/ath/ath9k/calib.c
+++ b/drivers/net/wireless/ath/ath9k/calib.c
@@ -156,6 +156,9 @@ EXPORT_SYMBOL(ath9k_hw_reset_calvalid);
 
 void ath9k_hw_start_nfcal(struct ath_hw *ah, bool update)
 {
+        if (ah->caldata)
+                ah->caldata->nfcal_pending = true;
+
         REG_SET_BIT(ah, AR_PHY_AGC_CONTROL,
                     AR_PHY_AGC_CONTROL_ENABLE_NF);
 
@@ -288,8 +291,7 @@ static void ath9k_hw_nf_sanitize(struct ath_hw *ah, s16 *nf)
         }
 }
 
-int16_t ath9k_hw_getnf(struct ath_hw *ah,
-                       struct ath9k_channel *chan)
+bool ath9k_hw_getnf(struct ath_hw *ah, struct ath9k_channel *chan)
 {
         struct ath_common *common = ath9k_hw_common(ah);
         int16_t nf, nfThresh;
@@ -299,7 +301,7 @@ int16_t ath9k_hw_getnf(struct ath_hw *ah,
         struct ath9k_hw_cal_data *caldata = ah->caldata;
 
         if (!caldata)
-                return ath9k_hw_get_default_nf(ah, chan);
+                return false;
 
         chan->channelFlags &= (~CHANNEL_CW_INT);
         if (REG_READ(ah, AR_PHY_AGC_CONTROL) & AR_PHY_AGC_CONTROL_NF) {
@@ -307,7 +309,7 @@ int16_t ath9k_hw_getnf(struct ath_hw *ah,
                           "NF did not complete in calibration window\n");
                 nf = 0;
                 caldata->rawNoiseFloor = nf;
-                return caldata->rawNoiseFloor;
+                return false;
         } else {
                 ath9k_hw_do_getnf(ah, nfarray);
                 ath9k_hw_nf_sanitize(ah, nfarray);
@@ -323,11 +325,10 @@ int16_t ath9k_hw_getnf(struct ath_hw *ah,
         }
 
         h = caldata->nfCalHist;
-
+        caldata->nfcal_pending = false;
         ath9k_hw_update_nfcal_hist_buffer(h, nfarray);
         caldata->rawNoiseFloor = h[0].privNF;
-
-        return ah->caldata->rawNoiseFloor;
+        return true;
 }
 
 void ath9k_init_nfcal_hist_buffer(struct ath_hw *ah,
diff --git a/drivers/net/wireless/ath/ath9k/calib.h b/drivers/net/wireless/ath/ath9k/calib.h
index ca2e6b39c1d4..0a304b3eeeb6 100644
--- a/drivers/net/wireless/ath/ath9k/calib.h
+++ b/drivers/net/wireless/ath/ath9k/calib.h
@@ -110,8 +110,7 @@ struct ath9k_pacal_info{
 bool ath9k_hw_reset_calvalid(struct ath_hw *ah);
 void ath9k_hw_start_nfcal(struct ath_hw *ah, bool update);
 void ath9k_hw_loadnf(struct ath_hw *ah, struct ath9k_channel *chan);
-int16_t ath9k_hw_getnf(struct ath_hw *ah,
-                       struct ath9k_channel *chan);
+bool ath9k_hw_getnf(struct ath_hw *ah, struct ath9k_channel *chan);
 void ath9k_init_nfcal_hist_buffer(struct ath_hw *ah,
                                   struct ath9k_channel *chan);
 s16 ath9k_hw_getchan_noise(struct ath_hw *ah, struct ath9k_channel *chan);
diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h
index c1b701119d88..399f7c1283cd 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -354,6 +354,7 @@ struct ath9k_hw_cal_data {
         int8_t qCoff;
         int16_t rawNoiseFloor;
         bool paprd_done;
+        bool nfcal_pending;
         u16 small_signal_gain[AR9300_MAX_CHAINS];
         u32 pa_table[AR9300_MAX_CHAINS][PAPRD_TABLE_SZ];
         struct ath9k_nfcal_hist nfCalHist[NUM_NF_READINGS];