1 files changed, 13 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath9k/calib.c b/drivers/net/wireless/ath/ath9k/calib.c
index 8649581fa4dd..fe3c10e6b276 100644
--- a/drivers/net/wireless/ath/ath9k/calib.c
+++ b/drivers/net/wireless/ath/ath9k/calib.c
@@ -69,15 +69,21 @@ static void ath9k_hw_update_nfcal_hist_buffer(struct ath_hw *ah,
                                               int16_t *nfarray)
 {
         struct ath_common *common = ath9k_hw_common(ah);
+        struct ieee80211_conf *conf = &common->hw->conf;
         struct ath_nf_limits *limit;
         struct ath9k_nfcal_hist *h;
         bool high_nf_mid = false;
+        u8 chainmask = (ah->rxchainmask << 3) | ah->rxchainmask;
         int i;
 
         h = cal->nfCalHist;
         limit = ath9k_hw_get_nf_limits(ah, ah->curchan);
 
         for (i = 0; i < NUM_NF_READINGS; i++) {
+                if (!(chainmask & (1 << i)) ||
+                    ((i >= AR5416_MAX_CHAINS) && !conf_is_ht40(conf)))
+                        continue;
+
                 h[i].nfCalBuffer[h[i].currIndex] = nfarray[i];
 
                 if (++h[i].currIndex >= ATH9K_NF_CAL_HIST_MAX)
@@ -225,6 +231,7 @@ void ath9k_hw_loadnf(struct ath_hw *ah, struct ath9k_channel *chan)
         int32_t val;
         u8 chainmask = (ah->rxchainmask << 3) | ah->rxchainmask;
         struct ath_common *common = ath9k_hw_common(ah);
+        struct ieee80211_conf *conf = &common->hw->conf;
         s16 default_nf = ath9k_hw_get_default_nf(ah, chan);
 
         if (ah->caldata)
@@ -234,6 +241,9 @@ void ath9k_hw_loadnf(struct ath_hw *ah, struct ath9k_channel *chan)
                 if (chainmask & (1 << i)) {
                         s16 nfval;
 
+                        if ((i >= AR5416_MAX_CHAINS) && !conf_is_ht40(conf))
+                                continue;
+
                         if (h)
                                 nfval = h[i].privNF;
                         else
@@ -293,6 +303,9 @@ void ath9k_hw_loadnf(struct ath_hw *ah, struct ath9k_channel *chan)
         ENABLE_REGWRITE_BUFFER(ah);
         for (i = 0; i < NUM_NF_READINGS; i++) {
                 if (chainmask & (1 << i)) {
+                        if ((i >= AR5416_MAX_CHAINS) && !conf_is_ht40(conf))
+                                continue;
+
                         val = REG_READ(ah, ah->nf_regs[i]);
                         val &= 0xFFFFFE00;
                         val |= (((u32) (-50) << 1) & 0x1ff);