ath9k: add noise floor calibration fix that should improve stability

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@26819 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/package/mac80211/patches/300-pending_work.patch b/package/mac80211/patches/300-pending_work.patch
index d4a2f4e..f06e9df 100644 (file)
--- a/package/mac80211/patches/300-pending_work.patch
+++ b/package/mac80211/patches/300-pending_work.patch
@@ -565,3 +565,55 @@
                          HT_RX_REORDER_BUF_TIMEOUT);
        } else {
                del_timer(&tid_agg_rx->reorder_timer);
+--- 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_b
+                                             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, 
+       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, 
+               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, 
+       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);