mac80211: move last_txrate_idx into RC algorithms

This variable in sta_info is only used in a meaningful way
by the Intel RC algorithms, so move it into those.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

2 files changed, 21 insertions, 14 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-3945-rs.c b/drivers/net/wireless/iwlwifi/iwl-3945-rs.c
index da23c927380f..46b672c34585 100644
--- a/drivers/net/wireless/iwlwifi/iwl-3945-rs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-3945-rs.c
@@ -65,6 +65,9 @@ struct iwl3945_rs_sta {
         u8 ibss_sta_added;
         struct timer_list rate_scale_flush;
         struct iwl3945_rate_scale_data win[IWL_RATE_COUNT];
+
+        /* used to be in sta_info */
+        int last_txrate_idx;
 };
 
 static s32 iwl3945_expected_tpt_g[IWL_RATE_COUNT] = {
@@ -319,6 +322,7 @@ static void iwl3945_collect_tx_data(struct iwl3945_rs_sta *rs_sta,
 static void rs_rate_init(void *priv_rate, void *priv_sta,
                          struct ieee80211_local *local, struct sta_info *sta)
 {
+        struct iwl3945_rs_sta *rs_sta = (void *)sta->rate_ctrl_priv;
         int i;
 
         IWL_DEBUG_RATE("enter\n");
@@ -335,11 +339,11 @@ static void rs_rate_init(void *priv_rate, void *priv_sta,
                 }
         }
 
-        sta->last_txrate_idx = sta->txrate_idx;
+        rs_sta->last_txrate_idx = sta->txrate_idx;
 
         /* For 5 GHz band it start at IWL_FIRST_OFDM_RATE */
         if (local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
-                sta->last_txrate_idx += IWL_FIRST_OFDM_RATE;
+                rs_sta->last_txrate_idx += IWL_FIRST_OFDM_RATE;
 
         IWL_DEBUG_RATE("leave\n");
 }
@@ -674,14 +678,14 @@ static void rs_get_rate(void *priv_rate, struct net_device *dev,
                 return;
         }
 
+        rs_sta = (void *)sta->rate_ctrl_priv;
+
         rate_mask = sta->supp_rates[sband->band];
-        index = min(sta->last_txrate_idx & 0xffff, IWL_RATE_COUNT - 1);
+        index = min(rs_sta->last_txrate_idx & 0xffff, IWL_RATE_COUNT - 1);
 
         if (sband->band == IEEE80211_BAND_5GHZ)
                 rate_mask = rate_mask << IWL_FIRST_OFDM_RATE;
 
-        rs_sta = (void *)sta->rate_ctrl_priv;
-
         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) &&
             !rs_sta->ibss_sta_added) {
                 u8 sta_id = iwl3945_hw_find_station(priv, hdr->addr1);
@@ -803,11 +807,11 @@ static void rs_get_rate(void *priv_rate, struct net_device *dev,
 
  out:
 
-        sta->last_txrate_idx = index;
+        rs_sta->last_txrate_idx = index;
         if (sband->band == IEEE80211_BAND_5GHZ)
-                sta->txrate_idx = sta->last_txrate_idx - IWL_FIRST_OFDM_RATE;
+                sta->txrate_idx = rs_sta->last_txrate_idx - IWL_FIRST_OFDM_RATE;
         else
-                sta->txrate_idx = sta->last_txrate_idx;
+                sta->txrate_idx = rs_sta->last_txrate_idx;
 
         rcu_read_unlock();
 
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-rs.c b/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
index af4e0b994e42..54f076bb2022 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
@@ -163,6 +163,9 @@ struct iwl_lq_sta {
         u32 dbg_fixed_rate;
 #endif
         struct iwl_priv *drv;
+
+        /* used to be in sta_info */
+        int last_txrate_idx;
 };
 
 static void rs_rate_scale_perform(struct iwl_priv *priv,
@@ -1746,7 +1749,7 @@ static void rs_rate_scale_perform(struct iwl_priv *priv,
         is_green = lq_sta->is_green;
 
         /* current tx rate */
-        index = sta->last_txrate_idx;
+        index = lq_sta->last_txrate_idx;
 
         IWL_DEBUG_RATE("Rate scale index %d for type %d\n", index,
                        tbl->lq_type);
@@ -2059,7 +2062,7 @@ lq_update:
 out:
         tbl->current_rate = rate_n_flags_from_tbl(tbl, index, is_green);
         i = index;
-        sta->last_txrate_idx = i;
+        lq_sta->last_txrate_idx = i;
 
         /* sta->txrate_idx is an index to A mode rates which start
          * at IWL_FIRST_OFDM_RATE
@@ -2090,7 +2093,7 @@ static void rs_initialize_lq(struct iwl_priv *priv,
                 goto out;
 
         lq_sta = (struct iwl_lq_sta *)sta->rate_ctrl_priv;
-        i = sta->last_txrate_idx;
+        i = lq_sta->last_txrate_idx;
 
         if ((lq_sta->lq.sta_id == 0xff) &&
             (priv->iw_mode == NL80211_IFTYPE_ADHOC))
@@ -2161,7 +2164,7 @@ static void rs_get_rate(void *priv_rate, struct net_device *dev,
         }
 
         lq_sta = (struct iwl_lq_sta *)sta->rate_ctrl_priv;
-        i = sta->last_txrate_idx;
+        i = lq_sta->last_txrate_idx;
 
         if ((priv->iw_mode == NL80211_IFTYPE_ADHOC) &&
             !lq_sta->ibss_sta_added) {
@@ -2270,10 +2273,10 @@ static void rs_rate_init(void *priv_rate, void *priv_sta,
                 if (sta->supp_rates[sband->band] & BIT(i))
                         sta->txrate_idx = i;
 
-        sta->last_txrate_idx = sta->txrate_idx;
+        lq_sta->last_txrate_idx = sta->txrate_idx;
         /* For MODE_IEEE80211A, skip over cck rates in global rate table */
         if (local->hw.conf.channel->band == IEEE80211_BAND_5GHZ)
-                sta->last_txrate_idx += IWL_FIRST_OFDM_RATE;
+                lq_sta->last_txrate_idx += IWL_FIRST_OFDM_RATE;
 
         lq_sta->is_dup = 0;
         lq_sta->is_green = rs_use_green(priv, conf);