mac80211: move txrate_idx into RC algorithms

The sta_info->txrate_idx member isn't used by all RC algorithms
in the way it was intended to be used, move it into those that
require it (only PID) and keep track in the core code of which
rate was last used for reporting to userspace and the mesh MLME.

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

3 files changed, 5 insertions, 19 deletions

diff --git a/drivers/net/wireless/ath9k/rc.c b/drivers/net/wireless/ath9k/rc.c
index 226d70c..1cc9daf 100644
--- a/drivers/net/wireless/ath9k/rc.c
+++ b/drivers/net/wireless/ath9k/rc.c
@@ -2039,7 +2039,6 @@ static void ath_rate_init(void *priv, void *priv_sta,
 	DPRINTF(sc, ATH_DBG_RATE, "%s\n", __func__);
 
 	sband = local->hw.wiphy->bands[local->hw.conf.channel->band];
-	sta->txrate_idx = rate_lowest_index(local, sband, sta);
 
 	ath_setup_rates(local, sta);
 	if (conf->flags & IEEE80211_CONF_SUPPORT_HT_MODE) {
diff --git a/drivers/net/wireless/iwlwifi/iwl-3945-rs.c b/drivers/net/wireless/iwlwifi/iwl-3945-rs.c
index f751b90..a279bf1 100644
--- a/drivers/net/wireless/iwlwifi/iwl-3945-rs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-3945-rs.c
@@ -334,13 +334,11 @@ static void rs_rate_init(void *priv_rate, void *priv_sta,
 
 	for (i = IWL_RATE_COUNT - 1; i >= 0; i--) {
 		if (sta->sta.supp_rates[local->hw.conf.channel->band] & (1 << i)) {
-			sta->txrate_idx = i;
+			rs_sta->last_txrate_idx = i;
 			break;
 		}
 	}
 
-	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)
 		rs_sta->last_txrate_idx += IWL_FIRST_OFDM_RATE;
@@ -809,15 +807,13 @@ static void rs_get_rate(void *priv_rate, struct net_device *dev,
 
 	rs_sta->last_txrate_idx = index;
 	if (sband->band == IEEE80211_BAND_5GHZ)
-		sta->txrate_idx = rs_sta->last_txrate_idx - IWL_FIRST_OFDM_RATE;
+		sel->rate_idx = rs_sta->last_txrate_idx - IWL_FIRST_OFDM_RATE;
 	else
-		sta->txrate_idx = rs_sta->last_txrate_idx;
+		sel->rate_idx = rs_sta->last_txrate_idx;
 
 	rcu_read_unlock();
 
 	IWL_DEBUG_RATE("leave: %d\n", index);
-
-	sel->rate_idx = sta->txrate_idx;
 }
 
 static struct rate_control_ops rs_ops = {
diff --git a/drivers/net/wireless/iwlwifi/iwl-agn-rs.c b/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
index f7191a9..a8711c3 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn-rs.c
@@ -2064,14 +2064,6 @@ out:
 	i = index;
 	lq_sta->last_txrate_idx = i;
 
-	/* sta->txrate_idx is an index to A mode rates which start
-	 * at IWL_FIRST_OFDM_RATE
-	 */
-	if (lq_sta->band == IEEE80211_BAND_5GHZ)
-		sta->txrate_idx = i - IWL_FIRST_OFDM_RATE;
-	else
-		sta->txrate_idx = i;
-
 	return;
 }
 
@@ -2234,7 +2226,6 @@ static void rs_rate_init(void *priv_rate, void *priv_sta,
 
 	lq_sta->flush_timer = 0;
 	lq_sta->supp_rates = sta->sta.supp_rates[sband->band];
-	sta->txrate_idx = 3;
 	for (j = 0; j < LQ_SIZE; j++)
 		for (i = 0; i < IWL_RATE_COUNT; i++)
 			rs_rate_scale_clear_window(&lq_sta->lq_info[j].win[i]);
@@ -2269,11 +2260,11 @@ static void rs_rate_init(void *priv_rate, void *priv_sta,
 	}
 
 	/* Find highest tx rate supported by hardware and destination station */
+	lq_sta->last_txrate_idx = 3;
 	for (i = 0; i < sband->n_bitrates; i++)
 		if (sta->sta.supp_rates[sband->band] & BIT(i))
-			sta->txrate_idx = i;
+			lq_sta->last_txrate_idx = i;
 
-	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)
 		lq_sta->last_txrate_idx += IWL_FIRST_OFDM_RATE;