ath9k: remove sc->cur_rate_table and sc->cur_rate_mode

Set the rate table in the rc module properly based on band and
HT capabilities instead, which was already partially done, but
not for every mode.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath9k/ath9k.h

@@ -623,8 +623,6 @@ struct ath_softc {
 	struct ath_rx rx;
 	struct ath_tx tx;
 	struct ath_beacon beacon;
-	const struct ath_rate_table *cur_rate_table;
-	enum wireless_mode cur_rate_mode;
 	struct ieee80211_supported_band sbands[IEEE80211_NUM_BANDS];
 
 	struct ath_led radio_led;

drivers/net/wireless/ath/ath9k/main.c

@@ -18,36 +18,6 @@
 #include "ath9k.h"
 #include "btcoex.h"
 
-static void ath_cache_conf_rate(struct ath_softc *sc,
-				struct ieee80211_conf *conf)
-{
-	switch (conf->channel->band) {
-	case IEEE80211_BAND_2GHZ:
-		if (conf_is_ht20(conf))
-			sc->cur_rate_mode = ATH9K_MODE_11NG_HT20;
-		else if (conf_is_ht40_minus(conf))
-			sc->cur_rate_mode = ATH9K_MODE_11NG_HT40MINUS;
-		else if (conf_is_ht40_plus(conf))
-			sc->cur_rate_mode = ATH9K_MODE_11NG_HT40PLUS;
-		else
-			sc->cur_rate_mode = ATH9K_MODE_11G;
-		break;
-	case IEEE80211_BAND_5GHZ:
-		if (conf_is_ht20(conf))
-			sc->cur_rate_mode = ATH9K_MODE_11NA_HT20;
-		else if (conf_is_ht40_minus(conf))
-			sc->cur_rate_mode = ATH9K_MODE_11NA_HT40MINUS;
-		else if (conf_is_ht40_plus(conf))
-			sc->cur_rate_mode = ATH9K_MODE_11NA_HT40PLUS;
-		else
-			sc->cur_rate_mode = ATH9K_MODE_11A;
-		break;
-	default:
-		BUG_ON(1);
-		break;
-	}
-}
-
 static void ath_update_txpow(struct ath_softc *sc)
 {
 	struct ath_hw *ah = sc->sc_ah;
@@ -306,7 +276,6 @@ int ath_set_channel(struct ath_softc *sc, struct ieee80211_hw *hw,
 		goto ps_restore;
 	}
 
-	ath_cache_conf_rate(sc, &hw->conf);
 	ath_update_txpow(sc);
 	ath9k_hw_set_interrupts(ah, ah->imask);
 
@@ -1013,8 +982,6 @@ int ath_reset(struct ath_softc *sc, bool retry_tx)
 	 * that changes the channel so update any state that
 	 * might change as a result.
 	 */
-	ath_cache_conf_rate(sc, &hw->conf);
-
 	ath_update_txpow(sc);
 
 	if ((sc->sc_flags & SC_OP_BEACONS) || !(sc->sc_flags & (SC_OP_OFFCHANNEL)))
@@ -1221,8 +1188,6 @@ static int ath9k_start(struct ieee80211_hw *hw)
 	if (ah->caps.hw_caps & ATH9K_HW_CAP_HT)
 		ah->imask |= ATH9K_INT_CST;
 
-	ath_cache_conf_rate(sc, &hw->conf);
-
 	sc->sc_flags &= ~SC_OP_INVALID;
 
 	/* Disable BMISS interrupt when we're not associated */

drivers/net/wireless/ath/ath9k/rc.c

@@ -791,7 +791,7 @@ static void ath_get_rate(void *priv, struct ieee80211_sta *sta, void *priv_sta,
 	 */
 	try_per_rate = 4;
 
-	rate_table = sc->cur_rate_table;
+	rate_table = ath_rc_priv->rate_table;
 	rix = ath_rc_get_highest_rix(sc, ath_rc_priv, rate_table, &is_probe);
 
 	/*
@@ -1048,7 +1048,7 @@ static void ath_rc_update_ht(struct ath_softc *sc,
 	int rate;
 	u8 last_per;
 	bool state_change = false;
-	const struct ath_rate_table *rate_table = sc->cur_rate_table;
+	const struct ath_rate_table *rate_table = ath_rc_priv->rate_table;
 	int size = ath_rc_priv->rate_table_size;
 
 	if ((tx_rate < 0) || (tx_rate > rate_table->rate_cnt))
@@ -1150,7 +1150,7 @@ static void ath_rc_tx_status(struct ath_softc *sc,
 	u8 flags;
 	u32 i = 0, rix;
 
-	rate_table = sc->cur_rate_table;
+	rate_table = ath_rc_priv->rate_table;
 
 	/*
 	 * If the first rate is not the final index, there
@@ -1231,7 +1231,6 @@ struct ath_rate_table *ath_choose_rate_table(struct ath_softc *sc,
 	ath_print(common, ATH_DBG_CONFIG,
 		  "Choosing rate table for mode: %d\n", mode);
 
-	sc->cur_rate_mode = mode;
 	return hw_rate_table[mode];
 }
 
@@ -1303,7 +1302,6 @@ static void ath_rc_init(struct ath_softc *sc,
 	ath_rc_priv->max_valid_rate = k;
 	ath_rc_sort_validrates(rate_table, ath_rc_priv);
 	ath_rc_priv->rate_max_phy = ath_rc_priv->valid_rate_index[k-4];
-	sc->cur_rate_table = rate_table;
 	ath_rc_priv->rate_table = rate_table;
 
 	ath_print(common, ATH_DBG_CONFIG,
@@ -1439,8 +1437,9 @@ static void ath_tx_status(void *priv, struct ieee80211_supported_band *sband,
 		}
 	}
 
-	ath_debug_stat_rc(ath_rc_priv, ath_rc_get_rateindex(sc->cur_rate_table,
-		&tx_info->status.rates[final_ts_idx]));
+	ath_debug_stat_rc(ath_rc_priv,
+		ath_rc_get_rateindex(ath_rc_priv->rate_table,
+			&tx_info->status.rates[final_ts_idx]));
 }
 
 static void ath_rate_init(void *priv, struct ieee80211_supported_band *sband,
@@ -1480,14 +1479,8 @@ static void ath_rate_init(void *priv, struct ieee80211_supported_band *sband,
 
 	/* Choose rate table first */
 
-	if ((sc->sc_ah->opmode == NL80211_IFTYPE_STATION) ||
-	    (sc->sc_ah->opmode == NL80211_IFTYPE_MESH_POINT) ||
-	    (sc->sc_ah->opmode == NL80211_IFTYPE_ADHOC)) {
-		rate_table = ath_choose_rate_table(sc, sband->band,
-		                      sta->ht_cap.ht_supported, is_cw40);
-	} else {
-		rate_table = hw_rate_table[sc->cur_rate_mode];
-	}
+	rate_table = ath_choose_rate_table(sc, sband->band,
+	                      sta->ht_cap.ht_supported, is_cw40);
 
 	ath_rc_priv->ht_cap = ath_rc_build_ht_caps(sc, sta, is_cw40, is_sgi);
 	ath_rc_init(sc, priv_sta, sband, sta, rate_table);
@@ -1536,7 +1529,6 @@ static void ath_rate_update(void *priv, struct ieee80211_supported_band *sband,
 			ath_print(ath9k_hw_common(sc->sc_ah), ATH_DBG_CONFIG,
 				  "Operating HT Bandwidth changed to: %d\n",
 				  sc->hw->conf.channel_type);
-			sc->cur_rate_table = hw_rate_table[sc->cur_rate_mode];
 		}
 	}
 }