ath9k: Cleanup index retrieval routines

Trim API and remove unused variables.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/ath/ath9k/rc.c b/drivers/net/wireless/ath/ath9k/rc.c
index 69745ad..2e517c0 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/rc.c
+++ b/drivers/net/wireless/ath/ath9k/rc.c
@@ -471,8 +471,7 @@ static int ath_rc_valid_phyrate(u32 phy, u32 capflag, int ignore_cw)
 }
 
 static inline int
-ath_rc_get_lower_rix(const struct ath_rate_table *rate_table,
-                    struct ath_rate_priv *ath_rc_priv,
+ath_rc_get_lower_rix(struct ath_rate_priv *ath_rc_priv,
                     u8 cur_valid_txrate, u8 *next_idx)
 {
        int8_t i;
@@ -582,13 +581,11 @@ static u8 ath_rc_setvalid_htrates(struct ath_rate_priv *ath_rc_priv)
        return hi;
 }
 
-/* Finds the highest rate index we can use */
-static u8 ath_rc_get_highest_rix(struct ath_softc *sc,
-                                struct ath_rate_priv *ath_rc_priv,
-                                const struct ath_rate_table *rate_table,
+static u8 ath_rc_get_highest_rix(struct ath_rate_priv *ath_rc_priv,
                                 int *is_probing,
                                 bool legacy)
 {
+       const struct ath_rate_table *rate_table = ath_rc_priv->rate_table;
        u32 best_thruput, this_thruput, now_msec;
        u8 rate, next_rate, best_rate, maxindex, minindex;
        int8_t index = 0;
@@ -773,14 +770,8 @@ static void ath_get_rate(void *priv, struct ieee80211_sta *sta, void *priv_sta,
        try_per_rate = 4;
 
        rate_table = ath_rc_priv->rate_table;
-       rix = ath_rc_get_highest_rix(sc, ath_rc_priv, rate_table,
-                                    &is_probe, false);
+       rix = ath_rc_get_highest_rix(ath_rc_priv, &is_probe, false);
 
-       /*
-        * If we're in HT mode and both us and our peer supports LDPC.
-        * We don't need to check our own device's capabilities as our own
-        * ht capabilities would have already been intersected with our peer's.
-        */
        if (conf_is_ht(&sc->hw->conf) &&
            (sta->ht_cap.cap & IEEE80211_HT_CAP_LDPC_CODING))
                tx_info->flags |= IEEE80211_TX_CTL_LDPC;
@@ -790,35 +781,42 @@ static void ath_get_rate(void *priv, struct ieee80211_sta *sta, void *priv_sta,
                tx_info->flags |= (1 << IEEE80211_TX_CTL_STBC_SHIFT);
 
        if (is_probe) {
-               /* set one try for probe rates. For the
-                * probes don't enable rts */
+               /*
+                * Set one try for probe rates. For the
+                * probes don't enable RTS.
+                */
                ath_rc_rate_set_series(rate_table, &rates[i++], txrc,
                                       1, rix, 0);
-
-               /* Get the next tried/allowed rate. No RTS for the next series
-                * after the probe rate
+               /*
+                * Get the next tried/allowed rate.
+                * No RTS for the next series after the probe rate.
                 */
-               ath_rc_get_lower_rix(rate_table, ath_rc_priv, rix, &rix);
+               ath_rc_get_lower_rix(ath_rc_priv, rix, &rix);
                ath_rc_rate_set_series(rate_table, &rates[i++], txrc,
                                       try_per_rate, rix, 0);
 
                tx_info->flags |= IEEE80211_TX_CTL_RATE_CTRL_PROBE;
        } else {
-               /* Set the chosen rate. No RTS for first series entry. */
+               /*
+                * Set the chosen rate. No RTS for first series entry.
+                */
                ath_rc_rate_set_series(rate_table, &rates[i++], txrc,
                                       try_per_rate, rix, 0);
        }
 
-       /* Fill in the other rates for multirate retry */
        for ( ; i < 3; i++) {
+               ath_rc_get_lower_rix(ath_rc_priv, rix, &rix);
 
-               ath_rc_get_lower_rix(rate_table, ath_rc_priv, rix, &rix);
-               /* All other rates in the series have RTS enabled */
+               /*
+                * All other rates in the series have RTS enabled.
+                */
                ath_rc_rate_set_series(rate_table, &rates[i], txrc,
                                       try_per_rate, rix, 1);
        }
 
-       /* Use twice the number of tries for the last MRR segment. */
+       /*
+        * Use twice the number of tries for the last MRR segment.
+        */
        try_per_rate = 8;
 
        /*
@@ -827,11 +825,11 @@ static void ath_get_rate(void *priv, struct ieee80211_sta *sta, void *priv_sta,
         * as last retry to ensure that the frame is tried in both
         * MCS and legacy rate.
         */
-       ath_rc_get_lower_rix(rate_table, ath_rc_priv, rix, &rix);
+       ath_rc_get_lower_rix(ath_rc_priv, rix, &rix);
+
        if (WLAN_RC_PHY_HT(rate_table->info[rix].phy) &&
            (ath_rc_priv->per[rix] > 45))
-               rix = ath_rc_get_highest_rix(sc, ath_rc_priv, rate_table,
-                               &is_probe, true);
+               rix = ath_rc_get_highest_rix(ath_rc_priv, &is_probe, true);
 
        /* All other rates in the series have RTS enabled */
        ath_rc_rate_set_series(rate_table, &rates[i], txrc,
@@ -1061,8 +1059,8 @@ static void ath_rc_update_ht(struct ath_softc *sc,
        if (ath_rc_priv->per[tx_rate] >= 55 && tx_rate > 0 &&
            rate_table->info[tx_rate].ratekbps <=
            rate_table->info[ath_rc_priv->rate_max_phy].ratekbps) {
-               ath_rc_get_lower_rix(rate_table, ath_rc_priv,
-                                    (u8)tx_rate, &ath_rc_priv->rate_max_phy);
+               ath_rc_get_lower_rix(ath_rc_priv, (u8)tx_rate,
+                                    &ath_rc_priv->rate_max_phy);
 
                /* Don't probe for a little while. */
                ath_rc_priv->probe_time = now_msec;