minstrel_ht: fix updating rate with best probability

The throughput should be considered when updating rate
with best probability.
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Acked-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

net/mac80211/rc80211_minstrel_ht.c

@@ -240,6 +240,7 @@ minstrel_ht_update_stats(struct minstrel_priv *mp, struct minstrel_ht_sta *mi)
 			     MINSTREL_FRAC(3, 4)) || mr->probability > cur_prob) {
 				mg->max_prob_rate = index;
 				cur_prob = mr->probability;
+				cur_prob_tp = mr->cur_tp;
 			}
 
 			if (mr->cur_tp > cur_tp) {
@@ -275,6 +276,7 @@ minstrel_ht_update_stats(struct minstrel_priv *mp, struct minstrel_ht_sta *mi)
 		    minstrel_mcs_groups[group].streams == 1) {
 			mi->max_prob_rate = mg->max_prob_rate;
 			cur_prob = mr->cur_prob;
+			cur_prob_tp = mr->cur_tp;
 		}
 
 		mr = minstrel_get_ratestats(mi, mg->max_tp_rate);