mac80211: small rate control fix

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 38874

package/kernel/mac80211/patches/300-pending_work.patch

@@ -4751,3 +4751,14 @@
  	ath9k_cmn_update_ichannel(channel, chandef);
  
  	return channel;
+--- a/net/mac80211/rc80211_minstrel_ht.c
++++ b/net/mac80211/rc80211_minstrel_ht.c
+@@ -226,7 +226,7 @@ minstrel_ht_calc_tp(struct minstrel_ht_s
+ 		nsecs = 1000 * mi->overhead / MINSTREL_TRUNC(mi->avg_ampdu_len);
+ 
+ 	nsecs += minstrel_mcs_groups[group].duration[rate];
+-	tp = 1000000 * ((mr->probability * 1000) / nsecs);
++	tp = 1000000 * (prob * 1000) / nsecs;
+ 
+ 	mr->cur_tp = MINSTREL_TRUNC(tp);
+ }