1 files changed, 24 insertions, 6 deletions

diff --git a/net/mac80211/rc80211_minstrel.c b/net/mac80211/rc80211_minstrel.c
index 5b25966add10..a507376d5316 100644
--- a/net/mac80211/rc80211_minstrel.c
+++ b/net/mac80211/rc80211_minstrel.c
@@ -382,14 +382,18 @@ minstrel_get_rate(void *priv, struct ieee80211_sta *sta,
 static void
 calc_rate_durations(enum ieee80211_band band,
 		    struct minstrel_rate *d,
-		    struct ieee80211_rate *rate)
+		    struct ieee80211_rate *rate,
+		    struct cfg80211_chan_def *chandef)
 {
 	int erp = !!(rate->flags & IEEE80211_RATE_ERP_G);
+	int shift = ieee80211_chandef_get_shift(chandef);
 
 	d->perfect_tx_time = ieee80211_frame_duration(band, 1200,
-			rate->bitrate, erp, 1);
+			DIV_ROUND_UP(rate->bitrate, 1 << shift), erp, 1,
+			shift);
 	d->ack_time = ieee80211_frame_duration(band, 10,
-			rate->bitrate, erp, 1);
+			DIV_ROUND_UP(rate->bitrate, 1 << shift), erp, 1,
+			shift);
 }
 
 static void
@@ -425,14 +429,17 @@ minstrel_rate_init(void *priv, struct ieee80211_supported_band *sband,
 	struct ieee80211_rate *ctl_rate;
 	unsigned int i, n = 0;
 	unsigned int t_slot = 9; /* FIXME: get real slot time */
+	u32 rate_flags;
 
 	mi->sta = sta;
 	mi->lowest_rix = rate_lowest_index(sband, sta);
 	ctl_rate = &sband->bitrates[mi->lowest_rix];
 	mi->sp_ack_dur = ieee80211_frame_duration(sband->band, 10,
 				ctl_rate->bitrate,
-				!!(ctl_rate->flags & IEEE80211_RATE_ERP_G), 1);
+				!!(ctl_rate->flags & IEEE80211_RATE_ERP_G), 1,
+				ieee80211_chandef_get_shift(chandef));
 
+	rate_flags = ieee80211_chandef_rate_flags(&mp->hw->conf.chandef);
 	memset(mi->max_tp_rate, 0, sizeof(mi->max_tp_rate));
 	mi->max_prob_rate = 0;
 
@@ -441,15 +448,22 @@ minstrel_rate_init(void *priv, struct ieee80211_supported_band *sband,
 		unsigned int tx_time = 0, tx_time_cts = 0, tx_time_rtscts = 0;
 		unsigned int tx_time_single;
 		unsigned int cw = mp->cw_min;
+		int shift;
 
 		if (!rate_supported(sta, sband->band, i))
 			continue;
+		if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
+			continue;
+
 		n++;
 		memset(mr, 0, sizeof(*mr));
 
 		mr->rix = i;
-		mr->bitrate = sband->bitrates[i].bitrate / 5;
-		calc_rate_durations(sband->band, mr, &sband->bitrates[i]);
+		shift = ieee80211_chandef_get_shift(chandef);
+		mr->bitrate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
+					   (1 << shift) * 5);
+		calc_rate_durations(sband->band, mr, &sband->bitrates[i],
+				    chandef);
 
 		/* calculate maximum number of retransmissions before
 		 * fallback (based on maximum segment size) */
@@ -547,6 +561,7 @@ minstrel_init_cck_rates(struct minstrel_priv *mp)
 {
 	static const int bitrates[4] = { 10, 20, 55, 110 };
 	struct ieee80211_supported_band *sband;
+	u32 rate_flags = ieee80211_chandef_rate_flags(&mp->hw->conf.chandef);
 	int i, j;
 
 	sband = mp->hw->wiphy->bands[IEEE80211_BAND_2GHZ];
@@ -559,6 +574,9 @@ minstrel_init_cck_rates(struct minstrel_priv *mp)
 		if (rate->flags & IEEE80211_RATE_ERP_G)
 			continue;
 
+		if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
+			continue;
+
 		for (j = 0; j < ARRAY_SIZE(bitrates); j++) {
 			if (rate->bitrate != bitrates[j])
 				continue;