mac80211: fix cck rate sampling in minstrel_ht

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

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@37078 3c298f89-4303-0410-b956-a3cf2f4a3e73

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

@@ -332,3 +332,25 @@
  			chip_reset = true;
  
  		mutex_unlock(&priv->htc_pm_lock);
+--- a/net/mac80211/rc80211_minstrel_ht.c
++++ b/net/mac80211/rc80211_minstrel_ht.c
+@@ -804,10 +804,18 @@ minstrel_ht_get_rate(void *priv, struct 
+ 
+ 	sample_group = &minstrel_mcs_groups[sample_idx / MCS_GROUP_RATES];
+ 	info->flags |= IEEE80211_TX_CTL_RATE_CTRL_PROBE;
++	rate->count = 1;
++
++	if (sample_idx / MCS_GROUP_RATES == MINSTREL_CCK_GROUP) {
++		int idx = sample_idx % ARRAY_SIZE(mp->cck_rates);
++		rate->idx = mp->cck_rates[idx];
++		rate->flags = 0;
++		return;
++	}
++
+ 	rate->idx = sample_idx % MCS_GROUP_RATES +
+ 		    (sample_group->streams - 1) * MCS_GROUP_RATES;
+ 	rate->flags = IEEE80211_TX_RC_MCS | sample_group->flags;
+-	rate->count = 1;
+ }
+ 
+ static void