mac80211: Don't use EAPOL frames for rate sampling

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Acked-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

net/mac80211/rc80211_minstrel_ht.c

@@ -608,7 +608,13 @@ minstrel_ht_get_rate(void *priv, struct ieee80211_sta *sta, void *priv_sta,
 		return mac80211_minstrel.get_rate(priv, sta, &msp->legacy, txrc);
 
 	info->flags |= mi->tx_flags;
-	sample_idx = minstrel_get_sample_rate(mp, mi);
+
+	/* Don't use EAPOL frames for sampling on non-mrr hw */
+	if (mp->hw->max_rates == 1 &&
+	    txrc->skb->protocol == cpu_to_be16(ETH_P_PAE))
+		sample_idx = -1;
+	else
+		sample_idx = minstrel_get_sample_rate(mp, mi);
 
 #ifdef CONFIG_MAC80211_DEBUGFS
 	/* use fixed index if set */