mac80211: fix an RTS/CTS issue in minstrel_ht

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

SVN-Revision: 48759

package/kernel/mac80211/patches/337-mac80211-minstrel_ht-fix-a-logic-error-in-RTS-CTS-ha.patch

@@ -0,0 +1,26 @@
+From: Felix Fietkau <nbd@openwrt.org>
+Date: Wed, 24 Feb 2016 12:03:13 +0100
+Subject: [PATCH] mac80211: minstrel_ht: fix a logic error in RTS/CTS handling
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+RTS/CTS needs to be enabled if the rate is a fallback rate *or* if it's
+a dual-stream rate and the sta is in dynamic SMPS mode.
+
+Fixes: a3ebb4e1b763 ("mac80211: minstrel_ht: handle peers in dynamic SMPS")
+Reported-by: Matías Richart <mrichart@fing.edu.uy>
+Signed-off-by: Felix Fietkau <nbd@openwrt.org>
+---
+
+--- a/net/mac80211/rc80211_minstrel_ht.c
++++ b/net/mac80211/rc80211_minstrel_ht.c
+@@ -872,7 +872,7 @@ minstrel_ht_set_rate(struct minstrel_pri
+ 	 *  - if station is in dynamic SMPS (and streams > 1)
+ 	 *  - for fallback rates, to increase chances of getting through
+ 	 */
+-	if (offset > 0 &&
++	if (offset > 0 ||
+ 	    (mi->sta->smps_mode == IEEE80211_SMPS_DYNAMIC &&
+ 	     group->streams > 1)) {
+ 		ratetbl->rate[offset].count = ratetbl->rate[offset].count_rts;