From c383e5c8ac5dd20b1c688cf3ef4d43a8be5483c9 Mon Sep 17 00:00:00 2001
From: Adrian Chadd <adrian@FreeBSD.org>
Date: Wed, 6 Apr 2016 00:52:30 +0000
Subject: [PATCH] [urtwn] disable doing AMPDU TX.

We don't do AMPDU TX for now, so don't bother setting this.
---
 sys/dev/urtwn/if_urtwn.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sys/dev/urtwn/if_urtwn.c b/sys/dev/urtwn/if_urtwn.c
index ff8e5167bc24..53ff96579922 100644
--- a/sys/dev/urtwn/if_urtwn.c
+++ b/sys/dev/urtwn/if_urtwn.c
@@ -593,7 +593,9 @@ urtwn_attach(device_t self)
 	if (urtwn_enable_11n) {
 		device_printf(self, "enabling 11n\n");
 		ic->ic_htcaps = IEEE80211_HTC_HT |
+#if 0
 		    IEEE80211_HTC_AMPDU |
+#endif
 		    IEEE80211_HTC_AMSDU |
 		    IEEE80211_HTCAP_MAXAMSDU_3839 |
 		    IEEE80211_HTCAP_SMPS_OFF;