(replying to myself, Tim responded off-list)
On Thu, 2014-02-27 at 18:58 +0100, Johannes Berg wrote:
> iw wlan0 interface add moni0 type monitor flags none
> ip link set moni0 up
> tcpdump -i moni0 -s 0 -w /tmp/assoc.pcap
Turns out I missed a quirk in the 11ac spec when implementing this - the
channel center frequency segment 0 is reserved when the channel width is
0 (use HT).
Try this change maybe:
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 46b62bb3677c..ca1f74bb5d50 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -222,6 +222,7 @@ ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
switch (vht_oper->chan_width) {
case IEEE80211_VHT_CHANWIDTH_USE_HT:
vht_chandef.width = chandef->width;
+ vht_chandef.center_freq1 = chandef->center_freq1;
break;
case IEEE80211_VHT_CHANWIDTH_80MHZ:
vht_chandef.width = NL80211_CHAN_WIDTH_80;
johannes
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