mac80211: fix managed mode channel context use

My commit 8aea1c1b1262785a85ed9c20af17f2304e023b79
("mac80211: support VHT association") introduced a
very stupid bug: the loop to downgrade the channel
width never attempted to actually use it again so
it would downgrade all the way to 20_NOHT. Fix it.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index a3552929a21d68f469696c4131ffb6296becd5df..3b9cb510aa364349daa9a83d462bdb0d726096a7 100644 (file)
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -3529,8 +3529,11 @@ static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
         */
        ret = ieee80211_vif_use_channel(sdata, &chandef,
                                        IEEE80211_CHANCTX_SHARED);
-       while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT)
+       while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
                ifmgd->flags |= chandef_downgrade(&chandef);
+               ret = ieee80211_vif_use_channel(sdata, &chandef,
+                                               IEEE80211_CHANCTX_SHARED);
+       }
        return ret;
 }