mac80211: TDLS: always downgrade invalid chandefs

Even if the current chandef width is equal to the station's max-BW, it
doesn't mean it's a valid width for TDLS. Make sure to always check
regulatory constraints in these cases.

Fixes: 0fabfaafec3a ("mac80211: upgrade BW of TDLS peers when possible")
Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/tdls.c b/net/mac80211/tdls.c
index c9eeb3f1280852b6ec1c44eb82755390cf959629..43f13abe89c753909b46102af6b31f586065a49c 100644 (file)
--- a/net/mac80211/tdls.c
+++ b/net/mac80211/tdls.c
@@ -332,7 +332,7 @@ ieee80211_tdls_chandef_vht_upgrade(struct ieee80211_sub_if_data *sdata,
                return;
 
        /* proceed to downgrade the chandef until usable or the same */
-       while (uc.width > max_width &&
+       while (uc.width > max_width ||
               !cfg80211_reg_can_beacon_relax(sdata->local->hw.wiphy, &uc,
                                              sdata->wdev.iftype))
                ieee80211_chandef_downgrade(&uc);