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List:       linux-wireless
Subject:    [PATCH 07/23] mac80211: check whether HE connection is allowed by the reg domain
From:       Luca Coelho <luca () coelho ! fi>
Date:       2020-01-31 11:12:44
Message-ID: 20200131111300.891737-8-luca () coelho ! fi
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From: Haim Dreyfuss <haim.dreyfuss@intel.com>

The wireless device might be capable to connect HE
as well as the AP. However, the regulatory domain might
forbid it. Check whether the regulatory domain allows HE connection
when considering if HE IE should be added.
Also, add it when setting our peer capability.

Signed-off-by: Haim Dreyfuss <haim.dreyfuss@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
---
 net/mac80211/mlme.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index f076e73314a6..152577cc2213 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -313,6 +313,10 @@ ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
 		ret |= ieee80211_chandef_downgrade(chandef);
 	}
 
+	if (!cfg80211_chandef_usable(sdata->wdev.wiphy, chandef,
+				     IEEE80211_CHAN_NO_HE))
+		ret |= IEEE80211_STA_DISABLE_HE;
+
 	if (chandef->width != vht_chandef.width && !tracking)
 		sdata_info(sdata,
 			   "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
@@ -622,10 +626,21 @@ static void ieee80211_add_he_ie(struct ieee80211_sub_if_data *sdata,
 {
 	u8 *pos;
 	const struct ieee80211_sta_he_cap *he_cap = NULL;
+	struct ieee80211_chanctx_conf *chanctx_conf;
 	u8 he_cap_size;
+	bool reg_cap = false;
+
+	rcu_read_lock();
+	chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
+	if (!WARN_ON_ONCE(!chanctx_conf))
+		reg_cap = cfg80211_chandef_usable(sdata->wdev.wiphy,
+						  &chanctx_conf->def,
+						  IEEE80211_CHAN_NO_HE);
+
+	rcu_read_unlock();
 
 	he_cap = ieee80211_get_he_sta_cap(sband);
-	if (!he_cap)
+	if (!he_cap || !reg_cap)
 		return;
 
 	/*
-- 
2.24.1

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