This is required to sent multicast/broadcast frames in USB AP
mode just after beacon.

Signed-off-by: Stanislaw Gruszka <[email protected]>
---
 drivers/net/wireless/mediatek/mt76/mt76x02_util.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/net/wireless/mediatek/mt76/mt76x02_util.c 
b/drivers/net/wireless/mediatek/mt76/mt76x02_util.c
index 168c62a90361..ed6463c9166e 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76x02_util.c
+++ b/drivers/net/wireless/mediatek/mt76/mt76x02_util.c
@@ -424,6 +424,16 @@ int mt76x02_set_key(struct ieee80211_hw *hw, enum 
set_key_cmd cmd,
            !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
                return -EOPNOTSUPP;
 
+       /*
+        * In USB AP mode, broadcast/multicast frames are setup in beacon
+        * data registers and sent via HW beacons engine, they require to
+        * be already encrypted.
+        */
+       if (mt76_is_usb(dev) &&
+           vif->type == NL80211_IFTYPE_AP &&
+           !(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
+               return -EOPNOTSUPP;
+
        msta = sta ? (struct mt76x02_sta *) sta->drv_priv : NULL;
        wcid = msta ? &msta->wcid : &mvif->group_wcid;
 
-- 
1.9.3

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