mt76x02: disable HW encryption for group frames

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

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

diff --git a/drivers/net/wireless/mediatek/mt76/mt76x02_util.c b/drivers/net/wireless/mediatek/mt76/mt76x02_util.c
index 168c62a903616cfb50f521cf79833e0ef111cdd8..ed6463c9166eadd30e5edd07e8e4b55f327bfb0f 100644 (file)
--- 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;