[PATCH mt76-next 07/27] wifi: mt76: mt7996: upload only the keys of the link being set up

[Felix Fietkau <nbd@nbd.name>]

mt7996_vif_link_add() and mt7996_vif_link_destroy() walk the vif keys
through mt7996_key_iter(), which passes every group key to
mt7996_set_hw_key() for the link being set up. On an MLD interface each
group key belongs to one link, as key->link_id says, so a new link gets
the GTK and BIGTK of the other links written to its group WTBL entry,
and its hw_key_idx set to their key index.

Skip keys that belong to a different link, as mt7996_set_key() already
does for keys that mac80211 installs.

Fixes: eddc7286f6bb ("wifi: mt76: mt7996: fix key add/remove imbalance")
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
 drivers/net/wireless/mediatek/mt76/mt7996/main.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/main.c b/drivers/net/wireless/mediatek/mt76/mt7996/main.c
index e5f74f23d469..e74254928578 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7996/main.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7996/main.c
@@ -291,6 +291,9 @@ mt7996_key_iter(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 	if (sta)
 		return;
 
+	if (key->link_id >= 0 && key->link_id != it->link_id)
+		return;
+
 	WARN_ON(mt7996_set_hw_key(hw, it->cmd, vif, NULL, it->link_id, key));
 }
 
-- 
2.47.3