[PATCH mt76-next 09/29] wifi: mt76: mt7996: don't leak MLD group index on remap alloc failure

[Felix Fietkau <nbd@nbd.name>]

mt7996_change_vif_links() sets the mld_idx_mask group bit before
allocating the remap index. If the remap allocation fails it jumped to
the exit without clearing that bit, permanently consuming one of the 16
MLD group slots. Release the group bit on the error path.

Fixes: 4fb3b4e7d1ca ("wifi: mt76: mt7996: fix MLD group index assignment")
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
 drivers/net/wireless/mediatek/mt76/mt7996/main.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/main.c b/drivers/net/wireless/mediatek/mt76/mt7996/main.c
index 2487b00c3790..57afe4e81666 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7996/main.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7996/main.c
@@ -2458,6 +2458,7 @@ mt7996_change_vif_links(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 
 		idx = get_free_idx(dev->mld_remap_idx_mask, 0, 15) - 1;
 		if (idx < 0) {
+			dev->mld_idx_mask &= ~BIT_ULL(mvif->mld_group_idx);
 			ret = -ENOSPC;
 			goto out;
 		}
-- 
2.53.0