After a full chip reset, mac80211 reconfig replays interface, link and channel context setup. mt7996_vif_link_add() short-circuits when the link_id is still marked in mvif->valid_links, a state introduced for postponing link teardown to interface removal. The reset path frees the link structures without clearing those bits, so the replayed setup never re-creates dev_info/bss_info/STA records in the restarted firmware and never re-registers the link wcid, leaving the device inoperative. The reset path also leaks every allocated MLD index: per-link indices and the per-vif group/remap indices are re-allocated from scratch during reconfig, but the old bits stay set in the masks, so repeated full resets exhaust the index space. Clear valid_links in the reset vif iterator and reset the MLD index masks alongside the existing omac_mask clearing. Fixes: ace5d3b6b49e ("wifi: mt76: mt7996: improve hardware restart reliability") Fixes: 08813703ac41 ("wifi: mt76: mt7996: Destroy vif active links in mt7996_remove_interface()") Signed-off-by: Felix Fietkau --- drivers/net/wireless/mediatek/mt76/mt7996/mac.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/mac.c b/drivers/net/wireless/mediatek/mt76/mt7996/mac.c index ce8c5a5ea8cc..4794dacb3756 100644 --- a/drivers/net/wireless/mediatek/mt76/mt7996/mac.c +++ b/drivers/net/wireless/mediatek/mt76/mt7996/mac.c @@ -2449,6 +2449,7 @@ mt7996_mac_reset_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif) rcu_assign_pointer(mvif->link[i], NULL); kfree_rcu(mlink, rcu_head); } + mvif->valid_links = 0; rcu_read_unlock(); } @@ -2483,6 +2484,8 @@ mt7996_mac_full_reset(struct mt7996_dev *dev) mt7996_for_each_phy(dev, phy) phy->omac_mask = 0; + dev->mld_idx_mask = 0; + dev->mld_remap_idx_mask = 0; ieee80211_iterate_stations_atomic(hw, mt7996_mac_reset_sta_iter, dev); mt76_reset_device(&dev->mt76); -- 2.53.0