wifi: mt76: mt7996: clear stale link state on full reset

Browse source

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: ace5d3b6b4 ("wifi: mt76: mt7996: improve hardware restart reliability")
Fixes: 08813703ac ("wifi: mt76: mt7996: Destroy vif active links in mt7996_remove_interface()")
Link: https://patch.msgid.link/20260724124813.3961474-26-nbd@nbd.name
Signed-off-by: Felix Fietkau <nbd@nbd.name>

...

This commit is contained in:

Felix Fietkau 2026-07-24 12:48:10 +00:00

parent 7e4208e9f6

commit 75d2a4e212

1 changed files with 3 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

3

drivers/net/wireless/mediatek/mt76/mt7996/mac.c

View file