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wifi: mt76: mt7925: restore the legacy BSS after MLO teardown

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Removing the last link of an MLD interface leaves the firmware with the
MLD BSS and DEV entry: the removal loop skips the deflink, and the
hweight16(mvif->valid_links) fallback reads the stale pre-update
valid_links, which is still non-zero. The entry keeps the per-link MAC
address, so every subsequent legacy association fails authentication
until the interface is removed or the module is reloaded.

Remove the deflink BSS and add it back as a legacy BSS on the transition
to zero links.

Fixes: 69acd6d910b0 ("wifi: mt76: mt7925: add mt7925_change_vif_links")
Signed-off-by: Aaron Ma <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Felix Fietkau <[email protected]>
This commit is contained in:
Aaron Ma
2026-09-01 13:25:05 +02:00
committed by Felix Fietkau
parent a6e5a072eb
commit 5772439beb
1 changed files with 12 additions and 0 deletions
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mt7925/main.c
+12
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@@ -2308,6 +2308,18 @@ mt7925_change_vif_links(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
mvif->valid_links = new_links;
/* Restore the legacy BSS after disabling MLO */
if (old_links && !new_links) {
mt792x_mac_link_bss_remove(dev, &mvif->bss_conf,
&mvif->sta.deflink);
err = mt7925_mac_link_bss_add(dev, &vif->bss_conf,
&mvif->sta.deflink);
if (err < 0) {
mt792x_mutex_release(dev);
return err;
}
}
mt792x_mutex_release(dev);
return 0;