A station MLD is configured across every radio it may use, which marks all
of those radios as channel following. Only the radios the station actually
holds a link on have a channel to follow; the rest waited for one that never
arrived, so they ignored their configured channel and kept whatever ACS had
picked at start up. Later channel changes were dropped as well, because the
pending follow was treated as authoritative.
Track the frequency reported through apsta_state per radio and let a radio
without one apply its own configuration. The supplicant marks the radios
holding no link when the station completes an association, and repeats the
notification on link reconfiguration, so radios are handed back and forth as
the station adds or drops links rather than staying stuck on the first
association.
Signed-off-by: Felix Fietkau <nbd@nbd.name>
aa2329f858