Failure to get 6Ghz Link w/ Self Managed Reg Dom

[Dylan Eskew]

Hi all,

I've seen an issue with the Intel BE200 which frequently prevents the 
6Ghz eMLSR MLO link being established. This appears to be related to the 
radio self-managing its regulatory domain by first scanning in 2.4/5Ghz, 
and then after seeing appropriate beacons, scanning 6Ghz in a second 
scan. With a tri-band MLO SSID, obviously the 2.4/5Ghz beacons are seen 
in that first scan, prompting the connection to begin. However there 
seems to be a race between the when scan results are finished and parsed 
from the 6Ghz scan and the authentication setting up IEs for usable 
links based on BSS's that are currently cached (see 
`wpas_sme_set_mlo_links()` and `wpa_bss_get_usable_links()`) - when the 
6Ghz beacon hasn't been parsed yet, that link isn't deemed usable by the 
current logic.

If anyone has ideas on solutions, I'm willing to implement it. I'm just 
not sure the best way to signal the connect work that it needs to wait 
for the 6Ghz scan in this specific case to finish before proceeding.

-- Dylan