[PATCH 7/7] AP: Avoid disabling HT/VHT/HE/EHT during CSA

[Jouni Malinen]

On Thu, Jul 31, 2025 at 03:57:03PM +0200, Benjamin Berg wrote:
> During CSA an AP should not disable its HT/VHT/HE/EHT capabilities
> as it is not allowed by the IEEE80211 specification.
> 
> - Modify the CSA flow to preserve the current HT/VHT/HE/EHT
>   capabilities allowing only to add additional ones.
> - Update the DFS CSA flow to also preserve the HT/VHT/HE/EHT
>   capabilities.
> 
> Modify one of the hwsim tests that verified that VHT capabilities
> are disabled during CSA, to verify that they are kept.

Could you please point to the exact IEEE 802.11 standard constraints you
are referring to here with "not allowed"?

In particular, how would one switch channels from 5 to 2.4 GHz when VHT
was enabled on 5 GHz? Or cases where moving from 2.4 GHz with HT and HE
enabled to 5 or 6 GHz where HT might not be needed?

-- 
Jouni Malinen                                            PGP id EFC895FA