[PATCH 2/4] Add support for AP+STA on a single radio

Raphaël Mélotte raphael.melotte at mind.be
Wed Apr 5 05:21:50 PDT 2023

Hi Alvin,

On 3/30/23 00:38, Alvin Šipraga wrote:
> Isn't the issue you describe more a shortcoming of the wireless driver
> rather than hostapd/wpa_supplicant? The driver is able to notify hostapd
> of a channel switch on the AP interface, which might happen if a STA
> sharing the same radio got connected. Some fullmac drivers behave this
> way and I think it is correct. hostapd also handles it more or less OK.
> Here is a quite old commit which does something to that effect:
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c4f7863eae6f580a0373cbd8dc2731d082570e69
> Did you consider doing something like this? I know it is not easy to
> update all the drivers in the kernel...

I didn't know some drivers already did that.
Thanks for the link, I will take a closer look.

Now I wonder how many drivers already implement it and whether it makes sense or not for hostapd/wpa_supplicant to take care of it for the ones that don't (provided that it doesn't prevent other drivers from behaving normally).

Kind regards,


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