Re: iwd 2.22 scan fails but... works ok with ConnMan

[James Prestwood <prestwoj@gmail.com>]

Hi Piotr,

On 10/24/24 7:32 AM, Piotr Oniszczuk wrote:
> Pls see inline
>
>> Wiadomość napisana przez Denis Kenzior <denkenz@gmail.com> w dniu 24.10.2024, o godz. 16:00:
>>
>> Hi Piotr,
>>
>>>> What hardware is being used?
>>> this is allwinner h618 zero3 sbc with uwe5622 wifi chip.
>>> Kernel is 6.11.5 with uwe5622 driver backported from vendor bsp (https://github.com/warpme/minimyth2/blob/master/script/kernel/linux-6.11/files/0630-net-wireless-add-uwe5622-support-v20231020.patch)
>> So yet another non-upstream driver, sigh.
> Ah - believe me: mine frustration because of this is much bigger :-p
>
>>>>   Can you include iwmon output?
> After compiling nlmon now is much better: https://gist.github.com/warpme/4b21b51dd1e2c74075498acd9af5082d
>
>> Is this in any way related to the problem reported in this thread?
>> https://lore.kernel.org/all/CAOCHtYj9OjZGQ=G139i=KRRcxpFD-1=GSvUPmFYaqSvFz0NwJg@mail.gmail.com/
>>
> Indeed I saw this thread.
> Some time ago I was trying to play with iwd.cfg without success
> Maybe I put incorrect settings there?
>
> May you hint me what exactly I need to add in iwd.cfg?
>
> To load wifi kernel module I’m using: modprobe sprdwl_ng
>
> Btw: all was working ok few versions back of iwd/kernel
> Unfortunately I can’t say which change: iwd or kernel breaks iwd operation on uwe5622 wifi….
>     
>
Thank you for the iwmon logs, that really helped diagnose the issue. 
There are a few patches on the list that I just sent which will 
hopefully fix your problem. We identified a few separate issues:

  - Incorrect starting frequency for operating class 136
  - No check for the correct band when checking the e4 table
  - No check for the correct band when parsing the advertised 
frequencies from the kernel/driver

  Your hardware seems to be advertising some frequencies [1] which are 
not exactly common and this threw IWD for a loop and exposed several 
bugs. These fixes will basically disallow those frequencies, but we need 
to take a closer look at them to be able to parse them correctly.

[1] https://en.wikipedia.org/wiki/List_of_WLAN_channels#5.9_GHz_(802.11p)

Thanks,

James