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Message-ID: <d14d6b4c02282d6ef48a936b1ac8be71c80a8835.camel@sipsolutions.net>
Subject: Re: [REGRESSION] 6.7 broke wifi "AP is in CSA process, reject auth"
From: Johannes Berg <johannes@sipsolutions.net>
To: coldolt <andypalmadi@gmail.com>
Cc: ayala.beker@intel.com, linux-wireless@vger.kernel.org, 
	regressions@lists.linux.dev
Date: Tue, 16 Jan 2024 12:43:56 +0100
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On Tue, 2024-01-16 at 01:56 +0200, coldolt wrote:
> I can try to keep connecting for over 5 minutes, it never connects,
> keeps outputting the same dmesg message. The kernel before 6.7
> connects immediately.


>         DS Parameter set: channel 36
>         Unknown IE (60): 01 16 24 09
>=20

So it is indeed - as expected of course - advertising that it's about to
switch channel and even saying everyone else needs to be *quiet*. This
is

struct ieee80211_ext_chansw_ie {
        u8 mode;
        u8 new_operating_class;
        u8 new_ch_num;
        u8 count;
} __packed;


so mode=3D=3D1 indicates quiet, new_operating_class/new_ch_num are actually
the channel it's currently on, and count is 9.

Can you say if it actually changes the count? Maybe capture on channel
36 using the NIC as a sniffer what it does over time:
https://wireless.wiki.kernel.org/en/users/drivers/iwlwifi/debugging#air_sni=
ffing


Initially I'd say though that if this situation persists, then your AP
is having some problems and we'd not have stayed connected without the
patch in question either. If you want, maybe revert and see what the
symptom is then?

johannes