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Sender: Larry Finger <larry.finger@gmail.com>
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Date:   Thu, 10 Feb 2022 12:54:50 -0600
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Subject: Re: Possible bug in cfg80211
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To:     Maxim Klimenko Sergievich <klimenkomaximsergievich@gmail.com>,
        linux-wireless@vger.kernel.org
References: <CAEqd1ZZucLqJMEktzmnCKzwXXkswzqJNf_yr2HZV20LcWtiR6A@mail.gmail.com>
From:   Larry Finger <Larry.Finger@lwfinger.net>
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On 2/10/22 07:25, Maxim Klimenko Sergievich wrote:
> Modules settings:
> blacklist pcspkr
> blacklist bluetooth
> blacklist kvm
> blacklist kvm_amd
> 
> # options amdgpu reset_method=5
> options snd_hda_intel power_save=1
> options rtw88_core support_bf=0
> options cfg80211 cfg80211_disable_40mhz_24ghz=1 bss_entries_limit=1
> options mac80211 minstrel_vht_only=1 ieee80211_default_rc_algo=minstrel_ht

Maxim,

What kernel are you running?

Why are you setting option cfg80211_disable_40mhz_24ghz=1 for cfg80211. Is is 
because the 2.4 GHz band is really crowded, or do you wish to throttle rtw88?

I am most concerned about that bss_entries_limit=1 option for cfg80211. Do you 
still get the warnings logged if you eliminate that one?

I also have a question for Johannes, et al. Should the "if (WARN_ON(!oldest))" 
in net/wireless/scan.c be a WARN_ON_ONCE()? It does not seem worthwhile to spam 
the logs. It is clear that once this happens, it will happen again and again.

Larry