linux-kernel - Re: [PATCH 1/1] wifi: rtw88: 8822b: disable call trace when write RF mode table fail

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Message-ID: <8734yff8vr.fsf@kernel.org>
Date:   Fri, 13 Oct 2023 07:23:36 +0300
From:   Kalle Valo <kvalo@...nel.org>
To:     Chukun Pan <amadeus@....edu.cn>
Cc:     pkshih@...ltek.com, linux-kernel@...r.kernel.org,
        linux-wireless@...r.kernel.org
Subject: Re: [PATCH 1/1] wifi: rtw88: 8822b: disable call trace when write
 RF mode table fail

Chukun Pan <amadeus@....edu.cn> writes:

> Hi, Ping-Ke
>
>> Why do you think this trace is useless? As I see, there is more than one callers.
>> Did you meet a real case it throws this trace? If yes, how about the frequency?
>
> [  217.651858] ------------[ cut here ]------------
> [  217.654813] write RF mode table fail
> [  217.657434] WARNING: CPU: 2 PID: 3705 at 0xffffffffa03df3cb [rtw88_8822b@...00000bf0fde9e+0x35000]
> [  217.662078] Modules linked in: rtw88_8822ce rtw88_8822c rtw88_8822be rtw88_8822b rtw88_8723de ...
> [  217.704412] RIP: 0010:0xffffffffa03df3cb [rtw88_8822b@...00000bf0fde9e+0x35000]
> ...
> [  217.737232] Call Trace:
> [  217.738683]  0xffffffffa03df943 [rtw88_8822b@...00000bf0fde9e+0x35000]
> [  217.740865]  0xffffffffa0385ab9 [rtw88_core@...00000a8d26f0d+0x1a000]
> [  217.742993]  0xffffffffa0279111 [mac80211@...000003cb4b3bd+0x7b000]
> [  217.745028]  0xffffffffa0239092 [cfg80211@...00000a951c4b5+0x46000]
> [  217.751368]  ? 0xffffffffa0238de0 [cfg80211@...00000a951c4b5+0x46000]
> [  217.773278] RIP: 0033:0x7ff0cdf8836c
> ...
> [  217.789457] ---[ end trace 177712424e9eab4a ]---
>
> As you can see this trace above, I don't think it's useful. This
> trace throws up a lot of register values but doesn't point out why.
> As long as I plug in the rtl8812bu or rtl8822be wifi modules, this
> trace will be thrown every time when the rtw88 driver is loaded.

_Why_ is that warning printed? Are your devices uncalibrated or are they
somehow else special?

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