Re: PROBLEM: kernel warns about voluntary context switch within RCU critical section in rtw88_usb

[Kalle Valo]

Ping-Ke Shih <pkshih@xxxxxxxxxxx> writes:

> From: Sergey Korolev <korolev.sergey@xxxxxxxxx> 
> Sent: Monday, August 21, 2023 10:28 PM
> To: Ping-Ke Shih <pkshih@xxxxxxxxxxx>; Kalle Valo <kvalo@xxxxxxxxxx>; linux-wireless@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx
> Subject: PROBLEM: kernel warns about voluntary context switch within RCU critical section in rtw88_usb
>> 
>> Please note I use an unmodified driver from the upstream 28c11c29494f1b34e39641eead9c60a8bd26170d
>> ("wifi: rtw88: fix not entering PS mode after AP stops") build for 6.2 kernel (Ubuntu 23.04).
>
> I feel Martin has been addressed this problem during development of SDIO and USB
> by 8a1e2fd8e2da ("wifi: rtw88: Move register access from rtw_bf_assoc() outside the RCU")
> Please take a look if this patch is existing in your source. 

Commit 8a1e2fd8e2da was merged to v6.3-rc1 so v6.2 won't have it.

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