From: Sergey Korolev <[email protected]>
Sent: Monday, August 21, 2023 10:28 PM
To: Ping-Ke Shih <[email protected]>; Kalle Valo <[email protected]>; [email protected]; [email protected]
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.
Ping-Ke
Ping-Ke Shih <[email protected]> writes:
> From: Sergey Korolev <[email protected]>
> Sent: Monday, August 21, 2023 10:28 PM
> To: Ping-Ke Shih <[email protected]>; Kalle Valo <[email protected]>; [email protected]; [email protected]
> 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.
--
https://patchwork.kernel.org/project/linux-wireless/list/
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
> -----Original Message-----
> From: Kalle Valo <[email protected]>
> Sent: Tuesday, August 22, 2023 1:42 PM
> To: Ping-Ke Shih <[email protected]>
> Cc: Sergey Korolev <[email protected]>; [email protected];
> [email protected]
> Subject: Re: PROBLEM: kernel warns about voluntary context switch within RCU critical section in rtw88_usb
>
> Ping-Ke Shih <[email protected]> writes:
>
> > From: Sergey Korolev <[email protected]>
> > Sent: Monday, August 21, 2023 10:28 PM
> > To: Ping-Ke Shih <[email protected]>; Kalle Valo <[email protected]>; [email protected];
> [email protected]
> > 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.
>
Sergey said he uses driver from 28c11c29494f that is v6.4-rc5 or v6.5, so
seemingly it should include Martin's patch. Not sure what is wrong.
Ping-Ke