linux-kernel - RE: PROBLEM: kernel warns about voluntary context switch within RCU critical section in rtw88

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Message-ID: <bfaa8714467a4954a045475e062f78b1@realtek.com>
Date:   Tue, 22 Aug 2023 01:47:34 +0000
From:   Ping-Ke Shih <pkshih@...ltek.com>
To:     Sergey Korolev <korolev.sergey@...il.com>,
        Kalle Valo <kvalo@...nel.org>,
        "linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: PROBLEM: kernel warns about voluntary context switch within RCU critical section in rtw88_usb



From: Sergey Korolev <korolev.sergey@...il.com> 
Sent: Monday, August 21, 2023 10:28 PM
To: Ping-Ke Shih <pkshih@...ltek.com>; Kalle Valo <kvalo@...nel.org>; linux-wireless@...r.kernel.org; linux-kernel@...r.kernel.org
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