linux-kernel - RE: [Bug report] rtw89: 8852b: IO_PAGE_FAULTs with beacon filter feature enabled

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Message-ID: <b06f906cbdee403f9aa9442a5d7cab29@realtek.com>
Date: Tue, 24 Jun 2025 00:14:19 +0000
From: Ping-Ke Shih <pkshih@...ltek.com>
To: Bitterblue Smith <rtl8821cerfe2@...il.com>,
        Bernie Huang
	<phhuang@...ltek.com>,
        Fedor Pchelkin <boddah8794@...il.com>
CC: "linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [Bug report] rtw89: 8852b: IO_PAGE_FAULTs with beacon filter feature enabled

Bitterblue Smith <rtl8821cerfe2@...il.com> wrote:
> On 14/05/2025 06:29, Bernie Huang wrote:
> > -----Original Message-----
> > From: Ping-Ke Shih <pkshih@...ltek.com>
> > Sent: Thursday, May 8, 2025 8:59 AM
> > To: Fedor Pchelkin <boddah8794@...il.com>
> > Cc: Bernie Huang <phhuang@...ltek.com>; linux-wireless@...r.kernel.org; linux-kernel@...r.kernel.org
> > Subject: RE: [Bug report] rtw89: 8852b: IO_PAGE_FAULTs with beacon filter feature enabled
> >
> > Fedor Pchelkin <boddah8794@...il.com> wrote:
> >>> On Thu, 17. Apr 01:05, Ping-Ke Shih wrote:
> >>>> Fedor Pchelkin <boddah8794@...il.com> wrote:
> >>>>>
> >>>>> On Wed, 16. Apr 00:49, Ping-Ke Shih wrote:
> >>>>>> As bisection, can I summarize as below table?
> >>>>>>
> >>>>>>     d56c261e52           firmware             IO_PAGE_FAULT
> >>>>>>    (CQM support)
> >>>>>>   ---------------      -----------          -----------------
> >>>>>>       o                 0.29.29.7                  yes
> >>>>>>       o                 0.29.29.5                  no
> >>>>>>       x                 0.29.29.7                  no
> >>>>>>       x                 0.29.29.5                  no
> >>>>>>
> >>>>>> If this table is correct, we will check the beacon filter feature in firmware.
> >>>>>>
> >>>>>
> >>>>> Yes, it correctly describes the situation. My suspicion currently
> >>>>> falls on the beacon filter feature in firmware, too.
> >>>>
> >>>> Could you help to test when we have updated firmware?
> >>>>
> >>>
> >>> Hi,
> >>>
> >>> Were you able to reproduce or track down the problem?
> >
> >> Yes, we have reproduced this problem, and we found sending firmware command during deep PS mode will
> raise IO_PAGE_FAULT. With below setting to disable deep PS > mode, the symptom can disappear.
> >
> >>   rtw89_core.ko disable_ps_mode=y
> >
> >> Now we are arranging CAT-C equipment to capture signals in PCIE bus to see what happens at that moment.
> >
> >> One possible solution (workaround) is to avoid sending firmware commands during deep PS mode, before
> we found out the root cause.
> >
> > Hi Fedor,
> >
> > Could you please check whether the attached firmware fixes this issue?
> > The firmware version should be 1.29.29.9.
> By the way, what does the first number mean? The previous version was
> 0.29.29.8. I would expect only the last number to change for this bug fix.

This firmware is for testing only. The formal firmware should be 0.29.29.x.