linux-kernel - Re: [PATCH] Revert "mt76: mt7921: enable aspm by default"

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Message-ID: <da79fa2a94c435a308ea763efc557fc352d0245c.camel@mediatek.com>
Date:   Thu, 2 Jun 2022 00:55:38 +0800
From:   Deren Wu <deren.wu@...iatek.com>
To:     Kalle Valo <kvalo@...nel.org>, Philippe Schenker <dev@...henker.ch>
CC:     <linux-wireless@...r.kernel.org>, Felix Fietkau <nbd@....name>,
        <linux@...mhuis.info>, "David S. Miller" <davem@...emloft.net>,
        "Jakub Kicinski" <kuba@...nel.org>,
        Lorenzo Bianconi <lorenzo.bianconi83@...il.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Paolo Abeni <pabeni@...hat.com>,
        Ryder Lee <ryder.lee@...iatek.com>,
        "Sean Wang" <sean.wang@...iatek.com>,
        Shayne Chen <shayne.chen@...iatek.com>,
        "YN Chen" <YN.Chen@...iatek.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-mediatek@...ts.infradead.org>, <netdev@...r.kernel.org>,
        <regressions@...ts.linux.dev>
Subject: Re: [PATCH] Revert "mt76: mt7921: enable aspm by default"

On Wed, 2022-06-01 at 11:58 +0300, Kalle Valo wrote:
> Philippe Schenker <dev@...henker.ch> writes:
> 
> > On Tue, 2022-04-12 at 19:06 +0800, Deren Wu wrote:
> > > On Tue, 2022-04-12 at 12:37 +0300, Kalle Valo wrote:
> > > > Philippe Schenker <dev@...henker.ch> writes:
> > > > 
> > > > > This reverts commit bf3747ae2e25dda6a9e6c464a717c66118c588c8.
> > > > > 
> > > > > This commit introduces a regression on some systems where the
> > > > > kernel is
> > > > > crashing in different locations after a reboot was issued.
> > > > > 
> > > > > This issue was bisected on a Thinkpad P14s Gen2 (AMD) with
> > > > > latest
> > > > > firmware.
> > > > > 
> > > > > Link: 
> > > > > 
https://urldefense.com/v3/__https://lore.kernel.org/linux-wireless/5077a953487275837e81bdf1808ded00b9676f9f.camel@pschenker.ch/__;!!CTRNKA9wMg0ARbw!09tjyaQlMci3fVI3yiNiDJKUW_qwNA_CbVhoAraeIX96B99Q14J4iDycWA9cq36Y$
> > > > >  
> > > > > Signed-off-by: Philippe Schenker <dev@...henker.ch>
> > > > 
> > > > Can I take this to wireless tree? Felix, ack?
> > > > 
> > > > I'll also add:
> > > > 
> > > > Fixes: bf3747ae2e25 ("mt76: mt7921: enable aspm by default")
> > > > 
> > > 
> > > Hi Kalle,
> > > 
> > > We have a patch for a similar problem. Can you wait for the
> > > verification by Philippe?
> > > Commit 602cc0c9618a81 ("mt76: mt7921e: fix possible probe failure
> > > after
> > > reboot")
> > > Link: 
> > > 
https://urldefense.com/v3/__https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/net/wireless/mediatek/mt76?id=602cc0c9618a819ab00ea3c9400742a0ca318380__;!!CTRNKA9wMg0ARbw!zCYyDcufJ-OLqQV6leCegA5SkNOOVjAIo-jzTHTk6HUWT9Gjt-bvSz8lr81Zv95u$
> > >  
> > > 
> > > I can reproduce the problem in my v5.16-rc5 desktop. And the
> > > issue can
> > > be fixed when the patch applied.
> > > 
> > > 
> > > Hi Philippe,
> > > 
> > > Can you please help to check the patch in your platform?
> > 
> > Hi Kalle and Deren,
> > 
> > I just noticed on my system and mainline v5.18 reboots do now work
> > however Bluetooth is no longer accessible after a reboot.
> > 
> > Reverting commit bf3747ae2e25dda6a9e6c464a717c66118c588c8 on top of
> > v5.18 solves this problem for me.
> > 
> > @Deren are you aware of this bug?
> > @Kalle Is there a bugtracker somewhere I can submit this?
> 
> For regressions the best is to submit it to the regressions list,
> CCed
> it now.
> 
Hi Philippe,

Tried your test with v5.18.0 on my desktop and both wifi/bt are still
avaible after reboot. The only problem is I need to insert btusb module
by command "modprobe btusb" to make BT workable.

I will check the issue on different platforms. If there are any
finding, I will let you know.

Regards,
Deren