linux-kernel - Re: [PATCH] Bluetooth: btmtk: Remove resetting mt7921 before downloading the fw

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Message-ID: <87iktk4d9l.wl-tiwai@suse.de>
Date: Tue, 22 Oct 2024 12:56:22 +0200
From: Takashi Iwai <tiwai@...e.de>
To: Linux regressions mailing list <regressions@...ts.linux.dev>,
	"Linux regression tracking (Thorsten Leemhuis)"
 <regressions@...mhuis.info>
Cc: "Chris Lu (é™¸ç¨šæ³“)"
 <Chris.Lu@...iatek.com>,	"luiz.dentz@...il.com" <luiz.dentz@...il.com>,
	"marc.payne@...sys.co.uk" <marc.payne@...sys.co.uk>,	"marcel@...tmann.org"
 <marcel@...tmann.org>,	"linux-mediatek@...ts.infradead.org"
 <linux-mediatek@...ts.infradead.org>,	"linux-kernel@...r.kernel.org"
 <linux-kernel@...r.kernel.org>,	"linux-bluetooth@...r.kernel.org"
 <linux-bluetooth@...r.kernel.org>,	"Deren Wu (ÙëÓììÒ)" <Deren.Wu@...iatek.com>,	"johan.hedberg@...il.com"
 <johan.hedberg@...il.com>,	"Steve Lee (æŽè¦–èª )" <steve.lee@...iatek.com>,	Sean Wang
 <Sean.Wang@...iatek.com>,	"Aaron Hou (ä¾¯ä¿Šä»°)" <Aaron.Hou@...iatek.com>,
	"Hao Qin (ç§¦æµ©)" <Hao.Qin@...iatek.com>
Subject: Re: [PATCH] Bluetooth: btmtk: Remove resetting mt7921 before downloading the fw

On Mon, 14 Oct 2024 11:29:40 +0200,
Linux regression tracking (Thorsten Leemhuis) wrote:
> 
> On 20.09.24 08:27, Chris Lu (é™¸ç¨šæ³“) wrote:
> > On Thu, 2024-09-19 at 23:25 +0100, marc.payne@...sys.co.uk wrote:
> >>  	 
> >> External email : Please do not click links or open attachments until
> >> you have verified the sender or the content.
> >>  Hi Chris and Luiz,
> >>
> >> What were your thoughts on the findings in my email dated 18th
> >> September?
> > 
> > Thanks for your suggestion.
> > 
> > I've prepared the same environment (Kernel v6.11 + MT7921AUN dongle) to
> > reproduce the issue, collected necessary logs locally and also
> > initiated an internal discussion to clarify the root cause of this
> > symptom. We'll review the changes between two firmware
> > (20230526/20231109) if it's a bug or not.
> > 
> > It may take some time to investigate. I'll let you know if there is any
> > progress.
> 
> Just wondering: Chris Lu, and Marc, what's the status here? From here it
> looks like there was no progress to fix this regression for a while, but
> it's easy to miss something, that's why I ask.
> 
> Ciao, Thorsten

FWIW, the similar bug was reported for the recent 6.11.x kernel on
openSUSE Tumbleweed, and this patch was confirmed to work around the
crash at boot:
  https://bugzilla.suse.com/show_bug.cgi?id=1231599

It'd be great if you can go ahead and merge the proper fix to the
upstream.

Let me know if you have another patch to test.  Then I can create a
test kernel package and ask the bug reporter for testing.


thanks,

Takashi