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From: Thorsten Leemhuis <>
To: Manivannan Sadhasivam <>,
Cc:,,,,,,,,, Pengyu Ma <>
Subject: Re: [PATCH] bus: mhi: core: Add support for forced PM resume
Date: Mon, 6 Dec 2021 18:39:19 +0100	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

Hi, this is your Linux kernel regression tracker speaking.

On 06.12.21 17:10, Manivannan Sadhasivam wrote:
> From: Loic Poulain <>
> For whatever reason, some devices like QCA6390, WCN6855 using ath11k
> are not in M3 state during PM resume, but still functional. The
> mhi_pm_resume should then not fail in those cases, and let the higher
> level device specific stack continue resuming process.
> Add a new parameter to mhi_pm_resume, to force resuming, whatever the
> current MHI state is. This fixes a regression with non functional
> ath11k WiFi after suspend/resume cycle on some machines.
> Bug report:
> Cc: #5.13
> Fixes: 020d3b26c07a ("bus: mhi: Early MHI resume failure in non M3 state")
> Reported-by: Kalle Valo <>
> Reported-by: Pengyu Ma <>

FWIW: In case you need to send an improved patch, could you please add
this before the 'Reported-by:' (see (¹) below for the reasoning):


And if the patch is already good to go: could the subsystem maintainer
please add it when applying? See(¹) for the reasoning.


Ciao, Thorsten, your Linux kernel regression tracker.

(¹) Long story: The commit message would benefit from a link to the
regression report on the mailing list, for reasons explained in
Documentation/process/submitting-patches.rst. To quote:

If related discussions or any other background information behind the
change can be found on the web, add 'Link:' tags pointing to it. In case
your patch fixes a bug, for example, add a tag with a URL referencing
the report in the mailing list archives or a bug tracker;

This concept is old, but the text was reworked recently to make this use
case for the Link: tag clearer. For details see:

Yes, that "Link:" is not really crucial; but it's good to have if
someone needs to look into the backstory of this change sometime in the
future. But I care for a different reason. I'm tracking this regression
(and others) with regzbot, my Linux kernel regression tracking bot. This
bot will notice if a patch with a Link: tag to a tracked regression gets
posted and record that, which allowed anyone looking into the regression
to quickly gasp the current status from regzbot's webui
( ) or its reports. The
bot will also notice if a commit with a Link: tag to a regression report
is applied by Linus and then automatically mark the regression as
resolved then.

IOW: this tag makes my life a regression tracker a lot easier, as I
otherwise have to tell regzbot manually when the fix lands. :-/

P.S.: As a Linux kernel regression tracker I'm getting a lot of reports
on my table. I can only look briefly into most of them. Unfortunately
therefore I sometimes will get things wrong or miss something important.
I hope that's not the case here; if you think it is, don't hesitate to
tell me about it in a public reply. That's in everyone's interest, as
what I wrote above might be misleading to everyone reading this; any
suggestion I gave they thus might sent someone reading this down the
wrong rabbit hole, which none of us wants.

BTW, I have no personal interest in this issue, which is tracked using
regzbot, my Linux kernel regression tracking bot
( I'm only posting
this mail to get things rolling again and hence don't need to be CC on
all further activities wrt to this regression.

#regzbot ^backmonitor:

  reply	other threads:[~2021-12-06 17:39 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-06 16:10 Manivannan Sadhasivam
2021-12-06 17:39 ` Thorsten Leemhuis [this message]
2021-12-07 14:47 ` Kalle Valo
2021-12-07 23:41 ` Hemant Kumar
2021-12-08  8:30   ` Manivannan Sadhasivam
2021-12-08  8:42 ` Manivannan Sadhasivam

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