netdev - Re: [Intel-wired-lan] [PATCH net v3] net: ethtool: do runtime PM outside RTNL

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Date: Mon, 25 Dec 2023 03:21:54 -0800
From: Marc MERLIN <marc@...lins.org>
To: Sasha Neftin <sasha.neftin@...el.com>
Cc: Heiner Kallweit <hkallweit1@...il.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Johannes Berg <johannes@...solutions.net>, netdev@...r.kernel.org,
	"intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>,
	Przemek Kitszel <przemyslaw.kitszel@...el.com>
Subject: Re: [Intel-wired-lan] [PATCH net v3] net: ethtool: do runtime PM
 outside RTNL

On Mon, Dec 25, 2023 at 10:03:23AM +0200, Sasha Neftin wrote:
> > > I can't patch that kernel easily. How exactly do I disable runtime PM
> > > from the kernel command line for "that device" which I'm not even sure
> > 
> > Change <device>/power/control from "auto" to "on".
> 
> Need to figure out your controller location in a file system via lspci/lspci
> -t and then change to "on"
> For example: echo on >
> /sys/devices/pci0000\:00/0000\:00\:1c.0/0000\:ae\:00.0/power/control
> 
> We are starting to look at this problem, but I can't reproduce the problem
> on my machines yet.

Thanks. I realized it was going to be hard either way if the boot hangs
before I get to a command prompt, which was what was happening
yesterday.
I had to boot ubuntu to debug a sound issue, and it was very tricky
since most of the time it hung before I got to a command prompt, but I
was finally able to get it to work long enough to debug the sound issue
and go back to my self built kernel to port over the sound config I
needed.

I wish I could tell you exactly how to reproduct this in a more useful
way, sorry about that.

Marc
-- 
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
 
Home page: http://marc.merlins.org/                       | PGP 7F55D5F27AAF9D08