linux-kernel - Re: dell_rbtn - kernel panic at boot...

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Date:	Tue, 26 May 2015 21:16:58 -0700
From:	Darren Hart <dvhart@...radead.org>
To:	Pali Rohár <pali.rohar@...il.com>
Cc:	Matthew Garrett <mjg59@...f.ucam.org>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Valdis Kletnieks <Valdis.Kletnieks@...edu>,
	lkml <linux-kernel@...r.kernel.org>,
	platform-driver-x86@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: dell_rbtn - kernel panic at boot...

On Mon, May 25, 2015 at 08:03:42AM +0200, Pali Rohár wrote:
> On Monday 25 May 2015 07:01:21 Matthew Garrett wrote:
> > On Sun, May 24, 2015 at 09:44:32PM -0700, Darren Hart wrote:
> > > Greg, Matthew, I'm tempted to recommend this 434 line driver be
> > > rolled into dell-laptop.c. Any strong opinions?
> > 
> > Mrm. It's slightly conceptually nasty in that one's an ACPI driver
> > and one's calling a Dell custom interface, but I think merging them
> > is probably the last bad answer.
> 
> I think merging does not fix our problem. dell laptop rfkill driver 
> needs to be initialized after dell-rbtn acpi driver register itself.

If they were the same driver, you could control this ordering.

> 
> And dell-laptop and dell-rbtn are two different devices (one dell smbios 
> and one acpi) and it for me it sounds like bad idea too...

We all agree it's a bad idea - the point Mathew and I made was it may be the
"least bad" idea (all the others may be worse).

I'm looking into this, but I don't have an easy answer for you. This one is
going to take some research on your part to get to the right answer.

-- 
Darren Hart
Intel Open Source Technology Center
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