linux-kernel - Re: [GIT PULL] PM updates for 2.6.33

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Date:	Sat, 5 Dec 2009 17:50:10 -0800 (PST)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
cc:	LKML <linux-kernel@...r.kernel.org>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	pm list <linux-pm@...ts.linux-foundation.org>
Subject: Re: [GIT PULL] PM updates for 2.6.33



On Sun, 6 Dec 2009, Rafael J. Wysocki wrote:
> 
> > Multi-function PCI devices commonly share registers - they're on the same
> > chip, after all.  And even when the _hardware_ is totally independent, we
> > often have discovery rules and want to initialize in order because different
> > drivers  will do things like unregister entirely on suspend, and then
> > re-register on resume.
> 
> Do any of the PCI drivers do that?

It used to be common at least for ethernet - there were a number of 
drivers that essentially did the same thing on suspend/resume and on 
module unload/reload.

The point is, I don't know. And neither do you. It's much safer to just do 
drivers one by one, and not touch drivers that people don't test.

			Linus
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