linux-kernel - Re: PCI PM: Restore standard config registers of all devices early

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Date:	Mon, 2 Feb 2009 16:28:58 -0800 (PST)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
cc:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Jesse Barnes <jesse.barnes@...el.com>,
	Andreas Schwab <schwab@...e.de>, Len Brown <lenb@...nel.org>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: PCI PM: Restore standard config registers of all devices early

On Tue, 3 Feb 2009, Rafael J. Wysocki wrote:
> 
> BTW, on the PMAC the problematic driver appears to be the radeon driver,
> according to Ben, and the breakage is not related to USB.

Hmm. atyfb_base.c has the same kind of things with magic PMAC code, but it 
doesn't follow the USB pattern - it just replaces "pci_set_power_state()" 
_entirely_. 

It seems a very interesting suspend routine, btw. It doesn't seem to do 
any of the pci_save_state() at all, just re-initializes from scratch. 
Maybe it is unhappy with the PM layer deciding to try to restore state 
since it clearly didn't..

		Linus
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