linux-kernel - Re: [PATCH 2/3] PCI: Suspend and resume PCI Express ports with interrupts disabled

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Message-ID: <alpine.LFD.2.00.0812060914100.3425@nehalem.linux-foundation.org>
Date:	Sat, 6 Dec 2008 09:15:22 -0800 (PST)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
cc:	Greg KH <greg@...ah.com>, Ingo Molnar <mingo@...e.hu>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Len Brown <lenb@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Takashi Iwai <tiwai@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	pm list <linux-pm@...ts.linux-foundation.org>
Subject: Re: [PATCH 2/3] PCI: Suspend and resume PCI Express ports with
 interrupts disabled



On Sat, 6 Dec 2008, Rafael J. Wysocki wrote:
> 
> I don't see why the suspend and resume of PCI Express ports should be
> handled with interrupts enabled and it may even lead to problems in
> some situations.

Absolutely. A PCI Express port is really just a PCI bridge, with some odd 
rules. We need to enable them early, exacly like regular PCI bridges, or 
we cannot walk the PCI bus hierarchy correctly.

Anyway, ack, ack, ack for the whole series.

			Linus
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