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

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Message-ID: <alpine.LFD.2.00.0912071426100.3560@localhost.localdomain>
Date:	Mon, 7 Dec 2009 14:26:43 -0800 (PST)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Alan Stern <stern@...land.harvard.edu>
cc:	Zhang Rui <rui.zhang@...el.com>, "Rafael J. Wysocki" <rjw@...k.pl>,
	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 Mon, 7 Dec 2009, Alan Stern wrote:
> 
> There's no need to suspend the individual devices when the whole system 
> is going down.  They will automatically suspend when the controller 
> stops sending out SOF packets, which occurs when the root hub is 
> suspended.  The USB spec describes this, grandiosely, as a "global 
> suspend".

Ahh, but the sync vs async would then still matter on resume. No?

		Linus
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