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

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Date:	Mon, 7 Dec 2009 22:47:02 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Alan Stern <stern@...land.harvard.edu>,
	Zhang Rui <rui.zhang@...el.com>,
	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 Monday 07 December 2009, Linus Torvalds wrote:
> 
> On Mon, 7 Dec 2009, Alan Stern wrote:
> > 
> > It only seems that way because you didn't take into account devices 
> > that suspend synchronously but whose children suspend asynchronously.
> 
> But why would I care? If somebody suspends synchronously, then that's what 
> he wants.
> 
> > A synchronous suspend routine for a device with async child suspends
> > would have to look just like your usb_node_suspend():
> 
> Sure. But that sounds like a "Doctor, it hurts when I do this" situation. 
> Don't do that.
> 
> Make the USB host controller do its suspend asynchronously. We don't 
> suspend PCI bridges anyway, iirc (but I didn't actually check).

That's correct, we don't.

Rafael
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