linux-kernel - Re: [linux-pm] Re: [PATCH] Remove process freezer from suspend to RAM pathway

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Date:	Wed, 4 Jul 2007 10:44:22 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Paul Mackerras <paulus@...ba.org>
cc:	Oliver Neukum <oliver@...kum.org>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	<linux-pm@...ts.linux-foundation.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [linux-pm] Re: [PATCH] Remove process freezer from suspend to
 RAM pathway

On Wed, 4 Jul 2007, Paul Mackerras wrote:

> Oliver Neukum writes:
> 
> > USB devices certainly have suspend methods.
> 
> Indeed, and the USB framework has code to know when the host
> controller is suspended and avoid trying to send out urbs in that
> case.  Or at least it did last time I looked at it in any detail; it's
> been "just working" - including suspending and resuming, without the
> freezer - for quite a while now.

Evidently you haven't been stressing it.  You might try suspending
while printing to a USB printer.

Alan Stern

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