Subject: Re: [linux-usb-devel] Re: OHCI problems with suspend/resume
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Pavel Machek <pavel@ucw.cz>
Cc: David Brownell <david-b@pacbell.net>,
       Alan Stern <stern@rowland.harvard.edu>,
       Dominik Brugger <ml.dominik83@gmx.net>,
       kernel list <linux-kernel@vger.kernel.org>,
       linux-usb-devel@lists.sourceforge.net
In-Reply-To: <20030731094904.GC464@elf.ucw.cz>
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	 <20030726210123.GD266@elf.ucw.cz> <3F288CAB.6020401@pacbell.net>
	 <20030731094904.GC464@elf.ucw.cz>
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Date: 31 Jul 2003 23:25:18 +0200
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On Thu, 2003-07-31 at 11:49, Pavel Machek wrote:
> Hi!
> 
> >  - APM uses the pm_*() calls for a vetoable check,
> >    never issues SAVE_STATE, then goes POWER_DOWN.
> 
> I remember the reason... SAVE_STATE expects user processes to be
> stopped, which is not the case in APM. Perhaps that is easy to fix
> these days...

No ! You may feel better stopping user processes (and actuallty you
may require that for swsusp, I don't know) but the whole PM scheme is
designed to make that unnecessary. I do NOT stop user processes on
suspend-to-RAM on PowerMacs, I don't think neither APM nor ACPI need
that (I may be wrong here, but if that is the case, then some drivers
need fixing).

Ben.

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