linux-kernel - Re: [linux-usb-devel] error to be returned while suspended

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Message-Id: <200610052044.00324.oliver@neukum.org>
Date:	Thu, 5 Oct 2006 20:43:59 +0200
From:	Oliver Neukum <oliver@...kum.org>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	Pavel Machek <pavel@....cz>, linux-kernel@...r.kernel.org,
	linux-usb-devel@...ts.sourceforge.net
Subject: Re: [linux-usb-devel] error to be returned while suspended

Am Donnerstag, 5. Oktober 2006 20:24 schrieb Alan Stern:
> On Thu, 5 Oct 2006, Oliver Neukum wrote:
> 
> > Am Donnerstag, 5. Oktober 2006 18:21 schrieb Alan Stern:
> > > Currently we don't have any userspace APIs for such a daemon to use.  The 
> > > only existing API is deprecated and will go away soon.
> > 
> > I trust it'll be replaced.
> 
> Yes.  I think Greg wants to wait until the old API is completely gone.

I doubt it will. There's a potential need.

[..]
> > In the general case the idea seems insufficient. If I close my laptop's lid
> > I want all input devices suspended, whether the corresponding files are
> > opened or not. In fact, if I have port level power control I might even
> > want to cut power to them.
> 
> That's a separate issue.  You were talking about runtime suspend, but 
> closing the laptop's lid is a system suspend.

Why? If you freeze my batch jobs or make unavailable the servers
running on my laptop I'd be very unhappy.
But I want to make jostling a mouse or other input device safe. Thus
I want them to be suspended without autoresume. We need flexibility.

[..]
> P.S.: Cutting off port power is yet another issue.  It isn't a suspend in 
> the strict sense, because it will break an existing power session.

Yes, it is an additional more complicated option.

	Regards
		Oliver
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