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Message-Id: <200708031344.03282.oliver@neukum.org>
Date:	Fri, 3 Aug 2007 13:44:02 +0200
From:	Oliver Neukum <oliver@...kum.org>
To:	linux-usb-devel@...ts.sourceforge.net
Cc:	Matthew Garrett <mjg59@...f.ucam.org>,
	David Brownell <david-b@...bell.net>, Greg KH <gregkh@...e.de>,
	Alan Stern <stern@...land.harvard.edu>,
	linux-kernel@...r.kernel.org
Subject: Re: [linux-usb-devel] [PATCH] USB: Only enable autosuspend by default on certain device classes

Am Freitag 03 August 2007 schrieb Matthew Garrett:
> On Thu, Aug 02, 2007 at 11:01:08PM -0700, David Brownell wrote:
> 
> > Seems to me it ought to be practical to organize a database that can
> > be consulted by an outcall from udev, disabling autosuspend on devices
> > which are known to be broken.  The "modules.usbmap" syntax is an obvious
> > place to start (painful though it is), and I'm sure there are folk who
> > would prefer web-accessible/updatable databases.
> 
> It's certainly possible to do that, but it's also possible to have a 
> userspace solution that whitelists devices. The question is whether the 
> default kernel behaviour should be "Save power, but potentially break 
> some of my devices" or "Don't break my devices, but use some more 
> powre".

If both options have drawbacks, IMHO we follow the standard, which
says that devices must support suspension.

	Regards
		Oliver

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