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

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Message-Id: <200610051835.21704.oliver@neukum.org>
Date:	Thu, 5 Oct 2006 18:35:21 +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 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.

> Current thinking is that a driver will suspend its device whenever the 
> device isn't in use.  With usblp, that would be whenever the device file 
> isn't open.  See the example code in usb-skeleton.c.

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.

	Regards
		Oliver

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