linux-kernel - Re: [PATCH] create /sys/.../power when CONFIG

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Message-ID: <Pine.LNX.4.44L0.0711071143200.4444-100000@iolanthe.rowland.org>
Date:	Wed, 7 Nov 2007 11:45:14 -0500 (EST)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Daniel Drake <dsd@...too.org>
cc:	rjw@...k.pl, <linux-pm@...ts.linux-foundation.org>,
	<linux-kernel@...r.kernel.org>, <kay.sievers@...y.org>,
	<linux-hotplug-devel@...ts.sourceforge.net>, <greg@...ah.com>,
	<oneukum@...e.de>
Subject: Re: [PATCH] create /sys/.../power when CONFIG_PM is set

On Wed, 7 Nov 2007, Daniel Drake wrote:

> The CONFIG_SUSPEND changes in 2.6.23 caused a regression under certain
> configuration conditions (SUSPEND=n, USB_AUTOSUSPEND=y) where all USB device
> attributes in sysfs (idVendor, idProduct, ...) silently disappeared, causing
> udev breakage and more.
> 
> The cause of this is that the /sys/.../power subdirectory is now only created
> when CONFIG_PM_SLEEP is set, however, it should be created whenever CONFIG_PM
> is set to handle the above situation. The following patch fixes the
> regression.
> 
> Signed-off-by: Daniel Drake <dsd@...too.org>

I haven't tried applying this, but it looks okay to me.  There may be 
some conflict with other changes already merged in the PM core.

Alan Stern

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