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

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Date:	Fri, 9 Nov 2007 13:32:23 -0800
From:	Greg KH <greg@...ah.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Daniel Drake <dsd@...too.org>, rjw@...k.pl,
	linux-pm@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
	stern@...land.harvard.edu, kay.sievers@...y.org,
	linux-hotplug-devel@...ts.sourceforge.net, oneukum@...e.de
Subject: Re: [PATCH] create /sys/.../power when CONFIG_PM is set

On Fri, Nov 09, 2007 at 01:05:55PM -0800, Andrew Morton wrote:
> On Wed,  7 Nov 2007 10:10:43 +0000 (GMT)
> Daniel Drake <dsd@...too.org> 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.
> > 
> 
> Your patch is for 2.6.24-rc2 and 2.6.23, afacit.  It needed some work to
> apply on Greg's tree because the new pm_sleep_lock() and pm_sleep_unlock()
> went and copied the same bug as you've fixed here.
> 
> I guess the right thing to do is to apply your patch as-is to 2.6.24-rcX
> and to 2.6.23.x.  I can't really do that because doing so would wreck my
> copy of Greg's tree.
> 
> 
> So I'll run with the below (I think it's right) and will let Greg sort it
> out ;)

Yeah, I'll sort it all out :)

thanks,

greg k-h
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