linux-kernel - Re: [PATCH -mm 5/5] b43: Avoid unregistering device objects during suspend

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Message-ID: <20080125074746.GC4134@ucw.cz>
Date:	Fri, 25 Jan 2008 07:47:46 +0000
From:	Pavel Machek <pavel@....cz>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Michael Buesch <mb@...sch.de>,
	pm list <linux-pm@...ts.linux-foundation.org>,
	Alan Stern <stern@...land.harvard.edu>,
	Len Brown <lenb@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	bcm43xx-dev@...ts.berlios.de,
	Alessandro Rubini <rubini@...vis.unipv.it>,
	Richard Purdie <rpurdie@...ys.net>
Subject: Re: [PATCH -mm 5/5] b43: Avoid unregistering device objects during suspend

On Fri 2008-01-25 01:37:33, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rjw@...k.pl>
> 
> Modify the b43 driver to avoid deadlocking suspend and resume,
> which happens as a result of attempting to unregister device objects
> locked by the PM core during suspend/resume cycles.  Also, make it
> use a suspend-safe method of unregistering device object in the
> resume error path.
> 
> Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
> Acked-by: Michael Buesch <mb@...sch.de>

Maybe we should have global suspend_in_progress (or maybe system_state
== suspending?) and automatically switch to schedule_removal() while
it is set?

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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