linux-kernel - Re: commit 66c1ca breaks fbdev mode switching

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Message-ID: <20090406214528.GA17259@linux>
Date:	Mon, 6 Apr 2009 23:45:29 +0200
From:	Andrea Righi <righi.andrea@...il.com>
To:	Krzysztof Helt <krzysztof.h1@...zta.fm>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Andrey Borzenkov <arvidjaar@...il.com>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	"Antonino A. Daplas" <adaplas@...il.com>,
	linux-fbdev-devel@...ts.sourceforge.net,
	linux-pm@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
	Dave Jones <davej@...hat.com>,
	Harvey Harrison <harvey.harrison@...il.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Stefan Richter <stefanr@...6.in-berlin.de>
Subject: Re: commit 66c1ca breaks fbdev mode switching

On Mon, Apr 06, 2009 at 08:47:18PM +0200, Krzysztof Helt wrote:
> Hi,
> 
> The commit 66c1ca breaks fbdev mode switching. The first mode
> (selected with mode_option or during boot) is ok but every mode
> switch with fbset locks up computer. If the commit is reverted
> mode switching works correctly.
> 
> I do not understand why. I would be grateful if someone else
> can confirm the problem as well.
> 
> The commit's details are:
> 
> commit 66c1ca019078220dc1bf968f2bb18421100ef147
> Author: Andrea Righi <righi.andrea@...il.com>
> Date:   Tue Mar 31 15:25:18 2009 -0700
> 
>     fbmem: fix fb_info->lock and mm->mmap_sem circular locking dependency
>     
> 
> Regards,
> Krzysztof

Any lockdep info or oops? it just locks up the system?

Thanks,
-Andrea
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