linux-kernel - commit 66c1ca breaks fbdev mode switching

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Message-Id: <20090406204718.ce4909b3.krzysztof.h1@poczta.fm>
Date:	Mon, 6 Apr 2009 20:47:18 +0200
From:	Krzysztof Helt <krzysztof.h1@...zta.fm>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Andrey Borzenkov <arvidjaar@...il.com>,
	Andrea Righi <righi.andrea@...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: commit 66c1ca breaks fbdev mode switching

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

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