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Date: Tue, 15 Jan 2013 15:12:39 +0000
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Maarten Lankhorst <m.b.lankhorst@gmail.com>
Cc: Borislav Petkov <bp@suse.de>, Andrew Morton <akpm@linux-foundation.org>,
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Subject: Re: [PATCH] fb: Rework locking to fix lock ordering on takeover
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> Just tested this patch on a macbook pro with i915 and radeon. First I get a nasty lockdep splat, then it locks up completely:
> 
> [   13.507373] fb: conflicting fb hw usage radeondrmfb vs EFI VGA - removing generic driver

The EFI driver is known to need other work of its own.

Alan