From mboxrd@z Thu Jan  1 00:00:00 1970
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Subject: Re: radeon: RFC speed cap detection on ppc64
Date: Mon, 22 Oct 2012 16:44:44 +0100
Message-ID: <20121022164444.2b0775ce@pyramind.ukuu.org.uk>
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	<508565FA.4040908@redhat.com>
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To: Adam Jackson <ajax@redhat.com>
Cc: Lucas Kannebley Tavares <lucaskt@linux.vnet.ibm.com>, dri-devel@lists.freedesktop.org, Benjamin Herrenschmidt <benh@au1.ibm.com>, linux-pci@vger.kernel.org, Nishanth Aravamudan <nacc@linux.vnet.ibm.com>, linux-kernel@vger.kernel.org, Brian King <brking@linux.vnet.ibm.com>, Bjorn Helgaas <bhelgaas@google.com>
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> That (walking all parent nodes) is probably the safest thing to do.  I'm 
> not sure whether it's optimal.  It would likely depend on whether you 
> can meaningfully have a bridge that's faster on the downstream side than 
> on the upstream.

This is architecture goo at heart - would this be better as a helper in
the PCI and arch PCI code ?

Alan