linux-kernel - Re: linuxppc-dev list <linuxppc-dev@...abs.org>

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Message-ID: <1416806356.4998.18.camel@kernel.crashing.org>
Date:	Mon, 24 Nov 2014 16:19:16 +1100
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Michael Ellerman <mpe@...erman.id.au>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>, linux-pci@...r.kernel.org,
	Alex Deucher <alexdeucher@...il.com>,
	Takashi Iwai <tiwai@...e.de>
Subject: Re: linuxppc-dev list <linuxppc-dev@...abs.org>

On Mon, 2014-11-24 at 16:08 +1100, Benjamin Herrenschmidt wrote:
> Hi Linus !
> 
> This series fix a nasty issue with radeon adapters on powerpc servers,
> it's all CC'ed stable and has the relevant maintainers ack's/reviews.

Hrm... git request-pull can't find the commit on the server (it's been
quite a while now, maybe some mirroring issue), so didn't put the
branch name in properly.

The branch name is "merge", ie:

  git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc.git merge

Cheers
Ben.

> Basically, some (radeon) adapters have issues with MSI addresses above
> 1T (only support 40-bits). We had powerpc specific quirk but it only
> listed a specific revision of an adapter that we shipped with our
> machines and didn't properly handle the audio function which some distros
> enable nowadays.
> 
> So we made the quirk generic and fixed both the graphic and audio drivers
> properly to use it.
> 
> Without that, ppc64 server machines will crash at boot with a radeon adapter.
> 
> Note: This has been brewing for a while, it just needed a last respin which
> got delayed due to us moving ozlabs to a new location in town and other such
> things taking priority.
> 
> Cheers,
> Ben.


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