From: Jesse Barnes <jbarnes@virtuousgeek.org>
To: Clemens Ladisch <clemens@ladisch.de>
Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] PCI quirk: AMD 780: work around wrong vendor ID on APC bridge
Date: Fri, 28 May 2010 12:25:21 -0700 [thread overview]
Message-ID: <20100528122521.71ecab11@virtuousgeek.org> (raw)
In-Reply-To: <4BFCF616.6060608@ladisch.de>
On Wed, 26 May 2010 12:21:10 +0200
Clemens Ladisch <clemens@ladisch.de> wrote:
> In all AMD 780 family northbridges, the vendor ID of the internal
> graphics PCI/PCI bridge reads not as AMD but as that of the mainboard
> vendor, because the hardware actually returns the value of the subsystem
> vendor ID (erratum 18).
>
> We currently have additional quirk entries for Asus and Acer, but it is
> likely that we will encounter more systems with other vendor IDs.
>
> Since we do not know in advance all possible vendor IDs, a better way to
> find the device is to declare the quirk on the host bridge, whose ID is
> always correct, and use that device as a stepping stone to find the PCI/
> PCI bridge, if present.
>
> Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Applied to my for-linus branch, thanks.
--
Jesse Barnes, Intel Open Source Technology Center
prev parent reply other threads:[~2010-05-28 19:25 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-26 10:21 [PATCH] PCI quirk: AMD 780: work around wrong vendor ID on APC bridge Clemens Ladisch
2010-05-26 11:38 ` Matthew Wilcox
2010-05-28 19:25 ` Jesse Barnes [this message]
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