linux-kernel - Re: [PATCH v3 2/2] PCI Hotplug: acpiphp: get pci

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Message-ID: <20090724143827.31b4c37d@jbarnes-g45>
Date:	Fri, 24 Jul 2009 14:38:27 -0700
From:	Jesse Barnes <jesse.barnes@...el.com>
To:	Alex Chiang <achiang@...com>
Cc:	lenb@...nel.org, linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org
Subject: Re: [PATCH v3 2/2] PCI Hotplug: acpiphp: get pci_bus from acpi
 handle correctly

On Thu, 23 Jul 2009 17:03:05 -0600
Alex Chiang <achiang@...com> wrote:

> We cannot simply call acpi_get_pci_dev() on any random ACPI handle
> and hope that it works, because a PCI root bridge may not have
> an associated struct pci_dev.
> 
> This is allowed per the PCI specification, and is referred to as a
> non-materialized bridge.
> 
> So, depending on the type of PCI bridge that the handle points to,
> use the appropriate interface to return the struct pci_bus correctly.
> 
> Signed-off-by: Alex Chiang <achiang@...com>
> ---

I put these in my linux-next branch, just because I'm really
conservative about the current release.

If we hear of boxes in the wild getting bitten by the non-materialized
bit, we can push this set back to stable.

-- 
Jesse Barnes, Intel Open Source Technology Center
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