Re: [PATCH resend] pci: ARI is a PCIe v2 feature

From: Jesse Barnes
Date: Fri Jul 22 2011 - 11:44:21 EST

On Wed, 13 Jul 2011 10:14:33 -0700
Chris Wright <chrisw@xxxxxxxxxxxx> wrote:

> The function pci_enable_ari() may mistakenly set the downstream port
> of a v1 PCIe switch in ARI Forwarding mode. This is a PCIe v2 feature,
> and with an SR-IOV device on that switch port believing the switch above
> is ARI capable it may attempt to use functions 8-255, translating into
> invalid (non-zero) device numbers for that bus. This has been seen
> to cause Completion Timeouts and general misbehaviour including hangs
> and panics.

Applied, thanks.

Jesse Barnes, Intel Open Source Technology Center
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