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

[Jesse Barnes <jbarnes@virtuousgeek.org>]

On Wed, 13 Jul 2011 10:14:33 -0700
Chris Wright <chrisw@sous-sol.org> 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.


Thanks Chris, your earlier one is still sitting in my queue, but I
wasn't going to send it for 3.0 as it didn't seem that critical.  Do
you think it is?  If so you can send it directly to Linus with my ack
as I don't have anything else queued, or just wait until the merge
window when it will be put into the stable tree as well.

Thanks,
Jesse