From: Chris Wright <chrisw@sous-sol.org>
Date: Wed, 13 Jul 2011 17:14:33 +0000 (-0700)
Subject: PCI: ARI is a PCIe v2 feature
X-Git-Tag: v3.1-rc1~122^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=864d296cf948aef0fa32b81407541572583f7572;p=pandora-kernel.git

PCI: ARI is a PCIe v2 feature

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.

Cc: stable@kernel.org
Acked-by: Don Dutile <ddutile@redhat.com>
Tested-by: Don Dutile <ddutile@redhat.com>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
---

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