linux-kernel - [PATCH 0/2] Fix ACS path checking

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Message-ID: <20120804180155.6144.83332.stgit@bling.home>
Date:	Sat, 04 Aug 2012 12:08:46 -0600
From:	Alex Williamson <alex.williamson@...hat.com>
To:	joerg.roedel@....com, dwmw2@...radead.org
Cc:	iommu@...ts.linux-foundation.org, linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org, dsahern@...il.com
Subject: [PATCH 0/2] Fix ACS path checking

David Ahern reported an oops caused by passing a NULL start device
to pci_acs_path_enabled().  This can happen when a bus is created
for sr-iov devices without an associated bridge.  To handle this,
skip over to the parent bus and look for a bridge there.  Continue
until we find something or reach the root bus.

This works on my system, but still needs to be tested by David.  I'd
like to get this in for 3.6-rc2.

Joerg, I notice that ACS isn't getting enabled on my AMD system on
3.6-rc1.  I'll investigate more, but mention it in case you get to
it first.  Thanks,

Alex

---

Alex Williamson (2):
      amd-iommu: Fix ACS path checking
      intel-iommu: Fix ACS path checking

 drivers/iommu/amd_iommu.c   |   25 ++++++++++++++++++++++---
 drivers/iommu/intel-iommu.c |   25 ++++++++++++++++++++++---
 2 files changed, 44 insertions(+), 6 deletions(-)
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