[PATCH 0/3] pci/iommu: Quirk non-compliant PCIe-to-PCI bridges

[Alex Williamson <alex.williamson-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>]

This series tries to address:

https://bugzilla.kernel.org/show_bug.cgi?id=44881

Where pci_find_upstream_pcie_bridge() gets lost trying to find the
upstream PCIe-to-PCI bridge for a device because the bridge doesn't
expose a PCIe capability.  To do this, we add a pci_is_pcie_bridge
function which includes a quirk to look to the next upstream device
as a sanity check.  We can then replace pci_find_upstream_pcie_bridge
with a function that's a bit more generic and less tied to intel-iommu
eccentricities.

This works on my VT-d system, but I don't have any of the offending
bridges.  Appreciate testing from those who do.  I'll link this series
to the bz above for more testing.  Thanks,

Alex

---

Alex Williamson (3):
      pci: Add PCI walk function and PCIe bridge test
      intel-iommu: Convert to pci_walk_up_to_first_match
      pci: Remove pci_find_pcie_upstream_bridge


 drivers/iommu/intel-iommu.c         |   77 ++++++++++++++++++++++-------------
 drivers/iommu/intel_irq_remapping.c |   13 ++++--
 drivers/pci/search.c                |   74 ++++++++++++++++++++++------------
 include/linux/pci.h                 |   26 +++++++++---
 4 files changed, 124 insertions(+), 66 deletions(-)