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(-)
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