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Subject[PATCH v2 5/7] iommu/vt-d: Handle PCI bridge RMRR device scopes in intel_iommu_get_resv_regions
Date
In the case the RMRR device scope is a PCI-PCI bridge, let's check
the device belongs to the PCI sub-hierarchy.

Fixes: 0659b8dc45a6 ("iommu/vt-d: Implement reserved region get/put callbacks")

Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
drivers/iommu/intel-iommu.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 7ed820e79313..a36604f4900f 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -5496,7 +5496,8 @@ static void intel_iommu_get_resv_regions(struct device *device,
struct iommu_resv_region *resv;
size_t length;

- if (i_dev != device)
+ if (i_dev != device &&
+ !is_downstream_to_pci_bridge(device, i_dev))
continue;

length = rmrr->end_address - rmrr->base_address + 1;
--
2.20.1
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