iommu/vt-d: Handle PCI bridge RMRR device scopes in intel_iommu_get_r…

…esv_regions In the case the RMRR device scope is a PCI-PCI bridge, let's check the device belongs to the PCI sub-hierarchy. Fixes: 0659b8d ("iommu/vt-d: Implement reserved region get/put callbacks") Signed-off-by: Eric Auger <[email protected]> Reviewed-by: Lu Baolu <[email protected]> Signed-off-by: Joerg Roedel <[email protected]>
jix · Jun 12, 2019 · 3855ba2 · 3855ba2
1 parent e143fd4
commit 3855ba2
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
@@ -5426,7 +5426,8 @@ 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;