forked from luck/tmp_suning_uos_patched
iommu/dma: Don't reserve PCI I/O windows
Even if a host controller's CPU-side MMIO windows into PCI I/O space do
happen to leak into PCI memory space such that it might treat them as
peer addresses, trying to reserve the corresponding I/O space addresses
doesn't do anything to help solve that problem. Stop doing a silly thing.
Fixes: fade1ec055
("iommu/dma: Avoid PCI host bridge windows")
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
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parent
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@ -175,8 +175,7 @@ static void iova_reserve_pci_windows(struct pci_dev *dev,
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unsigned long lo, hi;
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resource_list_for_each_entry(window, &bridge->windows) {
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if (resource_type(window->res) != IORESOURCE_MEM &&
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resource_type(window->res) != IORESOURCE_IO)
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if (resource_type(window->res) != IORESOURCE_MEM)
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continue;
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lo = iova_pfn(iovad, window->res->start - window->offset);
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