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authorRobin Murphy <robin.murphy@arm.com>2017-03-16 20:00:17 +0300
committerJoerg Roedel <jroedel@suse.de>2017-03-22 18:18:59 +0300
commit938f1bbe35e3a7cb07e1fa7c512e2ef8bb866bdf (patch)
tree87845f65679cf87a1c5eabbaf945df8781d8fc43 /drivers/iommu/dma-iommu.c
parent9d3a4de4cb8db8e71730e36736272ef041836f68 (diff)
downloadlinux-938f1bbe35e3a7cb07e1fa7c512e2ef8bb866bdf.tar.xz
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: fade1ec055dc ("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>
Diffstat (limited to 'drivers/iommu/dma-iommu.c')
-rw-r--r--drivers/iommu/dma-iommu.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index 48d36ce59efb..1e0983488a8d 100644
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -175,8 +175,7 @@ static void iova_reserve_pci_windows(struct pci_dev *dev,
unsigned long lo, hi;
resource_list_for_each_entry(window, &bridge->windows) {
- if (resource_type(window->res) != IORESOURCE_MEM &&
- resource_type(window->res) != IORESOURCE_IO)
+ if (resource_type(window->res) != IORESOURCE_MEM)
continue;
lo = iova_pfn(iovad, window->res->start - window->offset);