tree 0c041f99606ff705ca5e7619d1fde217ce200f53
parent d7fcb303d1ee4416a6e4772735cfacc36e86bff7
author Robin Murphy <robin.murphy@arm.com> 1489683617 +0000
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1499258430 +0200

iommu/dma: Don't reserve PCI I/O windows

commit 938f1bbe35e3a7cb07e1fa7c512e2ef8bb866bdf upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>