intel-iommu: Remove Host Bridge devices from identity mapping
When using the 1:1 (identity) PCI DMA remapping, PCI Host Bridge devices that do not use the IOMMU causes a kernel panic. Fix that by not inserting those devices into the si_domain. Signed-off-by: Mike Travis <travis@sgi.com> Reviewed-by: Mike Habeck <habeck@sgi.com> Cc: stable@kernel.org Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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