intel-iommu: Handle PCI domains appropriately.

We were comparing {bus,devfn} and assuming that a match meant it was the
same device. It doesn't -- the same {bus,devfn} can exist in
multiple PCI domains. Include domain number in device identification
(and call it 'segment' in most places, because there's already a lot of
references to 'domain' which means something else, and this code is
infected with ACPI thinking already).

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/pci/dmar.c b/drivers/pci/dmar.c
index 3fbe6af7ad71..25a00ce4f24d 100644
--- a/drivers/pci/dmar.c
+++ b/drivers/pci/dmar.c
@@ -180,6 +180,7 @@ dmar_parse_one_drhd(struct acpi_dmar_header *header)
         dmaru->hdr = header;
         drhd = (struct acpi_dmar_hardware_unit *)header;
         dmaru->reg_base_addr = drhd->address;
+        dmaru->segment = drhd->segment;
         dmaru->include_all = drhd->flags & 0x1; /* BIT0: INCLUDE_ALL */
 
         ret = alloc_iommu(dmaru);