[xen stable-4.14] VT-d: PCI segment numbers are up to 16 bits wide

[patchbot@xxxxxxx]

commit d53afcdcb33a2724303dfd789eafcb830120d3b8
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Fri Oct 15 11:17:56 2021 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Fri Oct 15 11:17:56 2021 +0200

    VT-d: PCI segment numbers are up to 16 bits wide
    
    We shouldn't silently truncate respective values.
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>
    master commit: a3dd33e63c2c8c51102f223e6efe2e3d3bdcbec1
    master date: 2021-09-20 10:25:03 +0200
---
 xen/drivers/passthrough/vtd/iommu.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/xen/drivers/passthrough/vtd/iommu.c 
b/xen/drivers/passthrough/vtd/iommu.c
index 70cfe9dc1f..870996abdb 100644
--- a/xen/drivers/passthrough/vtd/iommu.c
+++ b/xen/drivers/passthrough/vtd/iommu.c
@@ -1486,7 +1486,8 @@ static int domain_context_mapping(struct domain *domain, 
u8 devfn,
 {
     struct acpi_drhd_unit *drhd;
     int ret = 0;
-    u8 seg = pdev->seg, bus = pdev->bus, secbus;
+    uint16_t seg = pdev->seg;
+    uint8_t bus = pdev->bus, secbus;
 
     drhd = acpi_find_matched_drhd_unit(pdev);
     if ( !drhd )
@@ -1700,7 +1701,8 @@ static int domain_context_unmap(struct domain *domain, u8 
devfn,
     struct acpi_drhd_unit *drhd;
     struct vtd_iommu *iommu;
     int ret = 0;
-    u8 seg = pdev->seg, bus = pdev->bus, tmp_bus, tmp_devfn, secbus;
+    uint16_t seg = pdev->seg;
+    uint8_t bus = pdev->bus, tmp_bus, tmp_devfn, secbus;
     bool found;
 
     drhd = acpi_find_matched_drhd_unit(pdev);
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.14