Fix device assignment on ARM after 91d4eca7 "mm / iommu: split
need_iommu() into has_iommu_pt() and need_iommu_pt_sync()".
arch_iommu_populate_page_table returns -ENOSYS which causes
iommu_construct to return early, although it is not an error.
Interestingly, the if ( rc ) was present even before 91d4eca7, but it was
still working before. Now, with the new hd->status field it won't
complete the initialization successfully.
Signed-off-by: Stefano Stabellini <stefa...@xilinx.com>
diff --git a/xen/drivers/passthrough/iommu.c b/xen/drivers/passthrough/iommu.c
index ac62d7f..a63329b 100644
--- a/xen/drivers/passthrough/iommu.c
+++ b/xen/drivers/passthrough/iommu.c
@@ -269,7 +269,7 @@ int iommu_construct(struct domain *d)
hd->need_sync = true;
rc = arch_iommu_populate_page_table(d);
- if ( rc )
+ if ( rc != 0 && rc != -ENOSYS )
{
if ( rc != -ERESTART )
{
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