Commit f44efca0 authored by Andre Przywara's avatar Andre Przywara Committed by Alex Williamson

vfio: Ignore -ENODEV when getting MSI cookie

When we try to get an MSI cookie for a VFIO device, that can fail if
CONFIG_IOMMU_DMA is not set. In this case iommu_get_msi_cookie() returns
-ENODEV, and that should not be fatal.

Ignore that case and proceed with the initialisation.

This fixes VFIO with a platform device on the Calxeda Midway (no MSIs).

Fixes: f6810c15 ("iommu/arm-smmu: Clean up early-probing workarounds")
Signed-off-by: default avatarAndre Przywara <andre.przywara@arm.com>
Acked-by: default avatarRobin Murphy <robin.murphy@arm.com>
Reviewed-by: default avatarEric Auger <eric.auger@redhat.com>
Signed-off-by: default avatarAlex Williamson <alex.williamson@redhat.com>
parent 00bc5095
...@@ -1787,7 +1787,7 @@ static int vfio_iommu_type1_attach_group(void *iommu_data, ...@@ -1787,7 +1787,7 @@ static int vfio_iommu_type1_attach_group(void *iommu_data,
if (resv_msi) { if (resv_msi) {
ret = iommu_get_msi_cookie(domain->domain, resv_msi_base); ret = iommu_get_msi_cookie(domain->domain, resv_msi_base);
if (ret) if (ret && ret != -ENODEV)
goto out_detach; goto out_detach;
} }
......
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