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| author | Andre Przywara <andre.przywara@arm.com> | 2020-04-01 11:27:24 +0100 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2020-04-01 13:51:51 -0600 |
| commit | f44efca0493ddc1e8731047c234ec8e475943077 (patch) | |
| tree | 899f176f70b34d03b8cde5a86b2a74af1720fe4a /drivers/vfio | |
| parent | 00bc5095547ef9878324167fe0c3e56f7b388159 (diff) | |
| download | linux-f44efca0493ddc1e8731047c234ec8e475943077.tar.gz linux-f44efca0493ddc1e8731047c234ec8e475943077.tar.bz2 linux-f44efca0493ddc1e8731047c234ec8e475943077.zip | |
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: f6810c15cf973f ("iommu/arm-smmu: Clean up early-probing workarounds")
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Acked-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'drivers/vfio')
| -rw-r--r-- | drivers/vfio/vfio_iommu_type1.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c index 9fdfae1cb17a..85b32c325282 100644 --- a/drivers/vfio/vfio_iommu_type1.c +++ b/drivers/vfio/vfio_iommu_type1.c @@ -1787,7 +1787,7 @@ static int vfio_iommu_type1_attach_group(void *iommu_data, if (resv_msi) { ret = iommu_get_msi_cookie(domain->domain, resv_msi_base); - if (ret) + if (ret && ret != -ENODEV) goto out_detach; } |