This only needs to be done once per group, not once per device. The once
per device was a way to make the device list work. Since we are abandoning
this we can optimize things a bit.
Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>
Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
---
drivers/iommu/iommufd/device.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/iommu/iommufd/device.c b/drivers/iommu/iommufd/device.c
index 4566833494e076..7f063b679a24be 100644
--- a/drivers/iommu/iommufd/device.c
+++ b/drivers/iommu/iommufd/device.c
@@ -315,10 +315,6 @@ int iommufd_hw_pagetable_attach(struct iommufd_hw_pagetable *hwpt,
if (rc)
return rc;
- rc = iommufd_device_setup_msi(idev, hwpt, sw_msi_start);
- if (rc)
- goto err_unresv;
-
/*
* Only attach to the group once for the first device that is in the
* group. All the other devices will follow this attachment. The user
@@ -326,6 +322,10 @@ int iommufd_hw_pagetable_attach(struct iommufd_hw_pagetable *hwpt,
* regions are only updated during individual device attachment.
*/
if (list_empty(&idev->igroup->device_list)) {
+ rc = iommufd_device_setup_msi(idev, hwpt, sw_msi_start);
+ if (rc)
+ goto err_unresv;
+
rc = iommu_attach_group(hwpt->domain, idev->igroup->group);
if (rc)
goto err_unresv;
--
2.40.0
