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iommufd: Avoid duplicated __iommu_group_set_core_domain() call

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For the fault-capable hwpts, the iommufd_hwpt_detach_device() calls both
iommufd_fault_domain_detach_dev() and iommu_detach_group(). This would have
duplicated __iommu_group_set_core_domain() call since both functions call
it in the end. This looks no harm as the __iommu_group_set_core_domain()
returns if the new domain equals to the existing one. But it makes sense to
avoid such duplicated calls in caller side.

Link: https://patch.msgid.link/r/20240908114256.979518-2-yi.l.liu@intel.com
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Yi Liu 2024-09-08 04:42:55 -07:00 committed by Jason Gunthorpe
parent 8f6887349b
commit d9dfb5e622
1 changed files with 3 additions and 1 deletions
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4
drivers/iommu/iommufd/iommufd_private.h
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@ -510,8 +510,10 @@ static inline int iommufd_hwpt_attach_device(struct iommufd_hw_pagetable *hwpt,
static inline void iommufd_hwpt_detach_device(struct iommufd_hw_pagetable *hwpt,
struct iommufd_device *idev)
{
if (hwpt->fault)
if (hwpt->fault) {
iommufd_fault_domain_detach_dev(hwpt, idev);
return;
}
iommu_detach_group(hwpt->domain, idev->igroup->group);
}