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iommufd: Move putting a hwpt to a helper function

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Next patch will need to call this from two places.

Link: https://lore.kernel.org/r/8-v8-6659224517ea+532-iommufd_alloc_jgg@nvidia.com
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Tested-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Jason Gunthorpe
2023-07-17 15:12:04 -03:00
parent 1d149ab2e0
commit d03f1336fd
2 changed files with 11 additions and 5 deletions
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6
drivers/iommu/iommufd/device.c
View File

@@ -526,11 +526,7 @@ void iommufd_device_detach(struct iommufd_device *idev)
struct iommufd_hw_pagetable *hwpt;
hwpt = iommufd_hw_pagetable_detach(idev);
if (hwpt->auto_domain)
iommufd_object_destroy_user(idev->ictx, &hwpt->obj);
else
refcount_dec(&hwpt->obj.users);
iommufd_hw_pagetable_put(idev->ictx, hwpt);
refcount_dec(&idev->obj.users);
}
EXPORT_SYMBOL_NS_GPL(iommufd_device_detach, IOMMUFD);

10
drivers/iommu/iommufd/iommufd_private.h
View File

@@ -260,6 +260,16 @@ struct iommufd_hw_pagetable *
iommufd_hw_pagetable_detach(struct iommufd_device *idev);
void iommufd_hw_pagetable_destroy(struct iommufd_object *obj);
static inline void iommufd_hw_pagetable_put(struct iommufd_ctx *ictx,
struct iommufd_hw_pagetable *hwpt)
{
lockdep_assert_not_held(&hwpt->ioas->mutex);
if (hwpt->auto_domain)
iommufd_object_destroy_user(ictx, &hwpt->obj);
else
refcount_dec(&hwpt->obj.users);
}
struct iommufd_group {
struct kref ref;
struct mutex lock;