21 Apr
2023
21 Apr
'23
7:30 a.m.
From: Jason Gunthorpe jgg@nvidia.com Sent: Friday, April 21, 2023 2:51 AM
Due to the auto_domains mechanism the ioas->mutex must be held until the hwpt is completely setup by iommufd_object_abort_and_destroy() or iommufd_object_finalize().
This prevents a concurrent iommufd_device_auto_get_domain() from seeing an incompletely initialized object through the ioas->hwpt_list.
To make this more consistent move the unlock until after finalize.
Fixes: e8d57210035b ("iommufd: Add kAPI toward external drivers for physical devices") Signed-off-by: Jason Gunthorpe jgg@nvidia.com
Reviewed-by: Kevin Tian kevin.tian@intel.com