diff options
| author | Jason Gunthorpe <jgg@nvidia.com> | 2023-03-01 22:30:19 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2023-03-06 17:51:56 +0300 |
| commit | 7214c1c85fe464929e9c32f90f81d65cd44b8ff6 (patch) | |
| tree | bb1aa2902ff760c27a2d1f028711ed57c5d8e3dd /drivers/iommu/iommufd | |
| parent | 085fcc7eb759c2b483f85b322e8c5146610010fd (diff) | |
| download | linux-7214c1c85fe464929e9c32f90f81d65cd44b8ff6.tar.xz | |
iommufd: Add iommufd_lock_obj() around the auto-domains hwpts
A later patch will require this locking - currently under the ioas mutex
the hwpt can not have a 0 reference and be on the list.
Link: https://lore.kernel.org/r/2-v3-ae9c2975a131+2e1e8-iommufd_hwpt_jgg@nvidia.com
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/iommu/iommufd')
| -rw-r--r-- | drivers/iommu/iommufd/device.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/iommu/iommufd/device.c b/drivers/iommu/iommufd/device.c index dcfaf6567420..0a80ff7b2e0d 100644 --- a/drivers/iommu/iommufd/device.c +++ b/drivers/iommu/iommufd/device.c @@ -282,7 +282,10 @@ static int iommufd_device_auto_get_domain(struct iommufd_device *idev, if (!hwpt->auto_domain) continue; + if (!iommufd_lock_obj(&hwpt->obj)) + continue; rc = iommufd_device_do_attach(idev, hwpt); + iommufd_put_object(&hwpt->obj); /* * -EINVAL means the domain is incompatible with the device. |