[PATCH v2 1/7] iommufd: Assert devices_lock for iommufd_hw_pagetable_has_group()

Jason Gunthorpe
2023-02-22T21:02:49Z

The hwpt->devices list is locked by this, make it clearer.

Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
drivers/iommu/iommufd/device.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/iommu/iommufd/device.c b/drivers/iommu/iommufd/device.c
index a0c66f47a65ada..dcfaf6567420e0 100644
--- a/drivers/iommu/iommufd/device.c
+++ b/drivers/iommu/iommufd/device.c
@@ -186,6 +186,8 @@ static bool iommufd_hw_pagetable_has_group(struct iommufd_hw_pagetable *hwpt,
{
struct iommufd_device *cur_dev;

+ lockdep_assert_held(&hwpt->devices_lock);
+
list_for_each_entry(cur_dev, &hwpt->devices, devices_item)
if (cur_dev->group == group)
return true;
--
2.39.1