[v2,16/17] iommu: Mark dev_iommu_get() with lockdep

Commit Message

Jason Gunthorpe Nov. 15, 2023, 2:06 p.m. UTC

Allocation of dev->iommu must be done under the
iommu_probe_device_lock. Mark this with lockdep to discourage future
mistakes.

Reviewed-by: Jerry Snitselaar <[e-mail]>
Signed-off-by: Jason Gunthorpe <[e-mail]>
---
 drivers/iommu/iommu.c | 2 ++
 1 file changed, 2 insertions(+)

Patch

diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index de6dcb244bff4a..34c4b07a6aafae 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -345,6 +345,8 @@  static struct dev_iommu *dev_iommu_get(struct device *dev)
 {
 	struct dev_iommu *param = dev->iommu;
 
+	lockdep_assert_held(&iommu_probe_device_lock);
+
 	if (param)
 		return param;