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iommu: Mark dev_iommu_get() with lockdep

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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 <jsnitsel@redhat.com>
Tested-by: Hector Martin <marcan@marcan.st>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Moritz Fischer <moritzf@google.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/4-v2-16e4def25ebb+820-iommu_fwspec_p1_jgg@nvidia.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Jason Gunthorpe 2023-12-07 14:03:11 -04:00 committed by Joerg Roedel
parent 5b4ea8b06e
commit 64945d1b0e
1 changed files with 2 additions and 0 deletions
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2
drivers/iommu/iommu.c
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@ -334,6 +334,8 @@ 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;