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| author | Jason Gunthorpe <jgg@nvidia.com> | 2023-12-07 14:03:11 -0400 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2023-12-12 10:18:48 +0100 |
| commit | 64945d1b0ed169aeffa59020941e4ac45ebc315a (patch) | |
| tree | 82eb65a22706e60be14eacad0cb5d22e5f17a584 /drivers/iommu/iommu.c | |
| parent | 5b4ea8b06eb79234a244ffc1f7405aa968f62069 (diff) | |
| download | lwn-64945d1b0ed169aeffa59020941e4ac45ebc315a.tar.gz lwn-64945d1b0ed169aeffa59020941e4ac45ebc315a.zip | |
iommu: Mark dev_iommu_get() with lockdep
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>
Diffstat (limited to 'drivers/iommu/iommu.c')
| -rw-r--r-- | drivers/iommu/iommu.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index d0a28667479a..df58025c001b 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -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; |