[PATCH RFC 17/17] iommu: Mark dev_iommu_priv_set() with a lockdep

[Baolu Lu]

On 2023/11/4 0:45, Jason Gunthorpe wrote:
> A perfect driver would only call dev_iommu_priv_set() from its probe
> callback. We've made it functionally correct to call it from the of_xlate
> by adding a lock around that call.
> 
> lockdep assert that iommu_probe_device_lock is held to discourage misuse.
> 
> Exclude PPC kernels with CONFIG_FSL_PAMU turned on because FSL_PAMU uses a
> global static for its priv and abuses priv for its domain.
> 
> Remove the pointless stores of NULL, all these are on paths where the core
> code will free dev->iommu after the op returns.
> 
> Signed-off-by: Jason Gunthorpe<jgg at nvidia.com>
> ---
>   drivers/iommu/amd/iommu.c                   | 2 --
>   drivers/iommu/apple-dart.c                  | 1 -
>   drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 1 -
>   drivers/iommu/arm/arm-smmu/arm-smmu.c       | 1 -
>   drivers/iommu/intel/iommu.c                 | 2 --
>   drivers/iommu/iommu.c                       | 9 +++++++++
>   drivers/iommu/omap-iommu.c                  | 1 -
>   include/linux/iommu.h                       | 5 +----
>   8 files changed, 10 insertions(+), 12 deletions(-)

Reviewed-by: Lu Baolu <baolu.lu at linux.intel.com>

Best regards,
baolu