Re: [PATCH v5 02/15] iommu/arm-smmu-v3: Add arm_smmu_attach_release()

On Tue, 15 Sep 2026 09:38:14 -0700, Nicolin Chen [off-list ref] wrote:

The IOPF teardown is done in arm_smmu_remove_master_domain() when releasing
the master_domain on detach, under the global arm_smmu_asid_lock mutex.

A later change will add an IOPF workqueue flush to that teardown, which can
block on a user-faulting page-fault handler. Holding the arm_smmu_asid_lock
across it would stall every unrelated attachment in the system.

[...]

Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>

-- 
Jason