Re: [PATCH v4 01/15] iommu/arm-smmu-v3: Disable the impl before disabling the SMMU on shutdown

[Jonathan Cameron]

> arm_smmu_device_shutdown() only calls arm_smmu_device_disable(), and never
> the impl_ops->device_disable() hook. On tegra241-cmdqv, that hook quiesces
> every VINTF through tegra241_vintf_hw_deinit(), which issues a CMD_SYNC on
> the shared CMDQ while it is still enabled.
> 
> arm_smmu_disable_action() already runs this hook before disabling the SMMU,
> to cover an unbind or a probe failure, and no devres release ever follows a
> reboot or a kexec to run it again. Have arm_smmu_device_shutdown() call it
> directly, instead of reimplementing part of what it already does.
> 
> Fixes: 9ff145a25c5c ("iommu/tegra241-cmdqv: Fix CMD_SYNC use-after-free on teardown")
> Cc: stable@xxxxxxxxxxxxxxx
> Assisted-by: Claude:claude-sonnet-5
Assisted-by: LLM

See Documetation/process changes around this. Personally I don't care
either way.

Otherwise fix makes sense to me.
Reviewed-by: Jonathan Cameron <jonathan.cameron@xxxxxxxxxxxxxxxx>

-- 
Jonathan Cameron <jonathan.cameron@xxxxxxxxxxxxxxxx>