> From: Lu Baolu <baolu...@linux.intel.com>
> Sent: Wednesday, June 29, 2022 3:47 PM
> The disable_dmar_iommu() is called when IOMMU initialization fails or
> the IOMMU is hot-removed from the system. In both cases, there is no
> need to clear the IOMMU translation data structures for devices.
> On the initialization path, the device probing only happens after the
> IOMMU is initialized successfully, hence there're no translation data
> structures.
> On the hot-remove path, there is no real use case where the IOMMU is
> hot-removed, but the devices that it manages are still alive in the
> system. The translation data structures were torn down during device
> release, hence there's no need to repeat it in IOMMU hot-remove path
> either. This removes the unnecessary code and only leaves a check.
> Signed-off-by: Lu Baolu <baolu...@linux.intel.com>

You probably overlooked my last comment on kexec:


I think my question is still not answered.
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