> From: Lu Baolu <baolu...@linux.intel.com>
> Sent: Saturday, June 25, 2022 8:52 PM
> In the IOMMU hot-add path, there's a need to check whether an IOMMU
> has been probed. Instead of checking the IOMMU pointer in the global
> list, it's better to allocate a flag bit in iommu->flags for this
> purpose.

Sorry I didn't get the point of original check. This is the hotplug path
hence the caller of this function should already figure out it's a new
iommu before reaching this point?

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