RE: [PATCH v1 4/6] iommu/vt-d: Add VTD_FLAG_IOMMU_PROBED flag

[Tian, Kevin]

> From: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>
> 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?