Re: [Patch Part3 V3 00/21] Enable support of Intel DMAR device hotplug

>   iommu/vt-d: match segment number when searching for dev_iotlb capable
>     devices
>   iommu/vt-d: use correct domain id to flush virtual machine domains
>   iommu/vt-d: introduce helper functions to improve code readability
>   iommu/vt-d: introduce helper functions to make code symmetric for
>     readability
>   iommu/vt-d: only dynamically allocate domain id for virtual domains
>   iommu/vt-d: fix possible invalid memory access caused by
>     free_dmar_iommu()
>   iommu/vt-d: avoid freeing virtual machine domain in free_dmar_iommu()
>   iommu/VT-d: simplify include/linux/dmar.h
>   iommu/vt-d: change iommu_enable/disable_translation to return void
>   iommu/vt-d: simplify intel_unmap_sg() and kill duplicated code
>   iommu/vt-d: introduce helper domain_pfn_within_range() to simplify
>     code
>   iommu/vt-d: introduce helper function iova_size() to improve code
>     readability
>   iommu/vt-d: fix bug in computing domain's iommu_snooping flag
>   IOMMU/vt-d: introduce helper function dmar_walk_resources()
>   iommu/vt-d: dynamically allocate and free seq_id for DMAR units
>   iommu/vt-d: implement DMAR unit hotplug framework
>   iommu/vt-d: search _DSM method for DMAR hotplug
>   iommu/vt-d: enhance intel_irq_remapping driver to support DMAR unit
>     hotplug
>   iommu/vt-d: enhance error recovery in function
>     intel_enable_irq_remapping()
>   iommu/vt-d: enhance intel-iommu driver to support DMAR unit hotplug
>   pci, ACPI, iommu: enhance pci_root to support DMAR device hotplug

This looks a little sloppy; you have three different ways of
capitalizing the area:

  iommu/vt-d:
  iommu/VT-d:
  IOMMU/vt-d:

Also, "git log --oneline drivers/iommu" says that the convention for
drivers/iommu is to capitalize the first word of the rest of the
subject line.