[PATCH V4 0/4] Code refine for Intel IOMMU

[Wei Yang <richard.weiyang-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

These four patches try to refine the Intel IOMMU.                                                                                     
                                                                                                                                      
Patch 1/2 tries to make it more user friendly by add a zero-sized array in                                                            
some dmar data structure.                                                                                                             
Patch 3 move the ckeck of Register Base Address ahead to avoid cleanup when it                                                        
is NULL.                                                                                                                              
Patch 4 re-use dmar_walk_dmar_table() to make the code easy to understand.

V4:
  * add similar change for struct dmar_atsr_unit in patch 1
  * add similar change for rmrr and atsr in patch 2

V3:
  * change hdr to drhd from type acpi_dmar_header to acpi_dmar_hardware_unit 
  * add reason in changelog for the change in Patch 1

V2:
  * add patch 3 and 4

Wei Yang (4):
  iommu/vt-d: replace *hdr with {drhd/atsr}[0] in struct
    dmar_{drhd/atsr}_unit
  iommu/vt-d: use zero-sized array in DMAR related ACPI structures
  iommu/vt-d: check Register Base Address at the beginning of
    dmar_parse_one_drhd()
  iommu/vt-d: refine dmar_acpi_dev_scope_init() with
    dmar_walk_dmar_table()

 drivers/iommu/dmar.c                |  129 +++++++++++++++++------------------
 drivers/iommu/intel-iommu.c         |   26 +++----
 drivers/iommu/intel_irq_remapping.c |   10 ++-
 include/acpi/actbl2.h               |   33 +++++----
 include/linux/dmar.h                |    3 +-
 5 files changed, 102 insertions(+), 99 deletions(-)

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1.7.9.5