This patch adds support to setup DMA coherency for PCI device using
the ACPI _CCA attribute. According to the ACPI spec, the _CCA attribute
is required for ARM64. Therefore, this patch is a pre-req for ACPI PCI
support for ARM64 which is currently in development.

Also, this should not affect other architectures that does not define 
CONFIG_ACPI_CCA_REQUIRED, since the default value is coherent.

In the V2 of this patch series, I have pulled in the following patch from Jeremy
before cleaning up the acpi_check_dma() function (in patch 2).

    http://www.spinics.net/lists/linux-usb/msg128582.html)

Changes from V1: (https://lkml.org/lkml/2015/8/13/182)
    * Include patch 1 from Jeremy to enable support for _CCA=0
    * Clean up acpi_check_dma() per Bjorn suggestions
    * Split the original V1 patch into two patches (patch 3 and 4)

Jeremy Linton (1):
  Honor ACPI _CCA attribute setting

Suravee Suthikulpanit (3):
  ACPI/scan: Clean up acpi_check_dma
  PCI: OF: Move of_pci_dma_configure() to pci_dma_configure()
  PCI: ACPI: Add support for PCI device DMA coherency

 drivers/acpi/acpi_platform.c |  7 ++++++-
 drivers/acpi/glue.c          |  5 +++--
 drivers/acpi/scan.c          | 39 +++++++++++++++++++++++++++++++++++++++
 drivers/base/property.c      |  8 ++++++--
 drivers/of/of_pci.c          | 20 --------------------
 drivers/pci/probe.c          | 32 ++++++++++++++++++++++++++++++--
 include/acpi/acpi_bus.h      | 35 ++---------------------------------
 include/linux/acpi.h         |  4 ++--
 include/linux/of_pci.h       |  3 ---
 9 files changed, 88 insertions(+), 65 deletions(-)

-- 
2.1.0