ACPICA: Add support for region address conflict checking

Allows drivers to determine if any memory or I/O addresses
will conflict with addresses used by ACPI operation regions.
Introduces a new interface, acpi_check_address_range.

http://marc.info/?t=132251388700002&r=1&w=2

Reported-and-tested-by: Luca Tettamanti <kronos.it@gmail.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 10 insertions, 20 deletions

diff --git a/drivers/acpi/acpica/dsargs.c b/drivers/acpi/acpica/dsargs.c
index d69e4a53175b..19c2be941e78 100644
--- a/drivers/acpi/acpica/dsargs.c
+++ b/drivers/acpi/acpica/dsargs.c
@@ -250,6 +250,13 @@ acpi_ds_get_bank_field_arguments(union acpi_operand_object *obj_desc)
         status = acpi_ds_execute_arguments(node, node->parent,
                                            extra_desc->extra.aml_length,
                                            extra_desc->extra.aml_start);
+        if (ACPI_FAILURE(status)) {
+                return_ACPI_STATUS(status);
+        }
+
+        status = acpi_ut_add_address_range(obj_desc->region.space_id,
+                                           obj_desc->region.address,
+                                           obj_desc->region.length, node);
         return_ACPI_STATUS(status);
 }
 
@@ -391,25 +398,8 @@ acpi_status acpi_ds_get_region_arguments(union acpi_operand_object *obj_desc)
                 return_ACPI_STATUS(status);
         }
 
-        /* Validate the region address/length via the host OS */
-
-        status = acpi_os_validate_address(obj_desc->region.space_id,
-                                          obj_desc->region.address,
-                                          (acpi_size) obj_desc->region.length,
-                                          acpi_ut_get_node_name(node));
-
-        if (ACPI_FAILURE(status)) {
-                /*
-                 * Invalid address/length. We will emit an error message and mark
-                 * the region as invalid, so that it will cause an additional error if
-                 * it is ever used. Then return AE_OK.
-                 */
-                ACPI_EXCEPTION((AE_INFO, status,
-                                "During address validation of OpRegion [%4.4s]",
-                                node->name.ascii));
-                obj_desc->common.flags |= AOPOBJ_INVALID;
-                status = AE_OK;
-        }
-
+        status = acpi_ut_add_address_range(obj_desc->region.space_id,
+                                           obj_desc->region.address,
+                                           obj_desc->region.length, node);
         return_ACPI_STATUS(status);
 }