[ACPICA] Update to version 20181003. CORE-15222

[reactos.git] / drivers / bus / acpi / acpica / events / evregion.c

diff --git a/drivers/bus/acpi/acpica/events/evregion.c b/drivers/bus/acpi/acpica/events/evregion.c
index 390de5a..9cee492 100644 (file)
--- a/drivers/bus/acpi/acpica/events/evregion.c
+++ b/drivers/bus/acpi/acpica/events/evregion.c
@@ -730,6 +730,20 @@ AcpiEvExecuteRegMethods (
 
     ACPI_FUNCTION_TRACE (EvExecuteRegMethods);
 
+    /*
+     * These address spaces do not need a call to _REG, since the ACPI
+     * specification defines them as: "must always be accessible". Since
+     * they never change state (never become unavailable), no need to ever
+     * call _REG on them. Also, a DataTable is not a "real" address space,
+     * so do not call _REG. September 2018.
+     */
+    if ((SpaceId == ACPI_ADR_SPACE_SYSTEM_MEMORY) ||
+        (SpaceId == ACPI_ADR_SPACE_SYSTEM_IO) ||
+        (SpaceId == ACPI_ADR_SPACE_DATA_TABLE))
+    {
+        return_VOID;
+    }
+
     Info.SpaceId = SpaceId;
     Info.Function = Function;
     Info.RegRunCount = 0;
@@ -796,8 +810,8 @@ AcpiEvRegRun (
     }
 
     /*
-     * We only care about regions.and objects that are allowed to have address
-     * space handlers
+     * We only care about regions and objects that are allowed to have
+     * address space handlers
      */
     if ((Node->Type != ACPI_TYPE_REGION) &&
         (Node != AcpiGbl_RootNode))