1 files changed, 15 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/nsinit.c b/drivers/acpi/acpica/nsinit.c
index 2adfcf329e15..1d5b360eb25b 100644
--- a/drivers/acpi/acpica/nsinit.c
+++ b/drivers/acpi/acpica/nsinit.c
@@ -170,6 +170,21 @@ acpi_status acpi_ns_initialize_devices(void)
                 goto error_exit;
         }
 
+        /*
+         * Execute the "global" _INI method that may appear at the root. This
+         * support is provided for Windows compatibility (Vista+) and is not
+         * part of the ACPI specification.
+         */
+        info.evaluate_info->prefix_node = acpi_gbl_root_node;
+        info.evaluate_info->pathname = METHOD_NAME__INI;
+        info.evaluate_info->parameters = NULL;
+        info.evaluate_info->flags = ACPI_IGNORE_RETURN_VALUE;
+
+        status = acpi_ns_evaluate(info.evaluate_info);
+        if (ACPI_SUCCESS(status)) {
+                info.num_INI++;
+        }
+
         /* Walk namespace to execute all _INIs on present devices */
 
         status = acpi_ns_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,