ACPICA: Add support for module-level executable AML code

Add limited support for executable AML code that exists outside
of any control method. This type of code has been illegal since
ACPI 2.0.  The code must exist in an If/Else/While block. All AML
tables are supported, including tables that are dynamically loaded.
ACPICA BZ 762.

http://acpica.org/bugzilla/show_bug.cgi?id=762

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, 12 insertions, 6 deletions

diff --git a/drivers/acpi/acpica/dsfield.c b/drivers/acpi/acpica/dsfield.c
index 53e27bc5a734..54a225e56a64 100644
--- a/drivers/acpi/acpica/dsfield.c
+++ b/drivers/acpi/acpica/dsfield.c
@@ -123,9 +123,12 @@ acpi_ds_create_buffer_field(union acpi_parse_object *op,
                 flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE |
                     ACPI_NS_ERROR_IF_FOUND;
 
-                /* Mark node temporary if we are executing a method */
-
-                if (walk_state->method_node) {
+                /*
+                 * Mark node temporary if we are executing a normal control
+                 * method. (Don't mark if this is a module-level code method)
+                 */
+                if (walk_state->method_node &&
+                    !(walk_state->parse_flags & ACPI_PARSE_MODULE_LEVEL)) {
                         flags |= ACPI_NS_TEMPORARY;
                 }
 
@@ -456,9 +459,12 @@ acpi_ds_init_field_objects(union acpi_parse_object *op,
         flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE |
             ACPI_NS_ERROR_IF_FOUND;
 
-        /* Mark node(s) temporary if we are executing a method */
-
-        if (walk_state->method_node) {
+        /*
+         * Mark node(s) temporary if we are executing a normal control
+         * method. (Don't mark if this is a module-level code method)
+         */
+        if (walk_state->method_node &&
+            !(walk_state->parse_flags & ACPI_PARSE_MODULE_LEVEL)) {
                 flags |= ACPI_NS_TEMPORARY;
         }