ACPICA: Add deferred package support for the Load and loadTable operators

Completes the support and fixes a regression introduced in
version 20180209.

The regression caused package objects that were loaded by the Load and
loadTable operators. This created an error message like the following:

[    0.251922] ACPI Error: No pointer back to namespace node in package
00000000fd2a44cd (20180313/dsargs-303)

Link: https://bugzilla.kernel.org/show_bug.cgi?id=199413
Fixes: 5a8361f7ecce (ACPICA: Integrate package handling with module-level code)
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Erik Schmauss <erik.schmauss@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

3 files changed, 74 insertions, 20 deletions

diff --git a/drivers/acpi/acpica/acnamesp.h b/drivers/acpi/acpica/acnamesp.h
index 514aaf948ea9..3825df923480 100644
--- a/drivers/acpi/acpica/acnamesp.h
+++ b/drivers/acpi/acpica/acnamesp.h
@@ -56,6 +56,10 @@ acpi_status acpi_ns_initialize_objects(void);
 
 acpi_status acpi_ns_initialize_devices(u32 flags);
 
+acpi_status
+acpi_ns_init_one_package(acpi_handle obj_handle,
+                         u32 level, void *context, void **return_value);
+
 /*
  * nsload -  Namespace loading
  */
diff --git a/drivers/acpi/acpica/exconfig.c b/drivers/acpi/acpica/exconfig.c
index 99d92cb32803..f85c6f3271f6 100644
--- a/drivers/acpi/acpica/exconfig.c
+++ b/drivers/acpi/acpica/exconfig.c
@@ -174,6 +174,13 @@ acpi_ex_load_table_op(struct acpi_walk_state *walk_state,
                 return_ACPI_STATUS(status);
         }
 
+        /* Complete the initialization/resolution of package objects */
+
+        status = acpi_ns_walk_namespace(ACPI_TYPE_PACKAGE, ACPI_ROOT_OBJECT,
+                                        ACPI_UINT32_MAX, 0,
+                                        acpi_ns_init_one_package, NULL, NULL,
+                                        NULL);
+
         /* Parameter Data (optional) */
 
         if (parameter_node) {
@@ -430,6 +437,13 @@ acpi_ex_load_op(union acpi_operand_object *obj_desc,
                 return_ACPI_STATUS(status);
         }
 
+        /* Complete the initialization/resolution of package objects */
+
+        status = acpi_ns_walk_namespace(ACPI_TYPE_PACKAGE, ACPI_ROOT_OBJECT,
+                                        ACPI_UINT32_MAX, 0,
+                                        acpi_ns_init_one_package, NULL, NULL,
+                                        NULL);
+
         /* Store the ddb_handle into the Target operand */
 
         status = acpi_ex_store(ddb_handle, target, walk_state);
diff --git a/drivers/acpi/acpica/nsinit.c b/drivers/acpi/acpica/nsinit.c
index 77f2b5f4948a..d77257d1c827 100644
--- a/drivers/acpi/acpica/nsinit.c
+++ b/drivers/acpi/acpica/nsinit.c
@@ -242,6 +242,58 @@ error_exit:
 
 /*******************************************************************************
  *
+ * FUNCTION:    acpi_ns_init_one_package
+ *
+ * PARAMETERS:  obj_handle      - Node
+ *              level           - Current nesting level
+ *              context         - Not used
+ *              return_value    - Not used
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Callback from acpi_walk_namespace. Invoked for every package
+ *              within the namespace. Used during dynamic load of an SSDT.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ns_init_one_package(acpi_handle obj_handle,
+                         u32 level, void *context, void **return_value)
+{
+        acpi_status status;
+        union acpi_operand_object *obj_desc;
+        struct acpi_namespace_node *node =
+            (struct acpi_namespace_node *)obj_handle;
+
+        obj_desc = acpi_ns_get_attached_object(node);
+        if (!obj_desc) {
+                return (AE_OK);
+        }
+
+        /* Exit if package is already initialized */
+
+        if (obj_desc->package.flags & AOPOBJ_DATA_VALID) {
+                return (AE_OK);
+        }
+
+        status = acpi_ds_get_package_arguments(obj_desc);
+        if (ACPI_FAILURE(status)) {
+                return (AE_OK);
+        }
+
+        status =
+            acpi_ut_walk_package_tree(obj_desc, NULL,
+                                      acpi_ds_init_package_element, NULL);
+        if (ACPI_FAILURE(status)) {
+                return (AE_OK);
+        }
+
+        obj_desc->package.flags |= AOPOBJ_DATA_VALID;
+        return (AE_OK);
+}
+
+/*******************************************************************************
+ *
  * FUNCTION:    acpi_ns_init_one_object
  *
  * PARAMETERS:  obj_handle      - Node
@@ -360,27 +412,11 @@ acpi_ns_init_one_object(acpi_handle obj_handle,
 
         case ACPI_TYPE_PACKAGE:
 
-                info->package_init++;
-                status = acpi_ds_get_package_arguments(obj_desc);
-                if (ACPI_FAILURE(status)) {
-                        break;
-                }
-
-                ACPI_DEBUG_PRINT_RAW((ACPI_DB_PARSE,
-                                      "%s: Completing resolution of Package elements\n",
-                                      ACPI_GET_FUNCTION_NAME));
+                /* Complete the initialization/resolution of the package object */
 
-                /*
-                 * Resolve all named references in package objects (and all
-                 * sub-packages). This action has been deferred until the entire
-                 * namespace has been loaded, in order to support external and
-                 * forward references from individual package elements (05/2017).
-                 */
-                status = acpi_ut_walk_package_tree(obj_desc, NULL,
-                                                   acpi_ds_init_package_element,
-                                                   NULL);
-
-                obj_desc->package.flags |= AOPOBJ_DATA_VALID;
+                info->package_init++;
+                status =
+                    acpi_ns_init_one_package(obj_handle, level, NULL, NULL);
                 break;
 
         default: