--- zzzz-none-000/linux-3.10.107/drivers/acpi/acpica/exresolv.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/acpi/acpica/exresolv.c	2021-02-04 17:41:59.000000000 +0000
@@ -5,7 +5,7 @@
  *****************************************************************************/
 
 /*
- * Copyright (C) 2000 - 2013, Intel Corp.
+ * Copyright (C) 2000 - 2015, Intel Corp.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -156,7 +156,6 @@
 		switch (ref_type) {
 		case ACPI_REFCLASS_LOCAL:
 		case ACPI_REFCLASS_ARG:
-
 			/*
 			 * Get the local from the method's state info
 			 * Note: this increments the local's object reference count
@@ -210,7 +209,6 @@
 					 * (i.e., dereference the package index)
 					 * Delete the ref object, increment the returned object
 					 */
-					acpi_ut_remove_reference(stack_desc);
 					acpi_ut_add_reference(obj_desc);
 					*stack_ptr = obj_desc;
 				} else {
@@ -309,6 +307,7 @@
 		break;
 
 	default:
+
 		break;
 	}
 
@@ -337,8 +336,9 @@
 			 acpi_object_type * return_type,
 			 union acpi_operand_object **return_desc)
 {
-	union acpi_operand_object *obj_desc = (void *)operand;
-	struct acpi_namespace_node *node;
+	union acpi_operand_object *obj_desc = ACPI_CAST_PTR(void, operand);
+	struct acpi_namespace_node *node =
+	    ACPI_CAST_PTR(struct acpi_namespace_node, operand);
 	acpi_object_type type;
 	acpi_status status;
 
@@ -348,14 +348,14 @@
 
 	switch (ACPI_GET_DESCRIPTOR_TYPE(obj_desc)) {
 	case ACPI_DESC_TYPE_OPERAND:
+
 		type = obj_desc->common.type;
 		break;
 
 	case ACPI_DESC_TYPE_NAMED:
+
 		type = ((struct acpi_namespace_node *)obj_desc)->type;
-		obj_desc =
-		    acpi_ns_get_attached_object((struct acpi_namespace_node *)
-						obj_desc);
+		obj_desc = acpi_ns_get_attached_object(node);
 
 		/* If we had an Alias node, use the attached object for type info */
 
@@ -366,6 +366,13 @@
 							 acpi_namespace_node *)
 							obj_desc);
 		}
+
+		if (!obj_desc) {
+			ACPI_ERROR((AE_INFO,
+				    "[%4.4s] Node is unresolved or uninitialized",
+				    acpi_ut_get_node_name(node)));
+			return_ACPI_STATUS(AE_AML_UNINITIALIZED_NODE);
+		}
 		break;
 
 	default:
@@ -519,7 +526,7 @@
 	 */
 	type = obj_desc->common.type;
 
-      exit:
+exit:
 	/* Convert internal types to external types */
 
 	switch (type) {
@@ -538,7 +545,9 @@
 		break;
 
 	default:
+
 		/* No change to Type required */
+
 		break;
 	}