Merge commit 'v2.6.29-rc1' into irq/urgent

1 files changed, 970 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/utcopy.c b/drivers/acpi/acpica/utcopy.c
new file mode 100644
index 000000000000..b0dcfd3c872a
--- /dev/null
+++ b/drivers/acpi/acpica/utcopy.c
@@ -0,0 +1,970 @@
+/******************************************************************************
+ *
+ * Module Name: utcopy - Internal to external object translation utilities
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2008, Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    substantially similar to the "NO WARRANTY" disclaimer below
+ *    ("Disclaimer") and any redistribution must be conditioned upon
+ *    including a substantially similar Disclaimer requirement for further
+ *    binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ *    of any contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ */
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "acnamesp.h"
+
+
+#define _COMPONENT          ACPI_UTILITIES
+ACPI_MODULE_NAME("utcopy")
+
+/* Local prototypes */
+static acpi_status
+acpi_ut_copy_isimple_to_esimple(union acpi_operand_object *internal_object,
+				union acpi_object *external_object,
+				u8 * data_space, acpi_size * buffer_space_used);
+
+static acpi_status
+acpi_ut_copy_ielement_to_ielement(u8 object_type,
+				  union acpi_operand_object *source_object,
+				  union acpi_generic_state *state,
+				  void *context);
+
+static acpi_status
+acpi_ut_copy_ipackage_to_epackage(union acpi_operand_object *internal_object,
+				  u8 * buffer, acpi_size * space_used);
+
+static acpi_status
+acpi_ut_copy_esimple_to_isimple(union acpi_object *user_obj,
+				union acpi_operand_object **return_obj);
+
+static acpi_status
+acpi_ut_copy_epackage_to_ipackage(union acpi_object *external_object,
+				  union acpi_operand_object **internal_object);
+
+static acpi_status
+acpi_ut_copy_simple_object(union acpi_operand_object *source_desc,
+			   union acpi_operand_object *dest_desc);
+
+static acpi_status
+acpi_ut_copy_ielement_to_eelement(u8 object_type,
+				  union acpi_operand_object *source_object,
+				  union acpi_generic_state *state,
+				  void *context);
+
+static acpi_status
+acpi_ut_copy_ipackage_to_ipackage(union acpi_operand_object *source_obj,
+				  union acpi_operand_object *dest_obj,
+				  struct acpi_walk_state *walk_state);
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_copy_isimple_to_esimple
+ *
+ * PARAMETERS:  internal_object     - Source object to be copied
+ *              external_object     - Where to return the copied object
+ *              data_space          - Where object data is returned (such as
+ *                                    buffer and string data)
+ *              buffer_space_used   - Length of data_space that was used
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: This function is called to copy a simple internal object to
+ *              an external object.
+ *
+ *              The data_space buffer is assumed to have sufficient space for
+ *              the object.
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_ut_copy_isimple_to_esimple(union acpi_operand_object *internal_object,
+				union acpi_object *external_object,
+				u8 * data_space, acpi_size * buffer_space_used)
+{
+	acpi_status status = AE_OK;
+
+	ACPI_FUNCTION_TRACE(ut_copy_isimple_to_esimple);
+
+	*buffer_space_used = 0;
+
+	/*
+	 * Check for NULL object case (could be an uninitialized
+	 * package element)
+	 */
+	if (!internal_object) {
+		return_ACPI_STATUS(AE_OK);
+	}
+
+	/* Always clear the external object */
+
+	ACPI_MEMSET(external_object, 0, sizeof(union acpi_object));
+
+	/*
+	 * In general, the external object will be the same type as
+	 * the internal object
+	 */
+	external_object->type = ACPI_GET_OBJECT_TYPE(internal_object);
+
+	/* However, only a limited number of external types are supported */
+
+	switch (ACPI_GET_OBJECT_TYPE(internal_object)) {
+	case ACPI_TYPE_STRING:
+
+		external_object->string.pointer = (char *)data_space;
+		external_object->string.length = internal_object->string.length;
+		*buffer_space_used = ACPI_ROUND_UP_TO_NATIVE_WORD((acpi_size)
+								  internal_object->
+								  string.
+								  length + 1);
+
+		ACPI_MEMCPY((void *)data_space,
+			    (void *)internal_object->string.pointer,
+			    (acpi_size) internal_object->string.length + 1);
+		break;
+
+	case ACPI_TYPE_BUFFER:
+
+		external_object->buffer.pointer = data_space;
+		external_object->buffer.length = internal_object->buffer.length;
+		*buffer_space_used =
+		    ACPI_ROUND_UP_TO_NATIVE_WORD(internal_object->string.
+						 length);
+
+		ACPI_MEMCPY((void *)data_space,
+			    (void *)internal_object->buffer.pointer,
+			    internal_object->buffer.length);
+		break;
+
+	case ACPI_TYPE_INTEGER:
+
+		external_object->integer.value = internal_object->integer.value;
+		break;
+
+	case ACPI_TYPE_LOCAL_REFERENCE:
+
+		/* This is an object reference. */
+
+		switch (internal_object->reference.class) {
+		case ACPI_REFCLASS_NAME:
+
+			/*
+			 * For namepath, return the object handle ("reference")
+			 * We are referring to the namespace node
+			 */
+			external_object->reference.handle =
+			    internal_object->reference.node;
+			external_object->reference.actual_type =
+			    acpi_ns_get_type(internal_object->reference.node);
+			break;
+
+		default:
+
+			/* All other reference types are unsupported */
+
+			return_ACPI_STATUS(AE_TYPE);
+		}
+		break;
+
+	case ACPI_TYPE_PROCESSOR:
+
+		external_object->processor.proc_id =
+		    internal_object->processor.proc_id;
+		external_object->processor.pblk_address =
+		    internal_object->processor.address;
+		external_object->processor.pblk_length =
+		    internal_object->processor.length;
+		break;
+
+	case ACPI_TYPE_POWER:
+
+		external_object->power_resource.system_level =
+		    internal_object->power_resource.system_level;
+
+		external_object->power_resource.resource_order =
+		    internal_object->power_resource.resource_order;
+		break;
+
+	default:
+		/*
+		 * There is no corresponding external object type
+		 */
+		ACPI_ERROR((AE_INFO,
+			    "Unsupported object type, cannot convert to external object: %s",
+			    acpi_ut_get_type_name(ACPI_GET_OBJECT_TYPE
+						  (internal_object))));
+
+		return_ACPI_STATUS(AE_SUPPORT);
+	}
+
+	return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_copy_ielement_to_eelement
+ *
+ * PARAMETERS:  acpi_pkg_callback
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Copy one package element to another package element
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_ut_copy_ielement_to_eelement(u8 object_type,
+				  union acpi_operand_object *source_object,
+				  union acpi_generic_state *state,
+				  void *context)
+{
+	acpi_status status = AE_OK;
+	struct acpi_pkg_info *info = (struct acpi_pkg_info *)context;
+	acpi_size object_space;
+	u32 this_index;
+	union acpi_object *target_object;
+
+	ACPI_FUNCTION_ENTRY();
+
+	this_index = state->pkg.index;
+	target_object = (union acpi_object *)
+	    &((union acpi_object *)(state->pkg.dest_object))->package.
+	    elements[this_index];
+
+	switch (object_type) {
+	case ACPI_COPY_TYPE_SIMPLE:
+
+		/*
+		 * This is a simple or null object
+		 */
+		status = acpi_ut_copy_isimple_to_esimple(source_object,
+							 target_object,
+							 info->free_space,
+							 &object_space);
+		if (ACPI_FAILURE(status)) {
+			return (status);
+		}
+		break;
+
+	case ACPI_COPY_TYPE_PACKAGE:
+
+		/*
+		 * Build the package object
+		 */
+		target_object->type = ACPI_TYPE_PACKAGE;
+		target_object->package.count = source_object->package.count;
+		target_object->package.elements =
+		    ACPI_CAST_PTR(union acpi_object, info->free_space);
+
+		/*
+		 * Pass the new package object back to the package walk routine
+		 */
+		state->pkg.this_target_obj = target_object;
+
+		/*
+		 * Save space for the array of objects (Package elements)
+		 * update the buffer length counter
+		 */
+		object_space = ACPI_ROUND_UP_TO_NATIVE_WORD((acpi_size)
+							    target_object->
+							    package.count *
+							    sizeof(union
+								   acpi_object));
+		break;
+
+	default:
+		return (AE_BAD_PARAMETER);
+	}
+
+	info->free_space += object_space;
+	info->length += object_space;
+	return (status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_copy_ipackage_to_epackage
+ *
+ * PARAMETERS:  internal_object     - Pointer to the object we are returning
+ *              Buffer              - Where the object is returned
+ *              space_used          - Where the object length is returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: This function is called to place a package object in a user
+ *              buffer.  A package object by definition contains other objects.
+ *
+ *              The buffer is assumed to have sufficient space for the object.
+ *              The caller must have verified the buffer length needed using the
+ *              acpi_ut_get_object_size function before calling this function.
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_ut_copy_ipackage_to_epackage(union acpi_operand_object *internal_object,
+				  u8 * buffer, acpi_size * space_used)
+{
+	union acpi_object *external_object;
+	acpi_status status;
+	struct acpi_pkg_info info;
+
+	ACPI_FUNCTION_TRACE(ut_copy_ipackage_to_epackage);
+
+	/*
+	 * First package at head of the buffer
+	 */
+	external_object = ACPI_CAST_PTR(union acpi_object, buffer);
+
+	/*
+	 * Free space begins right after the first package
+	 */
+	info.length = ACPI_ROUND_UP_TO_NATIVE_WORD(sizeof(union acpi_object));
+	info.free_space =
+	    buffer + ACPI_ROUND_UP_TO_NATIVE_WORD(sizeof(union acpi_object));
+	info.object_space = 0;
+	info.num_packages = 1;
+
+	external_object->type = ACPI_GET_OBJECT_TYPE(internal_object);
+	external_object->package.count = internal_object->package.count;
+	external_object->package.elements = ACPI_CAST_PTR(union acpi_object,
+							  info.free_space);
+
+	/*
+	 * Leave room for an array of ACPI_OBJECTS in the buffer
+	 * and move the free space past it
+	 */
+	info.length += (acpi_size) external_object->package.count *
+	    ACPI_ROUND_UP_TO_NATIVE_WORD(sizeof(union acpi_object));
+	info.free_space += external_object->package.count *
+	    ACPI_ROUND_UP_TO_NATIVE_WORD(sizeof(union acpi_object));
+
+	status = acpi_ut_walk_package_tree(internal_object, external_object,
+					   acpi_ut_copy_ielement_to_eelement,
+					   &info);
+
+	*space_used = info.length;
+	return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_copy_iobject_to_eobject
+ *
+ * PARAMETERS:  internal_object     - The internal object to be converted
+ *              buffer_ptr          - Where the object is returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: This function is called to build an API object to be returned to
+ *              the caller.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ut_copy_iobject_to_eobject(union acpi_operand_object *internal_object,
+				struct acpi_buffer *ret_buffer)
+{
+	acpi_status status;
+
+	ACPI_FUNCTION_TRACE(ut_copy_iobject_to_eobject);
+
+	if (ACPI_GET_OBJECT_TYPE(internal_object) == ACPI_TYPE_PACKAGE) {
+		/*
+		 * Package object:  Copy all subobjects (including
+		 * nested packages)
+		 */
+		status = acpi_ut_copy_ipackage_to_epackage(internal_object,
+							   ret_buffer->pointer,
+							   &ret_buffer->length);
+	} else {
+		/*
+		 * Build a simple object (no nested objects)
+		 */
+		status = acpi_ut_copy_isimple_to_esimple(internal_object,
+							 ACPI_CAST_PTR(union
+								       acpi_object,
+								       ret_buffer->
+								       pointer),
+							 ACPI_ADD_PTR(u8,
+								      ret_buffer->
+								      pointer,
+								      ACPI_ROUND_UP_TO_NATIVE_WORD
+								      (sizeof
+								       (union
+									acpi_object))),
+							 &ret_buffer->length);
+		/*
+		 * build simple does not include the object size in the length
+		 * so we add it in here
+		 */
+		ret_buffer->length += sizeof(union acpi_object);
+	}
+
+	return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_copy_esimple_to_isimple
+ *
+ * PARAMETERS:  external_object     - The external object to be converted
+ *              ret_internal_object - Where the internal object is returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: This function copies an external object to an internal one.
+ *              NOTE: Pointers can be copied, we don't need to copy data.
+ *              (The pointers have to be valid in our address space no matter
+ *              what we do with them!)
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_ut_copy_esimple_to_isimple(union acpi_object *external_object,
+				union acpi_operand_object **ret_internal_object)
+{
+	union acpi_operand_object *internal_object;
+
+	ACPI_FUNCTION_TRACE(ut_copy_esimple_to_isimple);
+
+	/*
+	 * Simple types supported are: String, Buffer, Integer
+	 */
+	switch (external_object->type) {
+	case ACPI_TYPE_STRING:
+	case ACPI_TYPE_BUFFER:
+	case ACPI_TYPE_INTEGER:
+	case ACPI_TYPE_LOCAL_REFERENCE:
+
+		internal_object = acpi_ut_create_internal_object((u8)
+								 external_object->
+								 type);
+		if (!internal_object) {
+			return_ACPI_STATUS(AE_NO_MEMORY);
+		}
+		break;
+
+	case ACPI_TYPE_ANY:	/* This is the case for a NULL object */
+
+		*ret_internal_object = NULL;
+		return_ACPI_STATUS(AE_OK);
+
+	default:
+		/* All other types are not supported */
+
+		ACPI_ERROR((AE_INFO,
+			    "Unsupported object type, cannot convert to internal object: %s",
+			    acpi_ut_get_type_name(external_object->type)));
+
+		return_ACPI_STATUS(AE_SUPPORT);
+	}
+
+	/* Must COPY string and buffer contents */
+
+	switch (external_object->type) {
+	case ACPI_TYPE_STRING:
+
+		internal_object->string.pointer =
+		    ACPI_ALLOCATE_ZEROED((acpi_size) external_object->string.
+					 length + 1);
+		if (!internal_object->string.pointer) {
+			goto error_exit;
+		}
+
+		ACPI_MEMCPY(internal_object->string.pointer,
+			    external_object->string.pointer,
+			    external_object->string.length);
+
+		internal_object->string.length = external_object->string.length;
+		break;
+
+	case ACPI_TYPE_BUFFER:
+
+		internal_object->buffer.pointer =
+		    ACPI_ALLOCATE_ZEROED(external_object->buffer.length);
+		if (!internal_object->buffer.pointer) {
+			goto error_exit;
+		}
+
+		ACPI_MEMCPY(internal_object->buffer.pointer,
+			    external_object->buffer.pointer,
+			    external_object->buffer.length);
+
+		internal_object->buffer.length = external_object->buffer.length;
+
+		/* Mark buffer data valid */
+
+		internal_object->buffer.flags |= AOPOBJ_DATA_VALID;
+		break;
+
+	case ACPI_TYPE_INTEGER:
+
+		internal_object->integer.value = external_object->integer.value;
+		break;
+
+	case ACPI_TYPE_LOCAL_REFERENCE:
+
+		/* TBD: should validate incoming handle */
+
+		internal_object->reference.class = ACPI_REFCLASS_NAME;
+		internal_object->reference.node =
+		    external_object->reference.handle;
+		break;
+
+	default:
+		/* Other types can't get here */
+		break;
+	}
+
+	*ret_internal_object = internal_object;
+	return_ACPI_STATUS(AE_OK);
+
+      error_exit:
+	acpi_ut_remove_reference(internal_object);
+	return_ACPI_STATUS(AE_NO_MEMORY);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_copy_epackage_to_ipackage
+ *
+ * PARAMETERS:  external_object     - The external object to be converted
+ *              internal_object     - Where the internal object is returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Copy an external package object to an internal package.
+ *              Handles nested packages.
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_ut_copy_epackage_to_ipackage(union acpi_object *external_object,
+				  union acpi_operand_object **internal_object)
+{
+	acpi_status status = AE_OK;
+	union acpi_operand_object *package_object;
+	union acpi_operand_object **package_elements;
+	u32 i;
+
+	ACPI_FUNCTION_TRACE(ut_copy_epackage_to_ipackage);
+
+	/* Create the package object */
+
+	package_object =
+	    acpi_ut_create_package_object(external_object->package.count);
+	if (!package_object) {
+		return_ACPI_STATUS(AE_NO_MEMORY);
+	}
+
+	package_elements = package_object->package.elements;
+
+	/*
+	 * Recursive implementation. Probably ok, since nested external packages
+	 * as parameters should be very rare.
+	 */
+	for (i = 0; i < external_object->package.count; i++) {
+		status =
+		    acpi_ut_copy_eobject_to_iobject(&external_object->package.
+						    elements[i],
+						    &package_elements[i]);
+		if (ACPI_FAILURE(status)) {
+
+			/* Truncate package and delete it */
+
+			package_object->package.count = i;
+			package_elements[i] = NULL;
+			acpi_ut_remove_reference(package_object);
+			return_ACPI_STATUS(status);
+		}
+	}
+
+	/* Mark package data valid */
+
+	package_object->package.flags |= AOPOBJ_DATA_VALID;
+
+	*internal_object = package_object;
+	return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_copy_eobject_to_iobject
+ *
+ * PARAMETERS:  external_object     - The external object to be converted
+ *              internal_object     - Where the internal object is returned
+ *
+ * RETURN:      Status              - the status of the call
+ *
+ * DESCRIPTION: Converts an external object to an internal object.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ut_copy_eobject_to_iobject(union acpi_object *external_object,
+				union acpi_operand_object **internal_object)
+{
+	acpi_status status;
+
+	ACPI_FUNCTION_TRACE(ut_copy_eobject_to_iobject);
+
+	if (external_object->type == ACPI_TYPE_PACKAGE) {
+		status =
+		    acpi_ut_copy_epackage_to_ipackage(external_object,
+						      internal_object);
+	} else {
+		/*
+		 * Build a simple object (no nested objects)
+		 */
+		status =
+		    acpi_ut_copy_esimple_to_isimple(external_object,
+						    internal_object);
+	}
+
+	return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_copy_simple_object
+ *
+ * PARAMETERS:  source_desc         - The internal object to be copied
+ *              dest_desc           - New target object
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Simple copy of one internal object to another.  Reference count
+ *              of the destination object is preserved.
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_ut_copy_simple_object(union acpi_operand_object *source_desc,
+			   union acpi_operand_object *dest_desc)
+{
+	u16 reference_count;
+	union acpi_operand_object *next_object;
+
+	/* Save fields from destination that we don't want to overwrite */
+
+	reference_count = dest_desc->common.reference_count;
+	next_object = dest_desc->common.next_object;
+
+	/* Copy the entire source object over the destination object */
+
+	ACPI_MEMCPY((char *)dest_desc, (char *)source_desc,
+		    sizeof(union acpi_operand_object));
+
+	/* Restore the saved fields */
+
+	dest_desc->common.reference_count = reference_count;
+	dest_desc->common.next_object = next_object;
+
+	/* New object is not static, regardless of source */
+
+	dest_desc->common.flags &= ~AOPOBJ_STATIC_POINTER;
+
+	/* Handle the objects with extra data */
+
+	switch (ACPI_GET_OBJECT_TYPE(dest_desc)) {
+	case ACPI_TYPE_BUFFER:
+		/*
+		 * Allocate and copy the actual buffer if and only if:
+		 * 1) There is a valid buffer pointer
+		 * 2) The buffer has a length > 0
+		 */
+		if ((source_desc->buffer.pointer) &&
+		    (source_desc->buffer.length)) {
+			dest_desc->buffer.pointer =
+			    ACPI_ALLOCATE(source_desc->buffer.length);
+			if (!dest_desc->buffer.pointer) {
+				return (AE_NO_MEMORY);
+			}
+
+			/* Copy the actual buffer data */
+
+			ACPI_MEMCPY(dest_desc->buffer.pointer,
+				    source_desc->buffer.pointer,
+				    source_desc->buffer.length);
+		}
+		break;
+
+	case ACPI_TYPE_STRING:
+		/*
+		 * Allocate and copy the actual string if and only if:
+		 * 1) There is a valid string pointer
+		 * (Pointer to a NULL string is allowed)
+		 */
+		if (source_desc->string.pointer) {
+			dest_desc->string.pointer =
+			    ACPI_ALLOCATE((acpi_size) source_desc->string.
+					  length + 1);
+			if (!dest_desc->string.pointer) {
+				return (AE_NO_MEMORY);
+			}
+
+			/* Copy the actual string data */
+
+			ACPI_MEMCPY(dest_desc->string.pointer,
+				    source_desc->string.pointer,
+				    (acpi_size) source_desc->string.length + 1);
+		}
+		break;
+
+	case ACPI_TYPE_LOCAL_REFERENCE:
+		/*
+		 * We copied the reference object, so we now must add a reference
+		 * to the object pointed to by the reference
+		 *
+		 * DDBHandle reference (from Load/load_table) is a special reference,
+		 * it does not have a Reference.Object, so does not need to
+		 * increase the reference count
+		 */
+		if (source_desc->reference.class == ACPI_REFCLASS_TABLE) {
+			break;
+		}
+
+		acpi_ut_add_reference(source_desc->reference.object);
+		break;
+
+	case ACPI_TYPE_REGION:
+		/*
+		 * We copied the Region Handler, so we now must add a reference
+		 */
+		if (dest_desc->region.handler) {
+			acpi_ut_add_reference(dest_desc->region.handler);
+		}
+		break;
+
+	default:
+		/* Nothing to do for other simple objects */
+		break;
+	}
+
+	return (AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_copy_ielement_to_ielement
+ *
+ * PARAMETERS:  acpi_pkg_callback
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Copy one package element to another package element
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_ut_copy_ielement_to_ielement(u8 object_type,
+				  union acpi_operand_object *source_object,
+				  union acpi_generic_state *state,
+				  void *context)
+{
+	acpi_status status = AE_OK;
+	u32 this_index;
+	union acpi_operand_object **this_target_ptr;
+	union acpi_operand_object *target_object;
+
+	ACPI_FUNCTION_ENTRY();
+
+	this_index = state->pkg.index;
+	this_target_ptr = (union acpi_operand_object **)
+	    &state->pkg.dest_object->package.elements[this_index];
+
+	switch (object_type) {
+	case ACPI_COPY_TYPE_SIMPLE:
+
+		/* A null source object indicates a (legal) null package element */
+
+		if (source_object) {
+			/*
+			 * This is a simple object, just copy it
+			 */
+			target_object =
+			    acpi_ut_create_internal_object(ACPI_GET_OBJECT_TYPE
+							   (source_object));
+			if (!target_object) {
+				return (AE_NO_MEMORY);
+			}
+
+			status =
+			    acpi_ut_copy_simple_object(source_object,
+						       target_object);
+			if (ACPI_FAILURE(status)) {
+				goto error_exit;
+			}
+
+			*this_target_ptr = target_object;
+		} else {
+			/* Pass through a null element */
+
+			*this_target_ptr = NULL;
+		}
+		break;
+
+	case ACPI_COPY_TYPE_PACKAGE:
+
+		/*
+		 * This object is a package - go down another nesting level
+		 * Create and build the package object
+		 */
+		target_object =
+		    acpi_ut_create_package_object(source_object->package.count);
+		if (!target_object) {
+			return (AE_NO_MEMORY);
+		}
+
+		target_object->common.flags = source_object->common.flags;
+
+		/* Pass the new package object back to the package walk routine */
+
+		state->pkg.this_target_obj = target_object;
+
+		/* Store the object pointer in the parent package object */
+
+		*this_target_ptr = target_object;
+		break;
+
+	default:
+		return (AE_BAD_PARAMETER);
+	}
+
+	return (status);
+
+      error_exit:
+	acpi_ut_remove_reference(target_object);
+	return (status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_copy_ipackage_to_ipackage
+ *
+ * PARAMETERS:  *source_obj     - Pointer to the source package object
+ *              *dest_obj       - Where the internal object is returned
+ *
+ * RETURN:      Status          - the status of the call
+ *
+ * DESCRIPTION: This function is called to copy an internal package object
+ *              into another internal package object.
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_ut_copy_ipackage_to_ipackage(union acpi_operand_object *source_obj,
+				  union acpi_operand_object *dest_obj,
+				  struct acpi_walk_state *walk_state)
+{
+	acpi_status status = AE_OK;
+
+	ACPI_FUNCTION_TRACE(ut_copy_ipackage_to_ipackage);
+
+	dest_obj->common.type = ACPI_GET_OBJECT_TYPE(source_obj);
+	dest_obj->common.flags = source_obj->common.flags;
+	dest_obj->package.count = source_obj->package.count;
+
+	/*
+	 * Create the object array and walk the source package tree
+	 */
+	dest_obj->package.elements = ACPI_ALLOCATE_ZEROED(((acpi_size)
+							   source_obj->package.
+							   count +
+							   1) * sizeof(void *));
+	if (!dest_obj->package.elements) {
+		ACPI_ERROR((AE_INFO, "Package allocation failure"));
+		return_ACPI_STATUS(AE_NO_MEMORY);
+	}
+
+	/*
+	 * Copy the package element-by-element by walking the package "tree".
+	 * This handles nested packages of arbitrary depth.
+	 */
+	status = acpi_ut_walk_package_tree(source_obj, dest_obj,
+					   acpi_ut_copy_ielement_to_ielement,
+					   walk_state);
+	if (ACPI_FAILURE(status)) {
+
+		/* On failure, delete the destination package object */
+
+		acpi_ut_remove_reference(dest_obj);
+	}
+
+	return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_copy_iobject_to_iobject
+ *
+ * PARAMETERS:  walk_state          - Current walk state
+ *              source_desc         - The internal object to be copied
+ *              dest_desc           - Where the copied object is returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Copy an internal object to a new internal object
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ut_copy_iobject_to_iobject(union acpi_operand_object *source_desc,
+				union acpi_operand_object **dest_desc,
+				struct acpi_walk_state *walk_state)
+{
+	acpi_status status = AE_OK;
+
+	ACPI_FUNCTION_TRACE(ut_copy_iobject_to_iobject);
+
+	/* Create the top level object */
+
+	*dest_desc =
+	    acpi_ut_create_internal_object(ACPI_GET_OBJECT_TYPE(source_desc));
+	if (!*dest_desc) {
+		return_ACPI_STATUS(AE_NO_MEMORY);
+	}
+
+	/* Copy the object and possible subobjects */
+
+	if (ACPI_GET_OBJECT_TYPE(source_desc) == ACPI_TYPE_PACKAGE) {
+		status =
+		    acpi_ut_copy_ipackage_to_ipackage(source_desc, *dest_desc,
+						      walk_state);
+	} else {
+		status = acpi_ut_copy_simple_object(source_desc, *dest_desc);
+	}
+
+	return_ACPI_STATUS(status);
+}