patch-2.4.6 linux/drivers/acpi/common/cmdelete.c

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diff -u --recursive --new-file v2.4.5/linux/drivers/acpi/common/cmdelete.c linux/drivers/acpi/common/cmdelete.c
@@ -1,591 +0,0 @@
-/*******************************************************************************
- *
- * Module Name: cmdelete - object deletion and reference count utilities
- *              $Revision: 62 $
- *
- ******************************************************************************/
-
-/*
- *  Copyright (C) 2000, 2001 R. Byron Moore
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- */
-
-
-#include "acpi.h"
-#include "acinterp.h"
-#include "acnamesp.h"
-#include "actables.h"
-#include "acparser.h"
-
-#define _COMPONENT          MISCELLANEOUS
-	 MODULE_NAME         ("cmdelete")
-
-
-/*******************************************************************************
- *
- * FUNCTION:    Acpi_cm_delete_internal_obj
- *
- * PARAMETERS:  *Object        - Pointer to the list to be deleted
- *
- * RETURN:      None
- *
- * DESCRIPTION: Low level object deletion, after reference counts have been
- *              updated (All reference counts, including sub-objects!)
- *
- ******************************************************************************/
-
-void
-acpi_cm_delete_internal_obj (
-	ACPI_OPERAND_OBJECT     *object)
-{
-	void                    *obj_pointer = NULL;
-	ACPI_OPERAND_OBJECT     *handler_desc;
-
-
-	if (!object) {
-		return;
-	}
-
-	/*
-	 * Must delete or free any pointers within the object that are not
-	 * actual ACPI objects (for example, a raw buffer pointer).
-	 */
-
-	switch (object->common.type)
-	{
-
-	case ACPI_TYPE_STRING:
-
-		/* Free the actual string buffer */
-
-		obj_pointer = object->string.pointer;
-		break;
-
-
-	case ACPI_TYPE_BUFFER:
-
-		/* Free the actual buffer */
-
-		obj_pointer = object->buffer.pointer;
-		break;
-
-
-	case ACPI_TYPE_PACKAGE:
-
-		/*
-		 * Elements of the package are not handled here, they are deleted
-		 * separately
-		 */
-
-		/* Free the (variable length) element pointer array */
-
-		obj_pointer = object->package.elements;
-		break;
-
-
-	case ACPI_TYPE_MUTEX:
-
-		acpi_os_delete_semaphore (object->mutex.semaphore);
-		break;
-
-
-	case ACPI_TYPE_EVENT:
-
-		acpi_os_delete_semaphore (object->event.semaphore);
-		object->event.semaphore = NULL;
-		break;
-
-
-	case ACPI_TYPE_METHOD:
-
-		/* Delete the method semaphore if it exists */
-
-		if (object->method.semaphore) {
-			acpi_os_delete_semaphore (object->method.semaphore);
-			object->method.semaphore = NULL;
-		}
-
-		break;
-
-
-	case ACPI_TYPE_REGION:
-
-
-		if (object->region.extra) {
-			/*
-			 * Free the Region_context if and only if the handler is one of the
-			 * default handlers -- and therefore, we created the context object
-			 * locally, it was not created by an external caller.
-			 */
-			handler_desc = object->region.addr_handler;
-			if ((handler_desc) &&
-				(handler_desc->addr_handler.hflags == ADDR_HANDLER_DEFAULT_INSTALLED))
-			{
-				obj_pointer = object->region.extra->extra.region_context;
-			}
-
-			/* Now we can free the Extra object */
-
-			acpi_cm_delete_object_desc (object->region.extra);
-		}
-		break;
-
-
-	case ACPI_TYPE_FIELD_UNIT:
-
-		if (object->field_unit.extra) {
-			acpi_cm_delete_object_desc (object->field_unit.extra);
-		}
-		break;
-
-	default:
-		break;
-	}
-
-
-	/*
-	 * Delete any allocated memory found above
-	 */
-
-	if (obj_pointer) {
-		if (!acpi_tb_system_table_pointer (obj_pointer)) {
-			acpi_cm_free (obj_pointer);
-		}
-	}
-
-
-	/* Only delete the object if it was dynamically allocated */
-
-
-	if (!(object->common.flags & AOPOBJ_STATIC_ALLOCATION)) {
-		acpi_cm_delete_object_desc (object);
-
-	}
-
-	return;
-}
-
-
-/*******************************************************************************
- *
- * FUNCTION:    Acpi_cm_delete_internal_object_list
- *
- * PARAMETERS:  *Obj_list       - Pointer to the list to be deleted
- *
- * RETURN:      Status          - the status of the call
- *
- * DESCRIPTION: This function deletes an internal object list, including both
- *              simple objects and package objects
- *
- ******************************************************************************/
-
-ACPI_STATUS
-acpi_cm_delete_internal_object_list (
-	ACPI_OPERAND_OBJECT     **obj_list)
-{
-	ACPI_OPERAND_OBJECT     **internal_obj;
-
-
-	/* Walk the null-terminated internal list */
-
-	for (internal_obj = obj_list; *internal_obj; internal_obj++) {
-		/*
-		 * Check for a package
-		 * Simple objects are simply stored in the array and do not
-		 * need to be deleted separately.
-		 */
-
-		if (IS_THIS_OBJECT_TYPE ((*internal_obj), ACPI_TYPE_PACKAGE)) {
-			/* Delete the package */
-
-			/*
-			 * TBD: [Investigate] This might not be the right thing to do,
-			 * depending on how the internal package object was allocated!!!
-			 */
-			acpi_cm_delete_internal_obj (*internal_obj);
-		}
-
-	}
-
-	/* Free the combined parameter pointer list and object array */
-
-	acpi_cm_free (obj_list);
-
-	return (AE_OK);
-}
-
-
-/*******************************************************************************
- *
- * FUNCTION:    Acpi_cm_update_ref_count
- *
- * PARAMETERS:  *Object         - Object whose ref count is to be updated
- *              Action          - What to do
- *
- * RETURN:      New ref count
- *
- * DESCRIPTION: Modify the ref count and return it.
- *
- ******************************************************************************/
-
-static void
-acpi_cm_update_ref_count (
-	ACPI_OPERAND_OBJECT     *object,
-	u32                     action)
-{
-	u16                     count;
-	u16                     new_count;
-
-
-	if (!object) {
-		return;
-	}
-
-
-	count = object->common.reference_count;
-	new_count = count;
-
-	/*
-	 * Reference count action (increment, decrement, or force delete)
-	 */
-
-	switch (action)
-	{
-
-	case REF_INCREMENT:
-
-		new_count++;
-		object->common.reference_count = new_count;
-
-		break;
-
-
-	case REF_DECREMENT:
-
-		if (count < 1) {
-			new_count = 0;
-		}
-
-		else {
-			new_count--;
-
-		}
-
-
-		object->common.reference_count = new_count;
-		if (new_count == 0) {
-			acpi_cm_delete_internal_obj (object);
-		}
-
-		break;
-
-
-	case REF_FORCE_DELETE:
-
-		new_count = 0;
-		object->common.reference_count = new_count;
-		acpi_cm_delete_internal_obj (object);
-		break;
-
-
-	default:
-
-		break;
-	}
-
-
-	/*
-	 * Sanity check the reference count, for debug purposes only.
-	 * (A deleted object will have a huge reference count)
-	 */
-
-
-	return;
-}
-
-
-/*******************************************************************************
- *
- * FUNCTION:    Acpi_cm_update_object_reference
- *
- * PARAMETERS:  *Object             - Increment ref count for this object
- *                                    and all sub-objects
- *              Action              - Either REF_INCREMENT or REF_DECREMENT or
- *                                    REF_FORCE_DELETE
- *
- * RETURN:      Status
- *
- * DESCRIPTION: Increment the object reference count
- *
- * Object references are incremented when:
- * 1) An object is attached to a Node (namespace object)
- * 2) An object is copied (all subobjects must be incremented)
- *
- * Object references are decremented when:
- * 1) An object is detached from an Node
- *
- ******************************************************************************/
-
-ACPI_STATUS
-acpi_cm_update_object_reference (
-	ACPI_OPERAND_OBJECT     *object,
-	u16                     action)
-{
-	ACPI_STATUS             status;
-	u32                     i;
-	ACPI_OPERAND_OBJECT     *next;
-	ACPI_OPERAND_OBJECT     *new;
-	ACPI_GENERIC_STATE       *state_list = NULL;
-	ACPI_GENERIC_STATE       *state;
-
-
-	/* Ignore a null object ptr */
-
-	if (!object) {
-		return (AE_OK);
-	}
-
-
-	/*
-	 * Make sure that this isn't a namespace handle or an AML pointer
-	 */
-
-	if (VALID_DESCRIPTOR_TYPE (object, ACPI_DESC_TYPE_NAMED)) {
-		return (AE_OK);
-	}
-
-	if (acpi_tb_system_table_pointer (object)) {
-		return (AE_OK);
-	}
-
-
-	state = acpi_cm_create_update_state (object, action);
-
-	while (state) {
-
-		object = state->update.object;
-		action = state->update.value;
-		acpi_cm_delete_generic_state (state);
-
-		/*
-		 * All sub-objects must have their reference count incremented also.
-		 * Different object types have different subobjects.
-		 */
-		switch (object->common.type)
-		{
-
-		case ACPI_TYPE_DEVICE:
-
-			status = acpi_cm_create_update_state_and_push (object->device.addr_handler,
-					   action, &state_list);
-			if (ACPI_FAILURE (status)) {
-				return (status);
-			}
-
-			acpi_cm_update_ref_count (object->device.sys_handler, action);
-			acpi_cm_update_ref_count (object->device.drv_handler, action);
-			break;
-
-
-		case INTERNAL_TYPE_ADDRESS_HANDLER:
-
-			/* Must walk list of address handlers */
-
-			next = object->addr_handler.next;
-			while (next) {
-				new = next->addr_handler.next;
-				acpi_cm_update_ref_count (next, action);
-
-				next = new;
-			}
-			break;
-
-
-		case ACPI_TYPE_PACKAGE:
-
-			/*
-			 * We must update all the sub-objects of the package
-			 * (Each of whom may have their own sub-objects, etc.
-			 */
-			for (i = 0; i < object->package.count; i++) {
-				/*
-				 * Push each element onto the stack for later processing.
-				 * Note: There can be null elements within the package,
-				 * these are simply ignored
-				 */
-
-				status = acpi_cm_create_update_state_and_push (
-						 object->package.elements[i], action, &state_list);
-				if (ACPI_FAILURE (status)) {
-					return (status);
-				}
-			}
-			break;
-
-
-		case ACPI_TYPE_FIELD_UNIT:
-
-			status = acpi_cm_create_update_state_and_push (
-					 object->field_unit.container, action, &state_list);
-
-			if (ACPI_FAILURE (status)) {
-				return (status);
-			}
-			break;
-
-
-		case INTERNAL_TYPE_DEF_FIELD:
-
-			status = acpi_cm_create_update_state_and_push (
-					 object->field.container, action, &state_list);
-			if (ACPI_FAILURE (status)) {
-				return (status);
-			}
-		   break;
-
-
-		case INTERNAL_TYPE_BANK_FIELD:
-
-			status = acpi_cm_create_update_state_and_push (
-					 object->bank_field.bank_select, action, &state_list);
-			if (ACPI_FAILURE (status)) {
-				return (status);
-			}
-
-			status = acpi_cm_create_update_state_and_push (
-					 object->bank_field.container, action, &state_list);
-			if (ACPI_FAILURE (status)) {
-				return (status);
-			}
-			break;
-
-
-		case ACPI_TYPE_REGION:
-
-	/* TBD: [Investigate]
-			Acpi_cm_update_ref_count (Object->Region.Addr_handler, Action);
-	*/
-/*
-			Status =
-				Acpi_cm_create_update_state_and_push (Object->Region.Addr_handler,
-						   Action, &State_list);
-			if (ACPI_FAILURE (Status)) {
-				return (Status);
-			}
-*/
-			break;
-
-
-		case INTERNAL_TYPE_REFERENCE:
-
-			break;
-		}
-
-
-		/*
-		 * Now we can update the count in the main object.  This can only
-		 * happen after we update the sub-objects in case this causes the
-		 * main object to be deleted.
-		 */
-
-		acpi_cm_update_ref_count (object, action);
-
-
-		/* Move on to the next object to be updated */
-
-		state = acpi_cm_pop_generic_state (&state_list);
-	}
-
-
-	return (AE_OK);
-}
-
-
-/*******************************************************************************
- *
- * FUNCTION:    Acpi_cm_add_reference
- *
- * PARAMETERS:  *Object        - Object whose reference count is to be
- *                                  incremented
- *
- * RETURN:      None
- *
- * DESCRIPTION: Add one reference to an ACPI object
- *
- ******************************************************************************/
-
-void
-acpi_cm_add_reference (
-	ACPI_OPERAND_OBJECT     *object)
-{
-
-
-	/*
-	 * Ensure that we have a valid object
-	 */
-
-	if (!acpi_cm_valid_internal_object (object)) {
-		return;
-	}
-
-	/*
-	 * We have a valid ACPI internal object, now increment the reference count
-	 */
-
-	acpi_cm_update_object_reference (object, REF_INCREMENT);
-
-	return;
-}
-
-
-/*******************************************************************************
- *
- * FUNCTION:    Acpi_cm_remove_reference
- *
- * PARAMETERS:  *Object        - Object whose ref count will be decremented
- *
- * RETURN:      None
- *
- * DESCRIPTION: Decrement the reference count of an ACPI internal object
- *
- ******************************************************************************/
-
-void
-acpi_cm_remove_reference (
-	ACPI_OPERAND_OBJECT     *object)
-{
-
-
-	/*
-	 * Ensure that we have a valid object
-	 */
-
-	if (!acpi_cm_valid_internal_object (object)) {
-		return;
-	}
-
-	/*
-	 * Decrement the reference count, and only actually delete the object
-	 * if the reference count becomes 0.  (Must also decrement the ref count
-	 * of all subobjects!)
-	 */
-
-	acpi_cm_update_object_reference (object, REF_DECREMENT);
-
-	return;
-}
-
-

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