FreeBSD/Linux Kernel Cross Reference
sys/contrib/dev/acpica/components/utilities/utdelete.c

     /*******************************************************************************
      *
      * Module Name: utdelete - object deletion and reference count utilities
      *
      ******************************************************************************/
     
     /******************************************************************************
      *
      * 1. Copyright Notice
     *
     * Some or all of this work - Copyright (c) 1999 - 2022, Intel Corp.
     * All rights reserved.
     *
     * 2. License
     *
     * 2.1. This is your license from Intel Corp. under its intellectual property
     * rights. You may have additional license terms from the party that provided
     * you this software, covering your right to use that party's intellectual
     * property rights.
     *
     * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
     * copy of the source code appearing in this file ("Covered Code") an
     * irrevocable, perpetual, worldwide license under Intel's copyrights in the
     * base code distributed originally by Intel ("Original Intel Code") to copy,
     * make derivatives, distribute, use and display any portion of the Covered
     * Code in any form, with the right to sublicense such rights; and
     *
     * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
     * license (with the right to sublicense), under only those claims of Intel
     * patents that are infringed by the Original Intel Code, to make, use, sell,
     * offer to sell, and import the Covered Code and derivative works thereof
     * solely to the minimum extent necessary to exercise the above copyright
     * license, and in no event shall the patent license extend to any additions
     * to or modifications of the Original Intel Code. No other license or right
     * is granted directly or by implication, estoppel or otherwise;
     *
     * The above copyright and patent license is granted only if the following
     * conditions are met:
     *
     * 3. Conditions
     *
     * 3.1. Redistribution of Source with Rights to Further Distribute Source.
     * Redistribution of source code of any substantial portion of the Covered
     * Code or modification with rights to further distribute source must include
     * the above Copyright Notice, the above License, this list of Conditions,
     * and the following Disclaimer and Export Compliance provision. In addition,
     * Licensee must cause all Covered Code to which Licensee contributes to
     * contain a file documenting the changes Licensee made to create that Covered
     * Code and the date of any change. Licensee must include in that file the
     * documentation of any changes made by any predecessor Licensee. Licensee
     * must include a prominent statement that the modification is derived,
     * directly or indirectly, from Original Intel Code.
     *
     * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
     * Redistribution of source code of any substantial portion of the Covered
     * Code or modification without rights to further distribute source must
     * include the following Disclaimer and Export Compliance provision in the
     * documentation and/or other materials provided with distribution. In
     * addition, Licensee may not authorize further sublicense of source of any
     * portion of the Covered Code, and must include terms to the effect that the
     * license from Licensee to its licensee is limited to the intellectual
     * property embodied in the software Licensee provides to its licensee, and
     * not to intellectual property embodied in modifications its licensee may
     * make.
     *
     * 3.3. Redistribution of Executable. Redistribution in executable form of any
     * substantial portion of the Covered Code or modification must reproduce the
     * above Copyright Notice, and the following Disclaimer and Export Compliance
     * provision in the documentation and/or other materials provided with the
     * distribution.
     *
     * 3.4. Intel retains all right, title, and interest in and to the Original
     * Intel Code.
     *
     * 3.5. Neither the name Intel nor any other trademark owned or controlled by
     * Intel shall be used in advertising or otherwise to promote the sale, use or
     * other dealings in products derived from or relating to the Covered Code
     * without prior written authorization from Intel.
     *
     * 4. Disclaimer and Export Compliance
     *
     * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
     * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
     * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
     * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
     * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
     * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
     * PARTICULAR PURPOSE.
     *
     * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
     * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
     * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
     * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
     * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
     * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
     * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
     * LIMITED REMEDY.
     *
     * 4.3. Licensee shall not export, either directly or indirectly, any of this
    * software or system incorporating such software without first obtaining any
    * required license or other approval from the U. S. Department of Commerce or
    * any other agency or department of the United States Government. In the
    * event Licensee exports any such software from the United States or
    * re-exports any such software from a foreign destination, Licensee shall
    * ensure that the distribution and export/re-export of the software is in
    * compliance with all laws, regulations, orders, or other restrictions of the
    * U.S. Export Administration Regulations. Licensee agrees that neither it nor
    * any of its subsidiaries will export/re-export any technical data, process,
    * software, or service, directly or indirectly, to any country for which the
    * United States government or any agency thereof requires an export license,
    * other governmental approval, or letter of assurance, without first obtaining
    * such license, approval or letter.
    *
    *****************************************************************************
    *
    * Alternatively, you may choose to be licensed under the terms of the
    * following license:
    *
    * 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.
    *
    * 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 MERCHANTABILITY AND FITNESS FOR
    * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
    * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
    * 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 DAMAGE.
    *
    * Alternatively, you may choose to be licensed under the terms of the
    * GNU General Public License ("GPL") version 2 as published by the Free
    * Software Foundation.
    *
    *****************************************************************************/
   
   #include <contrib/dev/acpica/include/acpi.h>
   #include <contrib/dev/acpica/include/accommon.h>
   #include <contrib/dev/acpica/include/acinterp.h>
   #include <contrib/dev/acpica/include/acnamesp.h>
   #include <contrib/dev/acpica/include/acevents.h>
   
   
   #define _COMPONENT          ACPI_UTILITIES
           ACPI_MODULE_NAME    ("utdelete")
   
   /* Local prototypes */
   
   static void
   AcpiUtDeleteInternalObj (
       ACPI_OPERAND_OBJECT     *Object);
   
   static void
   AcpiUtUpdateRefCount (
       ACPI_OPERAND_OBJECT     *Object,
       UINT32                  Action);
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiUtDeleteInternalObj
    *
    * PARAMETERS:  Object         - Object to be deleted
    *
    * RETURN:      None
    *
    * DESCRIPTION: Low level object deletion, after reference counts have been
    *              updated (All reference counts, including sub-objects!)
    *
    ******************************************************************************/
   
   static void
   AcpiUtDeleteInternalObj (
       ACPI_OPERAND_OBJECT     *Object)
   {
       void                    *ObjPointer = NULL;
       ACPI_OPERAND_OBJECT     *HandlerDesc;
       ACPI_OPERAND_OBJECT     *SecondDesc;
       ACPI_OPERAND_OBJECT     *NextDesc;
       ACPI_OPERAND_OBJECT     *StartDesc;
       ACPI_OPERAND_OBJECT     **LastObjPtr;
   
   
       ACPI_FUNCTION_TRACE_PTR (UtDeleteInternalObj, Object);
   
   
       if (!Object)
       {
           return_VOID;
       }
   
       /*
        * 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:
   
           ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "**** String %p, ptr %p\n",
               Object, Object->String.Pointer));
   
           /* Free the actual string buffer */
   
           if (!(Object->Common.Flags & AOPOBJ_STATIC_POINTER))
           {
               /* But only if it is NOT a pointer into an ACPI table */
   
               ObjPointer = Object->String.Pointer;
           }
           break;
   
       case ACPI_TYPE_BUFFER:
   
           ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "**** Buffer %p, ptr %p\n",
               Object, Object->Buffer.Pointer));
   
           /* Free the actual buffer */
   
           if (!(Object->Common.Flags & AOPOBJ_STATIC_POINTER))
           {
               /* But only if it is NOT a pointer into an ACPI table */
   
               ObjPointer = Object->Buffer.Pointer;
           }
           break;
   
       case ACPI_TYPE_PACKAGE:
   
           ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, " **** Package of count %X\n",
               Object->Package.Count));
   
           /*
            * Elements of the package are not handled here, they are deleted
            * separately
            */
   
           /* Free the (variable length) element pointer array */
   
           ObjPointer = Object->Package.Elements;
           break;
   
       /*
        * These objects have a possible list of notify handlers.
        * Device object also may have a GPE block.
        */
       case ACPI_TYPE_DEVICE:
   
           if (Object->Device.GpeBlock)
           {
               (void) AcpiEvDeleteGpeBlock (Object->Device.GpeBlock);
           }
   
           ACPI_FALLTHROUGH;
   
       case ACPI_TYPE_PROCESSOR:
       case ACPI_TYPE_THERMAL:
   
           /* Walk the address handler list for this object */
   
           HandlerDesc = Object->CommonNotify.Handler;
           while (HandlerDesc)
           {
               NextDesc = HandlerDesc->AddressSpace.Next;
               AcpiUtRemoveReference (HandlerDesc);
               HandlerDesc = NextDesc;
           }
           break;
   
       case ACPI_TYPE_MUTEX:
   
           ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
               "***** Mutex %p, OS Mutex %p\n",
               Object, Object->Mutex.OsMutex));
   
           if (Object == AcpiGbl_GlobalLockMutex)
           {
               /* Global Lock has extra semaphore */
   
               (void) AcpiOsDeleteSemaphore (AcpiGbl_GlobalLockSemaphore);
               AcpiGbl_GlobalLockSemaphore = NULL;
   
               AcpiOsDeleteMutex (Object->Mutex.OsMutex);
               AcpiGbl_GlobalLockMutex = NULL;
           }
           else
           {
               AcpiExUnlinkMutex (Object);
               AcpiOsDeleteMutex (Object->Mutex.OsMutex);
           }
           break;
   
       case ACPI_TYPE_EVENT:
   
           ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
               "***** Event %p, OS Semaphore %p\n",
               Object, Object->Event.OsSemaphore));
   
           (void) AcpiOsDeleteSemaphore (Object->Event.OsSemaphore);
           Object->Event.OsSemaphore = NULL;
           break;
   
       case ACPI_TYPE_METHOD:
   
           ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
               "***** Method %p\n", Object));
   
           /* Delete the method mutex if it exists */
   
           if (Object->Method.Mutex)
           {
               AcpiOsDeleteMutex (Object->Method.Mutex->Mutex.OsMutex);
               AcpiUtDeleteObjectDesc (Object->Method.Mutex);
               Object->Method.Mutex = NULL;
           }
   
           if (Object->Method.Node)
           {
               Object->Method.Node = NULL;
           }
           break;
   
       case ACPI_TYPE_REGION:
   
           ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
               "***** Region %p\n", Object));
   
           /*
            * Update AddressRange list. However, only permanent regions
            * are installed in this list. (Not created within a method)
            */
           if (!(Object->Region.Node->Flags & ANOBJ_TEMPORARY))
           {
               AcpiUtRemoveAddressRange (Object->Region.SpaceId,
                   Object->Region.Node);
           }
   
           SecondDesc = AcpiNsGetSecondaryObject (Object);
           if (SecondDesc)
           {
               /*
                * Free the RegionContext 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.
                */
               HandlerDesc = Object->Region.Handler;
               if (HandlerDesc)
               {
                   NextDesc = HandlerDesc->AddressSpace.RegionList;
                   StartDesc = NextDesc;
                   LastObjPtr = &HandlerDesc->AddressSpace.RegionList;
   
                   /* Remove the region object from the handler list */
   
                   while (NextDesc)
                   {
                       if (NextDesc == Object)
                       {
                           *LastObjPtr = NextDesc->Region.Next;
                           break;
                       }
   
                       /* Walk the linked list of handlers */
   
                       LastObjPtr = &NextDesc->Region.Next;
                       NextDesc = NextDesc->Region.Next;
   
                       /* Prevent infinite loop if list is corrupted */
   
                       if (NextDesc == StartDesc)
                       {
                           ACPI_ERROR ((AE_INFO,
                               "Circular region list in address handler object %p",
                               HandlerDesc));
                           return_VOID;
                       }
                   }
   
                   if (HandlerDesc->AddressSpace.HandlerFlags &
                       ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)
                   {
                       /* Deactivate region and free region context */
   
                       if (HandlerDesc->AddressSpace.Setup)
                       {
                           (void) HandlerDesc->AddressSpace.Setup (Object,
                               ACPI_REGION_DEACTIVATE,
                               HandlerDesc->AddressSpace.Context,
                               &SecondDesc->Extra.RegionContext);
                       }
                   }
   
                   AcpiUtRemoveReference (HandlerDesc);
               }
   
               /* Now we can free the Extra object */
   
               AcpiUtDeleteObjectDesc (SecondDesc);
           }
           if (Object->Field.InternalPccBuffer)
           {
               ACPI_FREE(Object->Field.InternalPccBuffer);
           }
   
           break;
   
       case ACPI_TYPE_BUFFER_FIELD:
   
           ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
               "***** Buffer Field %p\n", Object));
   
           SecondDesc = AcpiNsGetSecondaryObject (Object);
           if (SecondDesc)
           {
               AcpiUtDeleteObjectDesc (SecondDesc);
           }
           break;
   
       case ACPI_TYPE_LOCAL_BANK_FIELD:
   
           ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
               "***** Bank Field %p\n", Object));
   
           SecondDesc = AcpiNsGetSecondaryObject (Object);
           if (SecondDesc)
           {
               AcpiUtDeleteObjectDesc (SecondDesc);
           }
           break;
   
       case ACPI_TYPE_LOCAL_ADDRESS_HANDLER:
   
           ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
               "***** Address handler %p\n", Object));
   
           AcpiOsDeleteMutex (Object->AddressSpace.ContextMutex);
           break;
   
       default:
   
           break;
       }
   
       /* Free any allocated memory (pointer within the object) found above */
   
       if (ObjPointer)
       {
           ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "Deleting Object Subptr %p\n",
               ObjPointer));
           ACPI_FREE (ObjPointer);
       }
   
       /* Now the object can be safely deleted */
   
       ACPI_DEBUG_PRINT_RAW ((ACPI_DB_ALLOCATIONS, "%s: Deleting Object %p [%s]\n",
           ACPI_GET_FUNCTION_NAME, Object, AcpiUtGetObjectTypeName (Object)));
   
       AcpiUtDeleteObjectDesc (Object);
       return_VOID;
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiUtDeleteInternalObjectList
    *
    * PARAMETERS:  ObjList         - Pointer to the list to be deleted
    *
    * RETURN:      None
    *
    * DESCRIPTION: This function deletes an internal object list, including both
    *              simple objects and package objects
    *
    ******************************************************************************/
   
   void
   AcpiUtDeleteInternalObjectList (
       ACPI_OPERAND_OBJECT     **ObjList)
   {
       ACPI_OPERAND_OBJECT     **InternalObj;
   
   
       ACPI_FUNCTION_ENTRY ();
   
   
       /* Walk the null-terminated internal list */
   
       for (InternalObj = ObjList; *InternalObj; InternalObj++)
       {
           AcpiUtRemoveReference (*InternalObj);
       }
   
       /* Free the combined parameter pointer list and object array */
   
       ACPI_FREE (ObjList);
       return;
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiUtUpdateRefCount
    *
    * PARAMETERS:  Object          - Object whose ref count is to be updated
    *              Action          - What to do (REF_INCREMENT or REF_DECREMENT)
    *
    * RETURN:      None. Sets new reference count within the object
    *
    * DESCRIPTION: Modify the reference count for an internal acpi object
    *
    ******************************************************************************/
   
   static void
   AcpiUtUpdateRefCount (
       ACPI_OPERAND_OBJECT     *Object,
       UINT32                  Action)
   {
       UINT16                  OriginalCount;
       UINT16                  NewCount = 0;
       ACPI_CPU_FLAGS          LockFlags;
       char                    *Message;
   
   
       ACPI_FUNCTION_NAME (UtUpdateRefCount);
   
   
       if (!Object)
       {
           return;
       }
   
       /*
        * Always get the reference count lock. Note: Interpreter and/or
        * Namespace is not always locked when this function is called.
        */
       LockFlags = AcpiOsAcquireLock (AcpiGbl_ReferenceCountLock);
       OriginalCount = Object->Common.ReferenceCount;
   
       /* Perform the reference count action (increment, decrement) */
   
       switch (Action)
       {
       case REF_INCREMENT:
   
           NewCount = OriginalCount + 1;
           Object->Common.ReferenceCount = NewCount;
           AcpiOsReleaseLock (AcpiGbl_ReferenceCountLock, LockFlags);
   
           /* The current reference count should never be zero here */
   
           if (!OriginalCount)
           {
               ACPI_WARNING ((AE_INFO,
                   "Obj %p, Reference Count was zero before increment\n",
                   Object));
           }
   
           ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
               "Obj %p Type %.2X [%s] Refs %.2X [Incremented]\n",
               Object, Object->Common.Type,
               AcpiUtGetObjectTypeName (Object), NewCount));
           Message = "Incremement";
           break;
   
       case REF_DECREMENT:
   
           /* The current reference count must be non-zero */
   
           if (OriginalCount)
           {
               NewCount = OriginalCount - 1;
               Object->Common.ReferenceCount = NewCount;
           }
   
           AcpiOsReleaseLock (AcpiGbl_ReferenceCountLock, LockFlags);
   
           if (!OriginalCount)
           {
               ACPI_WARNING ((AE_INFO,
                   "Obj %p, Reference Count is already zero, cannot decrement\n",
                   Object));
               return;
           }
   
           ACPI_DEBUG_PRINT_RAW ((ACPI_DB_ALLOCATIONS,
               "%s: Obj %p Type %.2X Refs %.2X [Decremented]\n",
               ACPI_GET_FUNCTION_NAME, Object, Object->Common.Type, NewCount));
   
           /* Actually delete the object on a reference count of zero */
   
           if (NewCount == 0)
           {
               AcpiUtDeleteInternalObj (Object);
           }
           Message = "Decrement";
           break;
   
       default:
   
           AcpiOsReleaseLock (AcpiGbl_ReferenceCountLock, LockFlags);
           ACPI_ERROR ((AE_INFO, "Unknown Reference Count action (0x%X)",
               Action));
           return;
       }
   
       /*
        * Sanity check the reference count, for debug purposes only.
        * (A deleted object will have a huge reference count)
        */
       if (NewCount > ACPI_MAX_REFERENCE_COUNT)
       {
           ACPI_WARNING ((AE_INFO,
               "Large Reference Count (0x%X) in object %p, Type=0x%.2X Operation=%s",
               NewCount, Object, Object->Common.Type, Message));
       }
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiUtUpdateObjectReference
    *
    * PARAMETERS:  Object              - Increment or decrement the ref count for
    *                                    this object and all sub-objects
    *              Action              - Either REF_INCREMENT or REF_DECREMENT
    *
    * RETURN:      Status
    *
    * DESCRIPTION: Increment or decrement 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
   AcpiUtUpdateObjectReference (
       ACPI_OPERAND_OBJECT     *Object,
       UINT16                  Action)
   {
       ACPI_STATUS             Status = AE_OK;
       ACPI_GENERIC_STATE      *StateList = NULL;
       ACPI_OPERAND_OBJECT     *NextObject = NULL;
       ACPI_OPERAND_OBJECT     *PrevObject;
       ACPI_GENERIC_STATE      *State;
       UINT32                  i;
   
   
       ACPI_FUNCTION_NAME (UtUpdateObjectReference);
   
   
       while (Object)
       {
           /* Make sure that this isn't a namespace handle */
   
           if (ACPI_GET_DESCRIPTOR_TYPE (Object) == ACPI_DESC_TYPE_NAMED)
           {
               ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
                   "Object %p is NS handle\n", Object));
               return (AE_OK);
           }
   
           /*
            * All sub-objects must have their reference count updated
            * also. Different object types have different subobjects.
            */
           switch (Object->Common.Type)
           {
           case ACPI_TYPE_DEVICE:
           case ACPI_TYPE_PROCESSOR:
           case ACPI_TYPE_POWER:
           case ACPI_TYPE_THERMAL:
               /*
                * Update the notify objects for these types (if present)
                * Two lists, system and device notify handlers.
                */
               for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++)
               {
                   PrevObject = Object->CommonNotify.NotifyList[i];
                   while (PrevObject)
                   {
                       NextObject = PrevObject->Notify.Next[i];
                       AcpiUtUpdateRefCount (PrevObject, Action);
                       PrevObject = NextObject;
                   }
               }
               break;
   
           case ACPI_TYPE_PACKAGE:
               /*
                * We must update all the sub-objects of the package,
                * each of whom may have their own sub-objects.
                */
               for (i = 0; i < Object->Package.Count; i++)
               {
                   /*
                    * Null package elements are legal and can be simply
                    * ignored.
                    */
                   NextObject = Object->Package.Elements[i];
                   if (!NextObject)
                   {
                       continue;
                   }
   
                   switch (NextObject->Common.Type)
                   {
                   case ACPI_TYPE_INTEGER:
                   case ACPI_TYPE_STRING:
                   case ACPI_TYPE_BUFFER:
                       /*
                        * For these very simple sub-objects, we can just
                        * update the reference count here and continue.
                        * Greatly increases performance of this operation.
                        */
                       AcpiUtUpdateRefCount (NextObject, Action);
                       break;
   
                   default:
                       /*
                        * For complex sub-objects, push them onto the stack
                        * for later processing (this eliminates recursion.)
                        */
                       Status = AcpiUtCreateUpdateStateAndPush (
                           NextObject, Action, &StateList);
                       if (ACPI_FAILURE (Status))
                       {
                           goto ErrorExit;
                       }
                       break;
                   }
               }
   
               NextObject = NULL;
               break;
   
           case ACPI_TYPE_BUFFER_FIELD:
   
               NextObject = Object->BufferField.BufferObj;
               break;
   
           case ACPI_TYPE_LOCAL_BANK_FIELD:
   
               NextObject = Object->BankField.BankObj;
               Status = AcpiUtCreateUpdateStateAndPush (
                   Object->BankField.RegionObj, Action, &StateList);
               if (ACPI_FAILURE (Status))
               {
                   goto ErrorExit;
               }
               break;
   
           case ACPI_TYPE_LOCAL_INDEX_FIELD:
   
               NextObject = Object->IndexField.IndexObj;
               Status = AcpiUtCreateUpdateStateAndPush (
                   Object->IndexField.DataObj, Action, &StateList);
               if (ACPI_FAILURE (Status))
               {
                   goto ErrorExit;
               }
               break;
   
           case ACPI_TYPE_LOCAL_REFERENCE:
               /*
                * The target of an Index (a package, string, or buffer) or a named
                * reference must track changes to the ref count of the index or
                * target object.
                */
               if ((Object->Reference.Class == ACPI_REFCLASS_INDEX) ||
                   (Object->Reference.Class== ACPI_REFCLASS_NAME))
               {
                   NextObject = Object->Reference.Object;
               }
               break;
   
           case ACPI_TYPE_LOCAL_REGION_FIELD:
           case ACPI_TYPE_REGION:
           default:
   
               break; /* No subobjects for all other types */
           }
   
           /*
            * 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.
            */
           AcpiUtUpdateRefCount (Object, Action);
           Object = NULL;
   
           /* Move on to the next object to be updated */
   
           if (NextObject)
           {
               Object = NextObject;
               NextObject = NULL;
           }
           else if (StateList)
           {
               State = AcpiUtPopGenericState (&StateList);
               Object = State->Update.Object;
               AcpiUtDeleteGenericState (State);
           }
       }
   
       return (AE_OK);
   
   
   ErrorExit:
   
       ACPI_EXCEPTION ((AE_INFO, Status,
           "Could not update object reference count"));
   
       /* Free any stacked Update State objects */
   
       while (StateList)
       {
           State = AcpiUtPopGenericState (&StateList);
           AcpiUtDeleteGenericState (State);
       }
   
       return (Status);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiUtAddReference
    *
    * PARAMETERS:  Object          - Object whose reference count is to be
    *                                incremented
    *
    * RETURN:      None
    *
    * DESCRIPTION: Add one reference to an ACPI object
    *
    ******************************************************************************/
   
   void
   AcpiUtAddReference (
       ACPI_OPERAND_OBJECT     *Object)
   {
   
       ACPI_FUNCTION_NAME (UtAddReference);
   
   
       /* Ensure that we have a valid object */
   
       if (!AcpiUtValidInternalObject (Object))
       {
           return;
       }
   
       ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
           "Obj %p Current Refs=%X [To Be Incremented]\n",
           Object, Object->Common.ReferenceCount));
   
       /* Increment the reference count */
   
       (void) AcpiUtUpdateObjectReference (Object, REF_INCREMENT);
       return;
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiUtRemoveReference
    *
    * PARAMETERS:  Object         - Object whose ref count will be decremented
    *
    * RETURN:      None
    *
    * DESCRIPTION: Decrement the reference count of an ACPI internal object
    *
    ******************************************************************************/
   
   void
   AcpiUtRemoveReference (
       ACPI_OPERAND_OBJECT     *Object)
   {
   
       ACPI_FUNCTION_NAME (UtRemoveReference);
   
   
       /*
        * Allow a NULL pointer to be passed in, just ignore it. This saves
        * each caller from having to check. Also, ignore NS nodes.
        */
       if (!Object ||
           (ACPI_GET_DESCRIPTOR_TYPE (Object) == ACPI_DESC_TYPE_NAMED))
   
       {
           return;
       }
   
       /* Ensure that we have a valid object */
   
       if (!AcpiUtValidInternalObject (Object))
       {
           return;
       }
   
       ACPI_DEBUG_PRINT_RAW ((ACPI_DB_ALLOCATIONS,
           "%s: Obj %p Current Refs=%X [To Be Decremented]\n",
           ACPI_GET_FUNCTION_NAME, Object, Object->Common.ReferenceCount));
   
       /*
        * 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!)
        */
       (void) AcpiUtUpdateObjectReference (Object, REF_DECREMENT);
       return;
   }

Cache object: 6130f096ef6f0604dd436e9b36de8d71