drivers/acpi/acpica/utdelete.c

   1 /*******************************************************************************
   2  *
   3  * Module Name: utdelete - object deletion and reference count utilities
   4  *
   5  ******************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2011, Intel Corp.
   9  * All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions, and the following disclaimer,
  16  *    without modification.
  17  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  18  *    substantially similar to the "NO WARRANTY" disclaimer below
  19  *    ("Disclaimer") and any redistribution must be conditioned upon
  20  *    including a substantially similar Disclaimer requirement for further
  21  *    binary redistribution.
  22  * 3. Neither the names of the above-listed copyright holders nor the names
  23  *    of any contributors may be used to endorse or promote products derived
  24  *    from this software without specific prior written permission.
  25  *
  26  * Alternatively, this software may be distributed under the terms of the
  27  * GNU General Public License ("GPL") version 2 as published by the Free
  28  * Software Foundation.
  29  *
  30  * NO WARRANTY
  31  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  32  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  33  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  34  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  35  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  39  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  40  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  41  * POSSIBILITY OF SUCH DAMAGES.
  42  */
  43
  44 #include <acpi/acpi.h>
  45 #include "accommon.h"
  46 #include "acinterp.h"
  47 #include "acnamesp.h"
  48 #include "acevents.h"
  49
  50 #define _COMPONENT          ACPI_UTILITIES
  51 ACPI_MODULE_NAME("utdelete")
  52
  53 /* Local prototypes */
  54 static void acpi_ut_delete_internal_obj(union acpi_operand_object *object);
  55
  56 static void
  57 acpi_ut_update_ref_count(union acpi_operand_object *object, u32 action);
  58
  59 /*******************************************************************************
  60  *
  61  * FUNCTION:    acpi_ut_delete_internal_obj
  62  *
  63  * PARAMETERS:  Object         - Object to be deleted
  64  *
  65  * RETURN:      None
  66  *
  67  * DESCRIPTION: Low level object deletion, after reference counts have been
  68  *              updated (All reference counts, including sub-objects!)
  69  *
  70  ******************************************************************************/
  71
  72 static void acpi_ut_delete_internal_obj(union acpi_operand_object *object)
  73 {
  74         void *obj_pointer = NULL;
  75         union acpi_operand_object *handler_desc;
  76         union acpi_operand_object *second_desc;
  77         union acpi_operand_object *next_desc;
  78         union acpi_operand_object **last_obj_ptr;
  79
  80         ACPI_FUNCTION_TRACE_PTR(ut_delete_internal_obj, object);
  81
  82         if (!object) {
  83                 return_VOID;
  84         }
  85
  86         /*
  87          * Must delete or free any pointers within the object that are not
  88          * actual ACPI objects (for example, a raw buffer pointer).
  89          */
  90         switch (object->common.type) {
  91         case ACPI_TYPE_STRING:
  92
  93                 ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
  94                                   "**** String %p, ptr %p\n", object,
  95                                   object->string.pointer));
  96
  97                 /* Free the actual string buffer */
  98
  99                 if (!(object->common.flags & AOPOBJ_STATIC_POINTER)) {
 100
 101                         /* But only if it is NOT a pointer into an ACPI table */
 102
 103                         obj_pointer = object->string.pointer;
 104                 }
 105                 break;
 106
 107         case ACPI_TYPE_BUFFER:
 108
 109                 ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
 110                                   "**** Buffer %p, ptr %p\n", object,
 111                                   object->buffer.pointer));
 112
 113                 /* Free the actual buffer */
 114
 115                 if (!(object->common.flags & AOPOBJ_STATIC_POINTER)) {
 116
 117                         /* But only if it is NOT a pointer into an ACPI table */
 118
 119                         obj_pointer = object->buffer.pointer;
 120                 }
 121                 break;
 122
 123         case ACPI_TYPE_PACKAGE:
 124
 125                 ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
 126                                   " **** Package of count %X\n",
 127                                   object->package.count));
 128
 129                 /*
 130                  * Elements of the package are not handled here, they are deleted
 131                  * separately
 132                  */
 133
 134                 /* Free the (variable length) element pointer array */
 135
 136                 obj_pointer = object->package.elements;
 137                 break;
 138
 139                 /*
 140                  * These objects have a possible list of notify handlers.
 141                  * Device object also may have a GPE block.
 142                  */
 143         case ACPI_TYPE_DEVICE:
 144
 145                 if (object->device.gpe_block) {
 146                         (void)acpi_ev_delete_gpe_block(object->device.
 147                                                        gpe_block);
 148                 }
 149
 150                 /*lint -fallthrough */
 151
 152         case ACPI_TYPE_PROCESSOR:
 153         case ACPI_TYPE_THERMAL:
 154
 155                 /* Walk the notify handler list for this object */
 156
 157                 handler_desc = object->common_notify.handler;
 158                 while (handler_desc) {
 159                         next_desc = handler_desc->address_space.next;
 160                         acpi_ut_remove_reference(handler_desc);
 161                         handler_desc = next_desc;
 162                 }
 163                 break;
 164
 165         case ACPI_TYPE_MUTEX:
 166
 167                 ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
 168                                   "***** Mutex %p, OS Mutex %p\n",
 169                                   object, object->mutex.os_mutex));
 170
 171                 if (object == acpi_gbl_global_lock_mutex) {
 172
 173                         /* Global Lock has extra semaphore */
 174
 175                         (void)
 176                             acpi_os_delete_semaphore
 177                             (acpi_gbl_global_lock_semaphore);
 178                         acpi_gbl_global_lock_semaphore = NULL;
 179
 180                         acpi_os_delete_mutex(object->mutex.os_mutex);
 181                         acpi_gbl_global_lock_mutex = NULL;
 182                 } else {
 183                         acpi_ex_unlink_mutex(object);
 184                         acpi_os_delete_mutex(object->mutex.os_mutex);
 185                 }
 186                 break;
 187
 188         case ACPI_TYPE_EVENT:
 189
 190                 ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
 191                                   "***** Event %p, OS Semaphore %p\n",
 192                                   object, object->event.os_semaphore));
 193
 194                 (void)acpi_os_delete_semaphore(object->event.os_semaphore);
 195                 object->event.os_semaphore = NULL;
 196                 break;
 197
 198         case ACPI_TYPE_METHOD:
 199
 200                 ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
 201                                   "***** Method %p\n", object));
 202
 203                 /* Delete the method mutex if it exists */
 204
 205                 if (object->method.mutex) {
 206                         acpi_os_delete_mutex(object->method.mutex->mutex.
 207                                              os_mutex);
 208                         acpi_ut_delete_object_desc(object->method.mutex);
 209                         object->method.mutex = NULL;
 210                 }
 211                 break;
 212
 213         case ACPI_TYPE_REGION:
 214
 215                 ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
 216                                   "***** Region %p\n", object));
 217
 218                 /* Invalidate the region address/length via the host OS */
 219
 220                 acpi_os_invalidate_address(object->region.space_id,
 221                                           object->region.address,
 222                                           (acpi_size) object->region.length);
 223
 224                 second_desc = acpi_ns_get_secondary_object(object);
 225                 if (second_desc) {
 226                         /*
 227                          * Free the region_context if and only if the handler is one of the
 228                          * default handlers -- and therefore, we created the context object
 229                          * locally, it was not created by an external caller.
 230                          */
 231                         handler_desc = object->region.handler;
 232                         if (handler_desc) {
 233                                 next_desc =
 234                                     handler_desc->address_space.region_list;
 235                                 last_obj_ptr =
 236                                     &handler_desc->address_space.region_list;
 237
 238                                 /* Remove the region object from the handler's list */
 239
 240                                 while (next_desc) {
 241                                         if (next_desc == object) {
 242                                                 *last_obj_ptr =
 243                                                     next_desc->region.next;
 244                                                 break;
 245                                         }
 246
 247                                         /* Walk the linked list of handler */
 248
 249                                         last_obj_ptr = &next_desc->region.next;
 250                                         next_desc = next_desc->region.next;
 251                                 }
 252
 253                                 if (handler_desc->address_space.handler_flags &
 254                                     ACPI_ADDR_HANDLER_DEFAULT_INSTALLED) {
 255
 256                                         /* Deactivate region and free region context */
 257
 258                                         if (handler_desc->address_space.setup) {
 259                                                 (void)handler_desc->
 260                                                     address_space.setup(object,
 261                                                                         ACPI_REGION_DEACTIVATE,
 262                                                                         handler_desc->
 263                                                                         address_space.
 264                                                                         context,
 265                                                                         &second_desc->
 266                                                                         extra.
 267                                                                         region_context);
 268                                         }
 269                                 }
 270
 271                                 acpi_ut_remove_reference(handler_desc);
 272                         }
 273
 274                         /* Now we can free the Extra object */
 275
 276                         acpi_ut_delete_object_desc(second_desc);
 277                 }
 278                 break;
 279
 280         case ACPI_TYPE_BUFFER_FIELD:
 281
 282                 ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
 283                                   "***** Buffer Field %p\n", object));
 284
 285                 second_desc = acpi_ns_get_secondary_object(object);
 286                 if (second_desc) {
 287                         acpi_ut_delete_object_desc(second_desc);
 288                 }
 289                 break;
 290
 291         case ACPI_TYPE_LOCAL_BANK_FIELD:
 292
 293                 ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
 294                                   "***** Bank Field %p\n", object));
 295
 296                 second_desc = acpi_ns_get_secondary_object(object);
 297                 if (second_desc) {
 298                         acpi_ut_delete_object_desc(second_desc);
 299                 }
 300                 break;
 301
 302         default:
 303                 break;
 304         }
 305
 306         /* Free any allocated memory (pointer within the object) found above */
 307
 308         if (obj_pointer) {
 309                 ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
 310                                   "Deleting Object Subptr %p\n", obj_pointer));
 311                 ACPI_FREE(obj_pointer);
 312         }
 313
 314         /* Now the object can be safely deleted */
 315
 316         ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, "Deleting Object %p [%s]\n",
 317                           object, acpi_ut_get_object_type_name(object)));
 318
 319         acpi_ut_delete_object_desc(object);
 320         return_VOID;
 321 }
 322
 323 /*******************************************************************************
 324  *
 325  * FUNCTION:    acpi_ut_delete_internal_object_list
 326  *
 327  * PARAMETERS:  obj_list        - Pointer to the list to be deleted
 328  *
 329  * RETURN:      None
 330  *
 331  * DESCRIPTION: This function deletes an internal object list, including both
 332  *              simple objects and package objects
 333  *
 334  ******************************************************************************/
 335
 336 void acpi_ut_delete_internal_object_list(union acpi_operand_object **obj_list)
 337 {
 338         union acpi_operand_object **internal_obj;
 339
 340         ACPI_FUNCTION_TRACE(ut_delete_internal_object_list);
 341
 342         /* Walk the null-terminated internal list */
 343
 344         for (internal_obj = obj_list; *internal_obj; internal_obj++) {
 345                 acpi_ut_remove_reference(*internal_obj);
 346         }
 347
 348         /* Free the combined parameter pointer list and object array */
 349
 350         ACPI_FREE(obj_list);
 351         return_VOID;
 352 }
 353
 354 /*******************************************************************************
 355  *
 356  * FUNCTION:    acpi_ut_update_ref_count
 357  *
 358  * PARAMETERS:  Object          - Object whose ref count is to be updated
 359  *              Action          - What to do
 360  *
 361  * RETURN:      New ref count
 362  *
 363  * DESCRIPTION: Modify the ref count and return it.
 364  *
 365  ******************************************************************************/
 366
 367 static void
 368 acpi_ut_update_ref_count(union acpi_operand_object *object, u32 action)
 369 {
 370         u16 count;
 371         u16 new_count;
 372
 373         ACPI_FUNCTION_NAME(ut_update_ref_count);
 374
 375         if (!object) {
 376                 return;
 377         }
 378
 379         count = object->common.reference_count;
 380         new_count = count;
 381
 382         /*
 383          * Perform the reference count action (increment, decrement, force delete)
 384          */
 385         switch (action) {
 386         case REF_INCREMENT:
 387
 388                 new_count++;
 389                 object->common.reference_count = new_count;
 390
 391                 ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
 392                                   "Obj %p Refs=%X, [Incremented]\n",
 393                                   object, new_count));
 394                 break;
 395
 396         case REF_DECREMENT:
 397
 398                 if (count < 1) {
 399                         ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
 400                                           "Obj %p Refs=%X, can't decrement! (Set to 0)\n",
 401                                           object, new_count));
 402
 403                         new_count = 0;
 404                 } else {
 405                         new_count--;
 406
 407                         ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
 408                                           "Obj %p Refs=%X, [Decremented]\n",
 409                                           object, new_count));
 410                 }
 411
 412                 if (object->common.type == ACPI_TYPE_METHOD) {
 413                         ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
 414                                           "Method Obj %p Refs=%X, [Decremented]\n",
 415                                           object, new_count));
 416                 }
 417
 418                 object->common.reference_count = new_count;
 419                 if (new_count == 0) {
 420                         acpi_ut_delete_internal_obj(object);
 421                 }
 422                 break;
 423
 424         case REF_FORCE_DELETE:
 425
 426                 ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
 427                                   "Obj %p Refs=%X, Force delete! (Set to 0)\n",
 428                                   object, count));
 429
 430                 new_count = 0;
 431                 object->common.reference_count = new_count;
 432                 acpi_ut_delete_internal_obj(object);
 433                 break;
 434
 435         default:
 436
 437                 ACPI_ERROR((AE_INFO, "Unknown action (0x%X)", action));
 438                 break;
 439         }
 440
 441         /*
 442          * Sanity check the reference count, for debug purposes only.
 443          * (A deleted object will have a huge reference count)
 444          */
 445         if (count > ACPI_MAX_REFERENCE_COUNT) {
 446                 ACPI_WARNING((AE_INFO,
 447                               "Large Reference Count (0x%X) in object %p",
 448                               count, object));
 449         }
 450 }
 451
 452 /*******************************************************************************
 453  *
 454  * FUNCTION:    acpi_ut_update_object_reference
 455  *
 456  * PARAMETERS:  Object              - Increment ref count for this object
 457  *                                    and all sub-objects
 458  *              Action              - Either REF_INCREMENT or REF_DECREMENT or
 459  *                                    REF_FORCE_DELETE
 460  *
 461  * RETURN:      Status
 462  *
 463  * DESCRIPTION: Increment the object reference count
 464  *
 465  * Object references are incremented when:
 466  * 1) An object is attached to a Node (namespace object)
 467  * 2) An object is copied (all subobjects must be incremented)
 468  *
 469  * Object references are decremented when:
 470  * 1) An object is detached from an Node
 471  *
 472  ******************************************************************************/
 473
 474 acpi_status
 475 acpi_ut_update_object_reference(union acpi_operand_object *object, u16 action)
 476 {
 477         acpi_status status = AE_OK;
 478         union acpi_generic_state *state_list = NULL;
 479         union acpi_operand_object *next_object = NULL;
 480         union acpi_generic_state *state;
 481         u32 i;
 482
 483         ACPI_FUNCTION_TRACE_PTR(ut_update_object_reference, object);
 484
 485         while (object) {
 486
 487                 /* Make sure that this isn't a namespace handle */
 488
 489                 if (ACPI_GET_DESCRIPTOR_TYPE(object) == ACPI_DESC_TYPE_NAMED) {
 490                         ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
 491                                           "Object %p is NS handle\n", object));
 492                         return_ACPI_STATUS(AE_OK);
 493                 }
 494
 495                 /*
 496                  * All sub-objects must have their reference count incremented also.
 497                  * Different object types have different subobjects.
 498                  */
 499                 switch (object->common.type) {
 500                 case ACPI_TYPE_DEVICE:
 501                 case ACPI_TYPE_PROCESSOR:
 502                 case ACPI_TYPE_POWER:
 503                 case ACPI_TYPE_THERMAL:
 504
 505                         /* Update the notify objects for these types (if present) */
 506
 507                         acpi_ut_update_ref_count(object->common_notify.
 508                                                  system_notify, action);
 509                         acpi_ut_update_ref_count(object->common_notify.
 510                                                  device_notify, action);
 511                         break;
 512
 513                 case ACPI_TYPE_PACKAGE:
 514                         /*
 515                          * We must update all the sub-objects of the package,
 516                          * each of whom may have their own sub-objects.
 517                          */
 518                         for (i = 0; i < object->package.count; i++) {
 519                                 /*
 520                                  * Push each element onto the stack for later processing.
 521                                  * Note: There can be null elements within the package,
 522                                  * these are simply ignored
 523                                  */
 524                                 status =
 525                                     acpi_ut_create_update_state_and_push
 526                                     (object->package.elements[i], action,
 527                                      &state_list);
 528                                 if (ACPI_FAILURE(status)) {
 529                                         goto error_exit;
 530                                 }
 531                         }
 532                         break;
 533
 534                 case ACPI_TYPE_BUFFER_FIELD:
 535
 536                         next_object = object->buffer_field.buffer_obj;
 537                         break;
 538
 539                 case ACPI_TYPE_LOCAL_REGION_FIELD:
 540
 541                         next_object = object->field.region_obj;
 542                         break;
 543
 544                 case ACPI_TYPE_LOCAL_BANK_FIELD:
 545
 546                         next_object = object->bank_field.bank_obj;
 547                         status =
 548                             acpi_ut_create_update_state_and_push(object->
 549                                                                  bank_field.
 550                                                                  region_obj,
 551                                                                  action,
 552                                                                  &state_list);
 553                         if (ACPI_FAILURE(status)) {
 554                                 goto error_exit;
 555                         }
 556                         break;
 557
 558                 case ACPI_TYPE_LOCAL_INDEX_FIELD:
 559
 560                         next_object = object->index_field.index_obj;
 561                         status =
 562                             acpi_ut_create_update_state_and_push(object->
 563                                                                  index_field.
 564                                                                  data_obj,
 565                                                                  action,
 566                                                                  &state_list);
 567                         if (ACPI_FAILURE(status)) {
 568                                 goto error_exit;
 569                         }
 570                         break;
 571
 572                 case ACPI_TYPE_LOCAL_REFERENCE:
 573                         /*
 574                          * The target of an Index (a package, string, or buffer) or a named
 575                          * reference must track changes to the ref count of the index or
 576                          * target object.
 577                          */
 578                         if ((object->reference.class == ACPI_REFCLASS_INDEX) ||
 579                             (object->reference.class == ACPI_REFCLASS_NAME)) {
 580                                 next_object = object->reference.object;
 581                         }
 582                         break;
 583
 584                 case ACPI_TYPE_REGION:
 585                 default:
 586                         break;  /* No subobjects for all other types */
 587                 }
 588
 589                 /*
 590                  * Now we can update the count in the main object. This can only
 591                  * happen after we update the sub-objects in case this causes the
 592                  * main object to be deleted.
 593                  */
 594                 acpi_ut_update_ref_count(object, action);
 595                 object = NULL;
 596
 597                 /* Move on to the next object to be updated */
 598
 599                 if (next_object) {
 600                         object = next_object;
 601                         next_object = NULL;
 602                 } else if (state_list) {
 603                         state = acpi_ut_pop_generic_state(&state_list);
 604                         object = state->update.object;
 605                         acpi_ut_delete_generic_state(state);
 606                 }
 607         }
 608
 609         return_ACPI_STATUS(AE_OK);
 610
 611       error_exit:
 612
 613         ACPI_EXCEPTION((AE_INFO, status,
 614                         "Could not update object reference count"));
 615
 616         /* Free any stacked Update State objects */
 617
 618         while (state_list) {
 619                 state = acpi_ut_pop_generic_state(&state_list);
 620                 acpi_ut_delete_generic_state(state);
 621         }
 622
 623         return_ACPI_STATUS(status);
 624 }
 625
 626 /*******************************************************************************
 627  *
 628  * FUNCTION:    acpi_ut_add_reference
 629  *
 630  * PARAMETERS:  Object          - Object whose reference count is to be
 631  *                                incremented
 632  *
 633  * RETURN:      None
 634  *
 635  * DESCRIPTION: Add one reference to an ACPI object
 636  *
 637  ******************************************************************************/
 638
 639 void acpi_ut_add_reference(union acpi_operand_object *object)
 640 {
 641
 642         ACPI_FUNCTION_TRACE_PTR(ut_add_reference, object);
 643
 644         /* Ensure that we have a valid object */
 645
 646         if (!acpi_ut_valid_internal_object(object)) {
 647                 return_VOID;
 648         }
 649
 650         ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
 651                           "Obj %p Current Refs=%X [To Be Incremented]\n",
 652                           object, object->common.reference_count));
 653
 654         /* Increment the reference count */
 655
 656         (void)acpi_ut_update_object_reference(object, REF_INCREMENT);
 657         return_VOID;
 658 }
 659
 660 /*******************************************************************************
 661  *
 662  * FUNCTION:    acpi_ut_remove_reference
 663  *
 664  * PARAMETERS:  Object         - Object whose ref count will be decremented
 665  *
 666  * RETURN:      None
 667  *
 668  * DESCRIPTION: Decrement the reference count of an ACPI internal object
 669  *
 670  ******************************************************************************/
 671
 672 void acpi_ut_remove_reference(union acpi_operand_object *object)
 673 {
 674
 675         ACPI_FUNCTION_TRACE_PTR(ut_remove_reference, object);
 676
 677         /*
 678          * Allow a NULL pointer to be passed in, just ignore it. This saves
 679          * each caller from having to check. Also, ignore NS nodes.
 680          *
 681          */
 682         if (!object ||
 683             (ACPI_GET_DESCRIPTOR_TYPE(object) == ACPI_DESC_TYPE_NAMED)) {
 684                 return_VOID;
 685         }
 686
 687         /* Ensure that we have a valid object */
 688
 689         if (!acpi_ut_valid_internal_object(object)) {
 690                 return_VOID;
 691         }
 692
 693         ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
 694                           "Obj %p Current Refs=%X [To Be Decremented]\n",
 695                           object, object->common.reference_count));
 696
 697         /*
 698          * Decrement the reference count, and only actually delete the object
 699          * if the reference count becomes 0. (Must also decrement the ref count
 700          * of all subobjects!)
 701          */
 702         (void)acpi_ut_update_object_reference(object, REF_DECREMENT);
 703         return_VOID;
 704 }