Commit | Line | Data |
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1da177e4 LT |
1 | /******************************************************************************* |
2 | * | |
3 | * Module Name: utdelete - object deletion and reference count utilities | |
4 | * | |
5 | ******************************************************************************/ | |
6 | ||
7 | /* | |
4a90c7e8 | 8 | * Copyright (C) 2000 - 2006, R. Byron Moore |
1da177e4 LT |
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 | ||
1da177e4 LT |
44 | #include <acpi/acpi.h> |
45 | #include <acpi/acinterp.h> | |
46 | #include <acpi/acnamesp.h> | |
47 | #include <acpi/acevents.h> | |
48 | #include <acpi/amlcode.h> | |
49 | ||
50 | #define _COMPONENT ACPI_UTILITIES | |
4be44fcd | 51 | ACPI_MODULE_NAME("utdelete") |
1da177e4 | 52 | |
44f6c012 | 53 | /* Local prototypes */ |
4be44fcd | 54 | static void acpi_ut_delete_internal_obj(union acpi_operand_object *object); |
44f6c012 RM |
55 | |
56 | static void | |
4be44fcd | 57 | acpi_ut_update_ref_count(union acpi_operand_object *object, u32 action); |
1da177e4 LT |
58 | |
59 | /******************************************************************************* | |
60 | * | |
61 | * FUNCTION: acpi_ut_delete_internal_obj | |
62 | * | |
44f6c012 | 63 | * PARAMETERS: Object - Object to be deleted |
1da177e4 LT |
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 | ||
4be44fcd | 72 | static void acpi_ut_delete_internal_obj(union acpi_operand_object *object) |
1da177e4 | 73 | { |
4be44fcd LB |
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; | |
1da177e4 | 78 | |
4be44fcd | 79 | ACPI_FUNCTION_TRACE_PTR("ut_delete_internal_obj", object); |
1da177e4 LT |
80 | |
81 | if (!object) { | |
82 | return_VOID; | |
83 | } | |
84 | ||
85 | /* | |
86 | * Must delete or free any pointers within the object that are not | |
87 | * actual ACPI objects (for example, a raw buffer pointer). | |
88 | */ | |
4be44fcd | 89 | switch (ACPI_GET_OBJECT_TYPE(object)) { |
1da177e4 LT |
90 | case ACPI_TYPE_STRING: |
91 | ||
4be44fcd LB |
92 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
93 | "**** String %p, ptr %p\n", object, | |
94 | object->string.pointer)); | |
1da177e4 LT |
95 | |
96 | /* Free the actual string buffer */ | |
97 | ||
98 | if (!(object->common.flags & AOPOBJ_STATIC_POINTER)) { | |
99 | /* But only if it is NOT a pointer into an ACPI table */ | |
100 | ||
101 | obj_pointer = object->string.pointer; | |
102 | } | |
103 | break; | |
104 | ||
1da177e4 LT |
105 | case ACPI_TYPE_BUFFER: |
106 | ||
4be44fcd LB |
107 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
108 | "**** Buffer %p, ptr %p\n", object, | |
109 | object->buffer.pointer)); | |
1da177e4 LT |
110 | |
111 | /* Free the actual buffer */ | |
112 | ||
113 | if (!(object->common.flags & AOPOBJ_STATIC_POINTER)) { | |
114 | /* But only if it is NOT a pointer into an ACPI table */ | |
115 | ||
116 | obj_pointer = object->buffer.pointer; | |
117 | } | |
118 | break; | |
119 | ||
1da177e4 LT |
120 | case ACPI_TYPE_PACKAGE: |
121 | ||
4be44fcd LB |
122 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
123 | " **** Package of count %X\n", | |
124 | object->package.count)); | |
1da177e4 LT |
125 | |
126 | /* | |
127 | * Elements of the package are not handled here, they are deleted | |
128 | * separately | |
129 | */ | |
130 | ||
131 | /* Free the (variable length) element pointer array */ | |
132 | ||
133 | obj_pointer = object->package.elements; | |
134 | break; | |
135 | ||
1da177e4 LT |
136 | case ACPI_TYPE_DEVICE: |
137 | ||
138 | if (object->device.gpe_block) { | |
4be44fcd LB |
139 | (void)acpi_ev_delete_gpe_block(object->device. |
140 | gpe_block); | |
1da177e4 LT |
141 | } |
142 | ||
143 | /* Walk the handler list for this device */ | |
144 | ||
145 | handler_desc = object->device.handler; | |
146 | while (handler_desc) { | |
147 | next_desc = handler_desc->address_space.next; | |
4be44fcd | 148 | acpi_ut_remove_reference(handler_desc); |
1da177e4 LT |
149 | handler_desc = next_desc; |
150 | } | |
151 | break; | |
152 | ||
1da177e4 LT |
153 | case ACPI_TYPE_MUTEX: |
154 | ||
4be44fcd LB |
155 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
156 | "***** Mutex %p, Semaphore %p\n", | |
157 | object, object->mutex.semaphore)); | |
1da177e4 | 158 | |
4be44fcd LB |
159 | acpi_ex_unlink_mutex(object); |
160 | (void)acpi_os_delete_semaphore(object->mutex.semaphore); | |
1da177e4 LT |
161 | break; |
162 | ||
1da177e4 LT |
163 | case ACPI_TYPE_EVENT: |
164 | ||
4be44fcd LB |
165 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
166 | "***** Event %p, Semaphore %p\n", | |
167 | object, object->event.semaphore)); | |
1da177e4 | 168 | |
4be44fcd | 169 | (void)acpi_os_delete_semaphore(object->event.semaphore); |
1da177e4 LT |
170 | object->event.semaphore = NULL; |
171 | break; | |
172 | ||
1da177e4 LT |
173 | case ACPI_TYPE_METHOD: |
174 | ||
4be44fcd LB |
175 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
176 | "***** Method %p\n", object)); | |
1da177e4 LT |
177 | |
178 | /* Delete the method semaphore if it exists */ | |
179 | ||
180 | if (object->method.semaphore) { | |
4be44fcd LB |
181 | (void)acpi_os_delete_semaphore(object->method. |
182 | semaphore); | |
1da177e4 LT |
183 | object->method.semaphore = NULL; |
184 | } | |
185 | break; | |
186 | ||
1da177e4 LT |
187 | case ACPI_TYPE_REGION: |
188 | ||
4be44fcd LB |
189 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
190 | "***** Region %p\n", object)); | |
1da177e4 | 191 | |
4be44fcd | 192 | second_desc = acpi_ns_get_secondary_object(object); |
1da177e4 LT |
193 | if (second_desc) { |
194 | /* | |
195 | * Free the region_context if and only if the handler is one of the | |
196 | * default handlers -- and therefore, we created the context object | |
197 | * locally, it was not created by an external caller. | |
198 | */ | |
199 | handler_desc = object->region.handler; | |
200 | if (handler_desc) { | |
4be44fcd LB |
201 | if (handler_desc->address_space. |
202 | hflags & | |
203 | ACPI_ADDR_HANDLER_DEFAULT_INSTALLED) { | |
204 | obj_pointer = | |
205 | second_desc->extra.region_context; | |
1da177e4 LT |
206 | } |
207 | ||
4be44fcd | 208 | acpi_ut_remove_reference(handler_desc); |
1da177e4 LT |
209 | } |
210 | ||
211 | /* Now we can free the Extra object */ | |
212 | ||
4be44fcd | 213 | acpi_ut_delete_object_desc(second_desc); |
1da177e4 LT |
214 | } |
215 | break; | |
216 | ||
1da177e4 LT |
217 | case ACPI_TYPE_BUFFER_FIELD: |
218 | ||
4be44fcd LB |
219 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
220 | "***** Buffer Field %p\n", object)); | |
1da177e4 | 221 | |
4be44fcd | 222 | second_desc = acpi_ns_get_secondary_object(object); |
1da177e4 | 223 | if (second_desc) { |
4be44fcd | 224 | acpi_ut_delete_object_desc(second_desc); |
1da177e4 LT |
225 | } |
226 | break; | |
227 | ||
1da177e4 LT |
228 | default: |
229 | break; | |
230 | } | |
231 | ||
232 | /* Free any allocated memory (pointer within the object) found above */ | |
233 | ||
234 | if (obj_pointer) { | |
4be44fcd LB |
235 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
236 | "Deleting Object Subptr %p\n", obj_pointer)); | |
237 | ACPI_MEM_FREE(obj_pointer); | |
1da177e4 LT |
238 | } |
239 | ||
240 | /* Now the object can be safely deleted */ | |
241 | ||
4be44fcd LB |
242 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, "Deleting Object %p [%s]\n", |
243 | object, acpi_ut_get_object_type_name(object))); | |
1da177e4 | 244 | |
4be44fcd | 245 | acpi_ut_delete_object_desc(object); |
1da177e4 LT |
246 | return_VOID; |
247 | } | |
248 | ||
1da177e4 LT |
249 | /******************************************************************************* |
250 | * | |
251 | * FUNCTION: acpi_ut_delete_internal_object_list | |
252 | * | |
44f6c012 | 253 | * PARAMETERS: obj_list - Pointer to the list to be deleted |
1da177e4 LT |
254 | * |
255 | * RETURN: None | |
256 | * | |
257 | * DESCRIPTION: This function deletes an internal object list, including both | |
258 | * simple objects and package objects | |
259 | * | |
260 | ******************************************************************************/ | |
261 | ||
4be44fcd | 262 | void acpi_ut_delete_internal_object_list(union acpi_operand_object **obj_list) |
1da177e4 | 263 | { |
4be44fcd | 264 | union acpi_operand_object **internal_obj; |
1da177e4 | 265 | |
4be44fcd | 266 | ACPI_FUNCTION_TRACE("ut_delete_internal_object_list"); |
1da177e4 LT |
267 | |
268 | /* Walk the null-terminated internal list */ | |
269 | ||
270 | for (internal_obj = obj_list; *internal_obj; internal_obj++) { | |
4be44fcd | 271 | acpi_ut_remove_reference(*internal_obj); |
1da177e4 LT |
272 | } |
273 | ||
274 | /* Free the combined parameter pointer list and object array */ | |
275 | ||
4be44fcd | 276 | ACPI_MEM_FREE(obj_list); |
1da177e4 LT |
277 | return_VOID; |
278 | } | |
279 | ||
1da177e4 LT |
280 | /******************************************************************************* |
281 | * | |
282 | * FUNCTION: acpi_ut_update_ref_count | |
283 | * | |
44f6c012 | 284 | * PARAMETERS: Object - Object whose ref count is to be updated |
1da177e4 LT |
285 | * Action - What to do |
286 | * | |
287 | * RETURN: New ref count | |
288 | * | |
289 | * DESCRIPTION: Modify the ref count and return it. | |
290 | * | |
291 | ******************************************************************************/ | |
292 | ||
293 | static void | |
4be44fcd | 294 | acpi_ut_update_ref_count(union acpi_operand_object *object, u32 action) |
1da177e4 | 295 | { |
4be44fcd LB |
296 | u16 count; |
297 | u16 new_count; | |
1da177e4 | 298 | |
4be44fcd | 299 | ACPI_FUNCTION_NAME("ut_update_ref_count"); |
1da177e4 LT |
300 | |
301 | if (!object) { | |
302 | return; | |
303 | } | |
304 | ||
305 | count = object->common.reference_count; | |
306 | new_count = count; | |
307 | ||
308 | /* | |
44f6c012 RM |
309 | * Perform the reference count action |
310 | * (increment, decrement, or force delete) | |
1da177e4 LT |
311 | */ |
312 | switch (action) { | |
313 | ||
314 | case REF_INCREMENT: | |
315 | ||
316 | new_count++; | |
317 | object->common.reference_count = new_count; | |
318 | ||
4be44fcd LB |
319 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
320 | "Obj %p Refs=%X, [Incremented]\n", | |
321 | object, new_count)); | |
1da177e4 LT |
322 | break; |
323 | ||
1da177e4 LT |
324 | case REF_DECREMENT: |
325 | ||
326 | if (count < 1) { | |
4be44fcd LB |
327 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
328 | "Obj %p Refs=%X, can't decrement! (Set to 0)\n", | |
329 | object, new_count)); | |
1da177e4 LT |
330 | |
331 | new_count = 0; | |
4be44fcd | 332 | } else { |
1da177e4 LT |
333 | new_count--; |
334 | ||
4be44fcd LB |
335 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
336 | "Obj %p Refs=%X, [Decremented]\n", | |
337 | object, new_count)); | |
1da177e4 LT |
338 | } |
339 | ||
4be44fcd LB |
340 | if (ACPI_GET_OBJECT_TYPE(object) == ACPI_TYPE_METHOD) { |
341 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, | |
342 | "Method Obj %p Refs=%X, [Decremented]\n", | |
343 | object, new_count)); | |
1da177e4 LT |
344 | } |
345 | ||
346 | object->common.reference_count = new_count; | |
347 | if (new_count == 0) { | |
4be44fcd | 348 | acpi_ut_delete_internal_obj(object); |
1da177e4 LT |
349 | } |
350 | ||
351 | break; | |
352 | ||
1da177e4 LT |
353 | case REF_FORCE_DELETE: |
354 | ||
4be44fcd LB |
355 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
356 | "Obj %p Refs=%X, Force delete! (Set to 0)\n", | |
357 | object, count)); | |
1da177e4 LT |
358 | |
359 | new_count = 0; | |
360 | object->common.reference_count = new_count; | |
4be44fcd | 361 | acpi_ut_delete_internal_obj(object); |
1da177e4 LT |
362 | break; |
363 | ||
1da177e4 LT |
364 | default: |
365 | ||
b8e4d893 | 366 | ACPI_ERROR((AE_INFO, "Unknown action (%X)", action)); |
1da177e4 LT |
367 | break; |
368 | } | |
369 | ||
370 | /* | |
371 | * Sanity check the reference count, for debug purposes only. | |
372 | * (A deleted object will have a huge reference count) | |
373 | */ | |
374 | if (count > ACPI_MAX_REFERENCE_COUNT) { | |
375 | ||
b8e4d893 BM |
376 | ACPI_WARNING((AE_INFO, |
377 | "Large Reference Count (%X) in object %p", | |
378 | count, object)); | |
1da177e4 LT |
379 | } |
380 | ||
381 | return; | |
382 | } | |
383 | ||
1da177e4 LT |
384 | /******************************************************************************* |
385 | * | |
386 | * FUNCTION: acpi_ut_update_object_reference | |
387 | * | |
44f6c012 | 388 | * PARAMETERS: Object - Increment ref count for this object |
1da177e4 LT |
389 | * and all sub-objects |
390 | * Action - Either REF_INCREMENT or REF_DECREMENT or | |
391 | * REF_FORCE_DELETE | |
392 | * | |
393 | * RETURN: Status | |
394 | * | |
395 | * DESCRIPTION: Increment the object reference count | |
396 | * | |
397 | * Object references are incremented when: | |
398 | * 1) An object is attached to a Node (namespace object) | |
399 | * 2) An object is copied (all subobjects must be incremented) | |
400 | * | |
401 | * Object references are decremented when: | |
402 | * 1) An object is detached from an Node | |
403 | * | |
404 | ******************************************************************************/ | |
405 | ||
406 | acpi_status | |
4be44fcd | 407 | acpi_ut_update_object_reference(union acpi_operand_object * object, u16 action) |
1da177e4 | 408 | { |
4be44fcd LB |
409 | acpi_status status = AE_OK; |
410 | union acpi_generic_state *state_list = NULL; | |
411 | union acpi_operand_object *next_object = NULL; | |
412 | union acpi_generic_state *state; | |
413 | acpi_native_uint i; | |
1da177e4 | 414 | |
4be44fcd | 415 | ACPI_FUNCTION_TRACE_PTR("ut_update_object_reference", object); |
1da177e4 | 416 | |
f9f4601f RM |
417 | while (object) { |
418 | /* Make sure that this isn't a namespace handle */ | |
1da177e4 | 419 | |
4be44fcd LB |
420 | if (ACPI_GET_DESCRIPTOR_TYPE(object) == ACPI_DESC_TYPE_NAMED) { |
421 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, | |
422 | "Object %p is NS handle\n", object)); | |
423 | return_ACPI_STATUS(AE_OK); | |
f9f4601f | 424 | } |
1da177e4 LT |
425 | |
426 | /* | |
427 | * All sub-objects must have their reference count incremented also. | |
428 | * Different object types have different subobjects. | |
429 | */ | |
4be44fcd | 430 | switch (ACPI_GET_OBJECT_TYPE(object)) { |
1da177e4 LT |
431 | case ACPI_TYPE_DEVICE: |
432 | ||
4be44fcd LB |
433 | acpi_ut_update_ref_count(object->device.system_notify, |
434 | action); | |
435 | acpi_ut_update_ref_count(object->device.device_notify, | |
436 | action); | |
1da177e4 LT |
437 | break; |
438 | ||
1da177e4 | 439 | case ACPI_TYPE_PACKAGE: |
1da177e4 | 440 | /* |
f9f4601f RM |
441 | * We must update all the sub-objects of the package, |
442 | * each of whom may have their own sub-objects. | |
1da177e4 LT |
443 | */ |
444 | for (i = 0; i < object->package.count; i++) { | |
445 | /* | |
446 | * Push each element onto the stack for later processing. | |
447 | * Note: There can be null elements within the package, | |
448 | * these are simply ignored | |
449 | */ | |
4be44fcd LB |
450 | status = |
451 | acpi_ut_create_update_state_and_push | |
452 | (object->package.elements[i], action, | |
453 | &state_list); | |
454 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
455 | goto error_exit; |
456 | } | |
1da177e4 LT |
457 | } |
458 | break; | |
459 | ||
1da177e4 LT |
460 | case ACPI_TYPE_BUFFER_FIELD: |
461 | ||
f9f4601f | 462 | next_object = object->buffer_field.buffer_obj; |
1da177e4 LT |
463 | break; |
464 | ||
1da177e4 LT |
465 | case ACPI_TYPE_LOCAL_REGION_FIELD: |
466 | ||
f9f4601f RM |
467 | next_object = object->field.region_obj; |
468 | break; | |
1da177e4 LT |
469 | |
470 | case ACPI_TYPE_LOCAL_BANK_FIELD: | |
471 | ||
f9f4601f | 472 | next_object = object->bank_field.bank_obj; |
4be44fcd LB |
473 | status = |
474 | acpi_ut_create_update_state_and_push(object-> | |
475 | bank_field. | |
476 | region_obj, | |
477 | action, | |
478 | &state_list); | |
479 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
480 | goto error_exit; |
481 | } | |
1da177e4 LT |
482 | break; |
483 | ||
1da177e4 LT |
484 | case ACPI_TYPE_LOCAL_INDEX_FIELD: |
485 | ||
f9f4601f | 486 | next_object = object->index_field.index_obj; |
4be44fcd LB |
487 | status = |
488 | acpi_ut_create_update_state_and_push(object-> | |
489 | index_field. | |
490 | data_obj, | |
491 | action, | |
492 | &state_list); | |
493 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
494 | goto error_exit; |
495 | } | |
1da177e4 LT |
496 | break; |
497 | ||
1da177e4 | 498 | case ACPI_TYPE_LOCAL_REFERENCE: |
1da177e4 LT |
499 | /* |
500 | * The target of an Index (a package, string, or buffer) must track | |
501 | * changes to the ref count of the index. | |
502 | */ | |
503 | if (object->reference.opcode == AML_INDEX_OP) { | |
f9f4601f | 504 | next_object = object->reference.object; |
1da177e4 LT |
505 | } |
506 | break; | |
507 | ||
1da177e4 LT |
508 | case ACPI_TYPE_REGION: |
509 | default: | |
4be44fcd | 510 | break; /* No subobjects */ |
1da177e4 LT |
511 | } |
512 | ||
513 | /* | |
514 | * Now we can update the count in the main object. This can only | |
515 | * happen after we update the sub-objects in case this causes the | |
516 | * main object to be deleted. | |
517 | */ | |
4be44fcd | 518 | acpi_ut_update_ref_count(object, action); |
f9f4601f | 519 | object = NULL; |
1da177e4 LT |
520 | |
521 | /* Move on to the next object to be updated */ | |
522 | ||
f9f4601f RM |
523 | if (next_object) { |
524 | object = next_object; | |
525 | next_object = NULL; | |
4be44fcd LB |
526 | } else if (state_list) { |
527 | state = acpi_ut_pop_generic_state(&state_list); | |
f9f4601f | 528 | object = state->update.object; |
4be44fcd | 529 | acpi_ut_delete_generic_state(state); |
f9f4601f | 530 | } |
1da177e4 LT |
531 | } |
532 | ||
4be44fcd | 533 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 534 | |
4be44fcd | 535 | error_exit: |
1da177e4 | 536 | |
b8e4d893 BM |
537 | ACPI_EXCEPTION((AE_INFO, status, |
538 | "Could not update object reference count")); | |
1da177e4 | 539 | |
4be44fcd | 540 | return_ACPI_STATUS(status); |
1da177e4 LT |
541 | } |
542 | ||
1da177e4 LT |
543 | /******************************************************************************* |
544 | * | |
545 | * FUNCTION: acpi_ut_add_reference | |
546 | * | |
44f6c012 RM |
547 | * PARAMETERS: Object - Object whose reference count is to be |
548 | * incremented | |
1da177e4 LT |
549 | * |
550 | * RETURN: None | |
551 | * | |
552 | * DESCRIPTION: Add one reference to an ACPI object | |
553 | * | |
554 | ******************************************************************************/ | |
555 | ||
4be44fcd | 556 | void acpi_ut_add_reference(union acpi_operand_object *object) |
1da177e4 LT |
557 | { |
558 | ||
4be44fcd | 559 | ACPI_FUNCTION_TRACE_PTR("ut_add_reference", object); |
1da177e4 LT |
560 | |
561 | /* Ensure that we have a valid object */ | |
562 | ||
4be44fcd | 563 | if (!acpi_ut_valid_internal_object(object)) { |
1da177e4 LT |
564 | return_VOID; |
565 | } | |
566 | ||
4be44fcd LB |
567 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
568 | "Obj %p Current Refs=%X [To Be Incremented]\n", | |
569 | object, object->common.reference_count)); | |
1da177e4 LT |
570 | |
571 | /* Increment the reference count */ | |
572 | ||
4be44fcd | 573 | (void)acpi_ut_update_object_reference(object, REF_INCREMENT); |
1da177e4 LT |
574 | return_VOID; |
575 | } | |
576 | ||
1da177e4 LT |
577 | /******************************************************************************* |
578 | * | |
579 | * FUNCTION: acpi_ut_remove_reference | |
580 | * | |
44f6c012 | 581 | * PARAMETERS: Object - Object whose ref count will be decremented |
1da177e4 LT |
582 | * |
583 | * RETURN: None | |
584 | * | |
585 | * DESCRIPTION: Decrement the reference count of an ACPI internal object | |
586 | * | |
587 | ******************************************************************************/ | |
588 | ||
4be44fcd | 589 | void acpi_ut_remove_reference(union acpi_operand_object *object) |
1da177e4 LT |
590 | { |
591 | ||
4be44fcd | 592 | ACPI_FUNCTION_TRACE_PTR("ut_remove_reference", object); |
1da177e4 LT |
593 | |
594 | /* | |
595 | * Allow a NULL pointer to be passed in, just ignore it. This saves | |
596 | * each caller from having to check. Also, ignore NS nodes. | |
597 | * | |
598 | */ | |
599 | if (!object || | |
4be44fcd | 600 | (ACPI_GET_DESCRIPTOR_TYPE(object) == ACPI_DESC_TYPE_NAMED)) { |
1da177e4 LT |
601 | return_VOID; |
602 | } | |
603 | ||
604 | /* Ensure that we have a valid object */ | |
605 | ||
4be44fcd | 606 | if (!acpi_ut_valid_internal_object(object)) { |
1da177e4 LT |
607 | return_VOID; |
608 | } | |
609 | ||
4be44fcd LB |
610 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
611 | "Obj %p Current Refs=%X [To Be Decremented]\n", | |
612 | object, object->common.reference_count)); | |
1da177e4 LT |
613 | |
614 | /* | |
615 | * Decrement the reference count, and only actually delete the object | |
616 | * if the reference count becomes 0. (Must also decrement the ref count | |
617 | * of all subobjects!) | |
618 | */ | |
4be44fcd | 619 | (void)acpi_ut_update_object_reference(object, REF_DECREMENT); |
1da177e4 LT |
620 | return_VOID; |
621 | } |