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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)) { | |
52fc0b02 | 99 | |
1da177e4 LT |
100 | /* But only if it is NOT a pointer into an ACPI table */ |
101 | ||
102 | obj_pointer = object->string.pointer; | |
103 | } | |
104 | break; | |
105 | ||
1da177e4 LT |
106 | case ACPI_TYPE_BUFFER: |
107 | ||
4be44fcd LB |
108 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
109 | "**** Buffer %p, ptr %p\n", object, | |
110 | object->buffer.pointer)); | |
1da177e4 LT |
111 | |
112 | /* Free the actual buffer */ | |
113 | ||
114 | if (!(object->common.flags & AOPOBJ_STATIC_POINTER)) { | |
52fc0b02 | 115 | |
1da177e4 LT |
116 | /* But only if it is NOT a pointer into an ACPI table */ |
117 | ||
118 | obj_pointer = object->buffer.pointer; | |
119 | } | |
120 | break; | |
121 | ||
1da177e4 LT |
122 | case ACPI_TYPE_PACKAGE: |
123 | ||
4be44fcd LB |
124 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
125 | " **** Package of count %X\n", | |
126 | object->package.count)); | |
1da177e4 LT |
127 | |
128 | /* | |
129 | * Elements of the package are not handled here, they are deleted | |
130 | * separately | |
131 | */ | |
132 | ||
133 | /* Free the (variable length) element pointer array */ | |
134 | ||
135 | obj_pointer = object->package.elements; | |
136 | break; | |
137 | ||
1da177e4 LT |
138 | case ACPI_TYPE_DEVICE: |
139 | ||
140 | if (object->device.gpe_block) { | |
4be44fcd LB |
141 | (void)acpi_ev_delete_gpe_block(object->device. |
142 | gpe_block); | |
1da177e4 LT |
143 | } |
144 | ||
145 | /* Walk the handler list for this device */ | |
146 | ||
147 | handler_desc = object->device.handler; | |
148 | while (handler_desc) { | |
149 | next_desc = handler_desc->address_space.next; | |
4be44fcd | 150 | acpi_ut_remove_reference(handler_desc); |
1da177e4 LT |
151 | handler_desc = next_desc; |
152 | } | |
153 | break; | |
154 | ||
1da177e4 LT |
155 | case ACPI_TYPE_MUTEX: |
156 | ||
4be44fcd LB |
157 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
158 | "***** Mutex %p, Semaphore %p\n", | |
159 | object, object->mutex.semaphore)); | |
1da177e4 | 160 | |
4be44fcd LB |
161 | acpi_ex_unlink_mutex(object); |
162 | (void)acpi_os_delete_semaphore(object->mutex.semaphore); | |
1da177e4 LT |
163 | break; |
164 | ||
1da177e4 LT |
165 | case ACPI_TYPE_EVENT: |
166 | ||
4be44fcd LB |
167 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
168 | "***** Event %p, Semaphore %p\n", | |
169 | object, object->event.semaphore)); | |
1da177e4 | 170 | |
4be44fcd | 171 | (void)acpi_os_delete_semaphore(object->event.semaphore); |
1da177e4 LT |
172 | object->event.semaphore = NULL; |
173 | break; | |
174 | ||
1da177e4 LT |
175 | case ACPI_TYPE_METHOD: |
176 | ||
4be44fcd LB |
177 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
178 | "***** Method %p\n", object)); | |
1da177e4 LT |
179 | |
180 | /* Delete the method semaphore if it exists */ | |
181 | ||
182 | if (object->method.semaphore) { | |
4be44fcd LB |
183 | (void)acpi_os_delete_semaphore(object->method. |
184 | semaphore); | |
1da177e4 LT |
185 | object->method.semaphore = NULL; |
186 | } | |
187 | break; | |
188 | ||
1da177e4 LT |
189 | case ACPI_TYPE_REGION: |
190 | ||
4be44fcd LB |
191 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
192 | "***** Region %p\n", object)); | |
1da177e4 | 193 | |
4be44fcd | 194 | second_desc = acpi_ns_get_secondary_object(object); |
1da177e4 LT |
195 | if (second_desc) { |
196 | /* | |
197 | * Free the region_context if and only if the handler is one of the | |
198 | * default handlers -- and therefore, we created the context object | |
199 | * locally, it was not created by an external caller. | |
200 | */ | |
201 | handler_desc = object->region.handler; | |
202 | if (handler_desc) { | |
4be44fcd LB |
203 | if (handler_desc->address_space. |
204 | hflags & | |
205 | ACPI_ADDR_HANDLER_DEFAULT_INSTALLED) { | |
206 | obj_pointer = | |
207 | second_desc->extra.region_context; | |
1da177e4 LT |
208 | } |
209 | ||
4be44fcd | 210 | acpi_ut_remove_reference(handler_desc); |
1da177e4 LT |
211 | } |
212 | ||
213 | /* Now we can free the Extra object */ | |
214 | ||
4be44fcd | 215 | acpi_ut_delete_object_desc(second_desc); |
1da177e4 LT |
216 | } |
217 | break; | |
218 | ||
1da177e4 LT |
219 | case ACPI_TYPE_BUFFER_FIELD: |
220 | ||
4be44fcd LB |
221 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
222 | "***** Buffer Field %p\n", object)); | |
1da177e4 | 223 | |
4be44fcd | 224 | second_desc = acpi_ns_get_secondary_object(object); |
1da177e4 | 225 | if (second_desc) { |
4be44fcd | 226 | acpi_ut_delete_object_desc(second_desc); |
1da177e4 LT |
227 | } |
228 | break; | |
229 | ||
1da177e4 LT |
230 | default: |
231 | break; | |
232 | } | |
233 | ||
234 | /* Free any allocated memory (pointer within the object) found above */ | |
235 | ||
236 | if (obj_pointer) { | |
4be44fcd LB |
237 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
238 | "Deleting Object Subptr %p\n", obj_pointer)); | |
8313524a | 239 | ACPI_FREE(obj_pointer); |
1da177e4 LT |
240 | } |
241 | ||
242 | /* Now the object can be safely deleted */ | |
243 | ||
4be44fcd LB |
244 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, "Deleting Object %p [%s]\n", |
245 | object, acpi_ut_get_object_type_name(object))); | |
1da177e4 | 246 | |
4be44fcd | 247 | acpi_ut_delete_object_desc(object); |
1da177e4 LT |
248 | return_VOID; |
249 | } | |
250 | ||
1da177e4 LT |
251 | /******************************************************************************* |
252 | * | |
253 | * FUNCTION: acpi_ut_delete_internal_object_list | |
254 | * | |
44f6c012 | 255 | * PARAMETERS: obj_list - Pointer to the list to be deleted |
1da177e4 LT |
256 | * |
257 | * RETURN: None | |
258 | * | |
259 | * DESCRIPTION: This function deletes an internal object list, including both | |
260 | * simple objects and package objects | |
261 | * | |
262 | ******************************************************************************/ | |
263 | ||
4be44fcd | 264 | void acpi_ut_delete_internal_object_list(union acpi_operand_object **obj_list) |
1da177e4 | 265 | { |
4be44fcd | 266 | union acpi_operand_object **internal_obj; |
1da177e4 | 267 | |
4be44fcd | 268 | ACPI_FUNCTION_TRACE("ut_delete_internal_object_list"); |
1da177e4 LT |
269 | |
270 | /* Walk the null-terminated internal list */ | |
271 | ||
272 | for (internal_obj = obj_list; *internal_obj; internal_obj++) { | |
4be44fcd | 273 | acpi_ut_remove_reference(*internal_obj); |
1da177e4 LT |
274 | } |
275 | ||
276 | /* Free the combined parameter pointer list and object array */ | |
277 | ||
8313524a | 278 | ACPI_FREE(obj_list); |
1da177e4 LT |
279 | return_VOID; |
280 | } | |
281 | ||
1da177e4 LT |
282 | /******************************************************************************* |
283 | * | |
284 | * FUNCTION: acpi_ut_update_ref_count | |
285 | * | |
44f6c012 | 286 | * PARAMETERS: Object - Object whose ref count is to be updated |
1da177e4 LT |
287 | * Action - What to do |
288 | * | |
289 | * RETURN: New ref count | |
290 | * | |
291 | * DESCRIPTION: Modify the ref count and return it. | |
292 | * | |
293 | ******************************************************************************/ | |
294 | ||
295 | static void | |
4be44fcd | 296 | acpi_ut_update_ref_count(union acpi_operand_object *object, u32 action) |
1da177e4 | 297 | { |
4be44fcd LB |
298 | u16 count; |
299 | u16 new_count; | |
1da177e4 | 300 | |
4be44fcd | 301 | ACPI_FUNCTION_NAME("ut_update_ref_count"); |
1da177e4 LT |
302 | |
303 | if (!object) { | |
304 | return; | |
305 | } | |
306 | ||
307 | count = object->common.reference_count; | |
308 | new_count = count; | |
309 | ||
310 | /* | |
44f6c012 RM |
311 | * Perform the reference count action |
312 | * (increment, decrement, or force delete) | |
1da177e4 LT |
313 | */ |
314 | switch (action) { | |
315 | ||
316 | case REF_INCREMENT: | |
317 | ||
318 | new_count++; | |
319 | object->common.reference_count = new_count; | |
320 | ||
4be44fcd LB |
321 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
322 | "Obj %p Refs=%X, [Incremented]\n", | |
323 | object, new_count)); | |
1da177e4 LT |
324 | break; |
325 | ||
1da177e4 LT |
326 | case REF_DECREMENT: |
327 | ||
328 | if (count < 1) { | |
4be44fcd LB |
329 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
330 | "Obj %p Refs=%X, can't decrement! (Set to 0)\n", | |
331 | object, new_count)); | |
1da177e4 LT |
332 | |
333 | new_count = 0; | |
4be44fcd | 334 | } else { |
1da177e4 LT |
335 | new_count--; |
336 | ||
4be44fcd LB |
337 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
338 | "Obj %p Refs=%X, [Decremented]\n", | |
339 | object, new_count)); | |
1da177e4 LT |
340 | } |
341 | ||
4be44fcd LB |
342 | if (ACPI_GET_OBJECT_TYPE(object) == ACPI_TYPE_METHOD) { |
343 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, | |
344 | "Method Obj %p Refs=%X, [Decremented]\n", | |
345 | object, new_count)); | |
1da177e4 LT |
346 | } |
347 | ||
348 | object->common.reference_count = new_count; | |
349 | if (new_count == 0) { | |
4be44fcd | 350 | acpi_ut_delete_internal_obj(object); |
1da177e4 LT |
351 | } |
352 | ||
353 | break; | |
354 | ||
1da177e4 LT |
355 | case REF_FORCE_DELETE: |
356 | ||
4be44fcd LB |
357 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
358 | "Obj %p Refs=%X, Force delete! (Set to 0)\n", | |
359 | object, count)); | |
1da177e4 LT |
360 | |
361 | new_count = 0; | |
362 | object->common.reference_count = new_count; | |
4be44fcd | 363 | acpi_ut_delete_internal_obj(object); |
1da177e4 LT |
364 | break; |
365 | ||
1da177e4 LT |
366 | default: |
367 | ||
b8e4d893 | 368 | ACPI_ERROR((AE_INFO, "Unknown action (%X)", action)); |
1da177e4 LT |
369 | break; |
370 | } | |
371 | ||
372 | /* | |
373 | * Sanity check the reference count, for debug purposes only. | |
374 | * (A deleted object will have a huge reference count) | |
375 | */ | |
376 | if (count > ACPI_MAX_REFERENCE_COUNT) { | |
377 | ||
b8e4d893 BM |
378 | ACPI_WARNING((AE_INFO, |
379 | "Large Reference Count (%X) in object %p", | |
380 | count, object)); | |
1da177e4 LT |
381 | } |
382 | ||
383 | return; | |
384 | } | |
385 | ||
1da177e4 LT |
386 | /******************************************************************************* |
387 | * | |
388 | * FUNCTION: acpi_ut_update_object_reference | |
389 | * | |
44f6c012 | 390 | * PARAMETERS: Object - Increment ref count for this object |
1da177e4 LT |
391 | * and all sub-objects |
392 | * Action - Either REF_INCREMENT or REF_DECREMENT or | |
393 | * REF_FORCE_DELETE | |
394 | * | |
395 | * RETURN: Status | |
396 | * | |
397 | * DESCRIPTION: Increment the object reference count | |
398 | * | |
399 | * Object references are incremented when: | |
400 | * 1) An object is attached to a Node (namespace object) | |
401 | * 2) An object is copied (all subobjects must be incremented) | |
402 | * | |
403 | * Object references are decremented when: | |
404 | * 1) An object is detached from an Node | |
405 | * | |
406 | ******************************************************************************/ | |
407 | ||
408 | acpi_status | |
4be44fcd | 409 | acpi_ut_update_object_reference(union acpi_operand_object * object, u16 action) |
1da177e4 | 410 | { |
4be44fcd LB |
411 | acpi_status status = AE_OK; |
412 | union acpi_generic_state *state_list = NULL; | |
413 | union acpi_operand_object *next_object = NULL; | |
414 | union acpi_generic_state *state; | |
415 | acpi_native_uint i; | |
1da177e4 | 416 | |
4be44fcd | 417 | ACPI_FUNCTION_TRACE_PTR("ut_update_object_reference", object); |
1da177e4 | 418 | |
f9f4601f | 419 | while (object) { |
52fc0b02 | 420 | |
f9f4601f | 421 | /* Make sure that this isn't a namespace handle */ |
1da177e4 | 422 | |
4be44fcd LB |
423 | if (ACPI_GET_DESCRIPTOR_TYPE(object) == ACPI_DESC_TYPE_NAMED) { |
424 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, | |
425 | "Object %p is NS handle\n", object)); | |
426 | return_ACPI_STATUS(AE_OK); | |
f9f4601f | 427 | } |
1da177e4 LT |
428 | |
429 | /* | |
430 | * All sub-objects must have their reference count incremented also. | |
431 | * Different object types have different subobjects. | |
432 | */ | |
4be44fcd | 433 | switch (ACPI_GET_OBJECT_TYPE(object)) { |
1da177e4 LT |
434 | case ACPI_TYPE_DEVICE: |
435 | ||
4be44fcd LB |
436 | acpi_ut_update_ref_count(object->device.system_notify, |
437 | action); | |
438 | acpi_ut_update_ref_count(object->device.device_notify, | |
439 | action); | |
1da177e4 LT |
440 | break; |
441 | ||
1da177e4 | 442 | case ACPI_TYPE_PACKAGE: |
1da177e4 | 443 | /* |
f9f4601f RM |
444 | * We must update all the sub-objects of the package, |
445 | * each of whom may have their own sub-objects. | |
1da177e4 LT |
446 | */ |
447 | for (i = 0; i < object->package.count; i++) { | |
448 | /* | |
449 | * Push each element onto the stack for later processing. | |
450 | * Note: There can be null elements within the package, | |
451 | * these are simply ignored | |
452 | */ | |
4be44fcd LB |
453 | status = |
454 | acpi_ut_create_update_state_and_push | |
455 | (object->package.elements[i], action, | |
456 | &state_list); | |
457 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
458 | goto error_exit; |
459 | } | |
1da177e4 LT |
460 | } |
461 | break; | |
462 | ||
1da177e4 LT |
463 | case ACPI_TYPE_BUFFER_FIELD: |
464 | ||
f9f4601f | 465 | next_object = object->buffer_field.buffer_obj; |
1da177e4 LT |
466 | break; |
467 | ||
1da177e4 LT |
468 | case ACPI_TYPE_LOCAL_REGION_FIELD: |
469 | ||
f9f4601f RM |
470 | next_object = object->field.region_obj; |
471 | break; | |
1da177e4 LT |
472 | |
473 | case ACPI_TYPE_LOCAL_BANK_FIELD: | |
474 | ||
f9f4601f | 475 | next_object = object->bank_field.bank_obj; |
4be44fcd LB |
476 | status = |
477 | acpi_ut_create_update_state_and_push(object-> | |
478 | bank_field. | |
479 | region_obj, | |
480 | action, | |
481 | &state_list); | |
482 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
483 | goto error_exit; |
484 | } | |
1da177e4 LT |
485 | break; |
486 | ||
1da177e4 LT |
487 | case ACPI_TYPE_LOCAL_INDEX_FIELD: |
488 | ||
f9f4601f | 489 | next_object = object->index_field.index_obj; |
4be44fcd LB |
490 | status = |
491 | acpi_ut_create_update_state_and_push(object-> | |
492 | index_field. | |
493 | data_obj, | |
494 | action, | |
495 | &state_list); | |
496 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
497 | goto error_exit; |
498 | } | |
1da177e4 LT |
499 | break; |
500 | ||
1da177e4 | 501 | case ACPI_TYPE_LOCAL_REFERENCE: |
1da177e4 LT |
502 | /* |
503 | * The target of an Index (a package, string, or buffer) must track | |
504 | * changes to the ref count of the index. | |
505 | */ | |
506 | if (object->reference.opcode == AML_INDEX_OP) { | |
f9f4601f | 507 | next_object = object->reference.object; |
1da177e4 LT |
508 | } |
509 | break; | |
510 | ||
1da177e4 LT |
511 | case ACPI_TYPE_REGION: |
512 | default: | |
4be44fcd | 513 | break; /* No subobjects */ |
1da177e4 LT |
514 | } |
515 | ||
516 | /* | |
517 | * Now we can update the count in the main object. This can only | |
518 | * happen after we update the sub-objects in case this causes the | |
519 | * main object to be deleted. | |
520 | */ | |
4be44fcd | 521 | acpi_ut_update_ref_count(object, action); |
f9f4601f | 522 | object = NULL; |
1da177e4 LT |
523 | |
524 | /* Move on to the next object to be updated */ | |
525 | ||
f9f4601f RM |
526 | if (next_object) { |
527 | object = next_object; | |
528 | next_object = NULL; | |
4be44fcd LB |
529 | } else if (state_list) { |
530 | state = acpi_ut_pop_generic_state(&state_list); | |
f9f4601f | 531 | object = state->update.object; |
4be44fcd | 532 | acpi_ut_delete_generic_state(state); |
f9f4601f | 533 | } |
1da177e4 LT |
534 | } |
535 | ||
4be44fcd | 536 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 537 | |
4be44fcd | 538 | error_exit: |
1da177e4 | 539 | |
b8e4d893 BM |
540 | ACPI_EXCEPTION((AE_INFO, status, |
541 | "Could not update object reference count")); | |
1da177e4 | 542 | |
4be44fcd | 543 | return_ACPI_STATUS(status); |
1da177e4 LT |
544 | } |
545 | ||
1da177e4 LT |
546 | /******************************************************************************* |
547 | * | |
548 | * FUNCTION: acpi_ut_add_reference | |
549 | * | |
44f6c012 RM |
550 | * PARAMETERS: Object - Object whose reference count is to be |
551 | * incremented | |
1da177e4 LT |
552 | * |
553 | * RETURN: None | |
554 | * | |
555 | * DESCRIPTION: Add one reference to an ACPI object | |
556 | * | |
557 | ******************************************************************************/ | |
558 | ||
4be44fcd | 559 | void acpi_ut_add_reference(union acpi_operand_object *object) |
1da177e4 LT |
560 | { |
561 | ||
4be44fcd | 562 | ACPI_FUNCTION_TRACE_PTR("ut_add_reference", object); |
1da177e4 LT |
563 | |
564 | /* Ensure that we have a valid object */ | |
565 | ||
4be44fcd | 566 | if (!acpi_ut_valid_internal_object(object)) { |
1da177e4 LT |
567 | return_VOID; |
568 | } | |
569 | ||
4be44fcd LB |
570 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
571 | "Obj %p Current Refs=%X [To Be Incremented]\n", | |
572 | object, object->common.reference_count)); | |
1da177e4 LT |
573 | |
574 | /* Increment the reference count */ | |
575 | ||
4be44fcd | 576 | (void)acpi_ut_update_object_reference(object, REF_INCREMENT); |
1da177e4 LT |
577 | return_VOID; |
578 | } | |
579 | ||
1da177e4 LT |
580 | /******************************************************************************* |
581 | * | |
582 | * FUNCTION: acpi_ut_remove_reference | |
583 | * | |
44f6c012 | 584 | * PARAMETERS: Object - Object whose ref count will be decremented |
1da177e4 LT |
585 | * |
586 | * RETURN: None | |
587 | * | |
588 | * DESCRIPTION: Decrement the reference count of an ACPI internal object | |
589 | * | |
590 | ******************************************************************************/ | |
591 | ||
4be44fcd | 592 | void acpi_ut_remove_reference(union acpi_operand_object *object) |
1da177e4 LT |
593 | { |
594 | ||
4be44fcd | 595 | ACPI_FUNCTION_TRACE_PTR("ut_remove_reference", object); |
1da177e4 LT |
596 | |
597 | /* | |
598 | * Allow a NULL pointer to be passed in, just ignore it. This saves | |
599 | * each caller from having to check. Also, ignore NS nodes. | |
600 | * | |
601 | */ | |
602 | if (!object || | |
4be44fcd | 603 | (ACPI_GET_DESCRIPTOR_TYPE(object) == ACPI_DESC_TYPE_NAMED)) { |
1da177e4 LT |
604 | return_VOID; |
605 | } | |
606 | ||
607 | /* Ensure that we have a valid object */ | |
608 | ||
4be44fcd | 609 | if (!acpi_ut_valid_internal_object(object)) { |
1da177e4 LT |
610 | return_VOID; |
611 | } | |
612 | ||
4be44fcd LB |
613 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
614 | "Obj %p Current Refs=%X [To Be Decremented]\n", | |
615 | object, object->common.reference_count)); | |
1da177e4 LT |
616 | |
617 | /* | |
618 | * Decrement the reference count, and only actually delete the object | |
619 | * if the reference count becomes 0. (Must also decrement the ref count | |
620 | * of all subobjects!) | |
621 | */ | |
4be44fcd | 622 | (void)acpi_ut_update_object_reference(object, REF_DECREMENT); |
1da177e4 LT |
623 | return_VOID; |
624 | } |