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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 | |
b229cf92 | 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) { | |
61686124 | 203 | if (handler_desc->address_space.handler_flags & |
4be44fcd | 204 | ACPI_ADDR_HANDLER_DEFAULT_INSTALLED) { |
793c2388 BM |
205 | |
206 | /* Deactivate region and free region context */ | |
207 | ||
208 | if (handler_desc->address_space.setup) { | |
209 | (void)handler_desc-> | |
210 | address_space.setup(object, | |
211 | ACPI_REGION_DEACTIVATE, | |
212 | handler_desc-> | |
213 | address_space. | |
214 | context, | |
215 | &second_desc-> | |
216 | extra. | |
217 | region_context); | |
218 | } | |
1da177e4 LT |
219 | } |
220 | ||
4be44fcd | 221 | acpi_ut_remove_reference(handler_desc); |
1da177e4 LT |
222 | } |
223 | ||
224 | /* Now we can free the Extra object */ | |
225 | ||
4be44fcd | 226 | acpi_ut_delete_object_desc(second_desc); |
1da177e4 LT |
227 | } |
228 | break; | |
229 | ||
1da177e4 LT |
230 | case ACPI_TYPE_BUFFER_FIELD: |
231 | ||
4be44fcd LB |
232 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
233 | "***** Buffer Field %p\n", object)); | |
1da177e4 | 234 | |
4be44fcd | 235 | second_desc = acpi_ns_get_secondary_object(object); |
1da177e4 | 236 | if (second_desc) { |
4be44fcd | 237 | acpi_ut_delete_object_desc(second_desc); |
1da177e4 LT |
238 | } |
239 | break; | |
240 | ||
1da177e4 LT |
241 | default: |
242 | break; | |
243 | } | |
244 | ||
245 | /* Free any allocated memory (pointer within the object) found above */ | |
246 | ||
247 | if (obj_pointer) { | |
4be44fcd LB |
248 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
249 | "Deleting Object Subptr %p\n", obj_pointer)); | |
8313524a | 250 | ACPI_FREE(obj_pointer); |
1da177e4 LT |
251 | } |
252 | ||
253 | /* Now the object can be safely deleted */ | |
254 | ||
4be44fcd LB |
255 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, "Deleting Object %p [%s]\n", |
256 | object, acpi_ut_get_object_type_name(object))); | |
1da177e4 | 257 | |
4be44fcd | 258 | acpi_ut_delete_object_desc(object); |
1da177e4 LT |
259 | return_VOID; |
260 | } | |
261 | ||
1da177e4 LT |
262 | /******************************************************************************* |
263 | * | |
264 | * FUNCTION: acpi_ut_delete_internal_object_list | |
265 | * | |
44f6c012 | 266 | * PARAMETERS: obj_list - Pointer to the list to be deleted |
1da177e4 LT |
267 | * |
268 | * RETURN: None | |
269 | * | |
270 | * DESCRIPTION: This function deletes an internal object list, including both | |
271 | * simple objects and package objects | |
272 | * | |
273 | ******************************************************************************/ | |
274 | ||
4be44fcd | 275 | void acpi_ut_delete_internal_object_list(union acpi_operand_object **obj_list) |
1da177e4 | 276 | { |
4be44fcd | 277 | union acpi_operand_object **internal_obj; |
1da177e4 | 278 | |
b229cf92 | 279 | ACPI_FUNCTION_TRACE(ut_delete_internal_object_list); |
1da177e4 LT |
280 | |
281 | /* Walk the null-terminated internal list */ | |
282 | ||
283 | for (internal_obj = obj_list; *internal_obj; internal_obj++) { | |
4be44fcd | 284 | acpi_ut_remove_reference(*internal_obj); |
1da177e4 LT |
285 | } |
286 | ||
287 | /* Free the combined parameter pointer list and object array */ | |
288 | ||
8313524a | 289 | ACPI_FREE(obj_list); |
1da177e4 LT |
290 | return_VOID; |
291 | } | |
292 | ||
1da177e4 LT |
293 | /******************************************************************************* |
294 | * | |
295 | * FUNCTION: acpi_ut_update_ref_count | |
296 | * | |
44f6c012 | 297 | * PARAMETERS: Object - Object whose ref count is to be updated |
1da177e4 LT |
298 | * Action - What to do |
299 | * | |
300 | * RETURN: New ref count | |
301 | * | |
302 | * DESCRIPTION: Modify the ref count and return it. | |
303 | * | |
304 | ******************************************************************************/ | |
305 | ||
306 | static void | |
4be44fcd | 307 | acpi_ut_update_ref_count(union acpi_operand_object *object, u32 action) |
1da177e4 | 308 | { |
4be44fcd LB |
309 | u16 count; |
310 | u16 new_count; | |
1da177e4 | 311 | |
b229cf92 | 312 | ACPI_FUNCTION_NAME(ut_update_ref_count); |
1da177e4 LT |
313 | |
314 | if (!object) { | |
315 | return; | |
316 | } | |
317 | ||
318 | count = object->common.reference_count; | |
319 | new_count = count; | |
320 | ||
321 | /* | |
44f6c012 RM |
322 | * Perform the reference count action |
323 | * (increment, decrement, or force delete) | |
1da177e4 LT |
324 | */ |
325 | switch (action) { | |
326 | ||
327 | case REF_INCREMENT: | |
328 | ||
329 | new_count++; | |
330 | object->common.reference_count = new_count; | |
331 | ||
4be44fcd LB |
332 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
333 | "Obj %p Refs=%X, [Incremented]\n", | |
334 | object, new_count)); | |
1da177e4 LT |
335 | break; |
336 | ||
1da177e4 LT |
337 | case REF_DECREMENT: |
338 | ||
339 | if (count < 1) { | |
4be44fcd LB |
340 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
341 | "Obj %p Refs=%X, can't decrement! (Set to 0)\n", | |
342 | object, new_count)); | |
1da177e4 LT |
343 | |
344 | new_count = 0; | |
4be44fcd | 345 | } else { |
1da177e4 LT |
346 | new_count--; |
347 | ||
4be44fcd LB |
348 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
349 | "Obj %p Refs=%X, [Decremented]\n", | |
350 | object, new_count)); | |
1da177e4 LT |
351 | } |
352 | ||
4be44fcd LB |
353 | if (ACPI_GET_OBJECT_TYPE(object) == ACPI_TYPE_METHOD) { |
354 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, | |
355 | "Method Obj %p Refs=%X, [Decremented]\n", | |
356 | object, new_count)); | |
1da177e4 LT |
357 | } |
358 | ||
359 | object->common.reference_count = new_count; | |
360 | if (new_count == 0) { | |
4be44fcd | 361 | acpi_ut_delete_internal_obj(object); |
1da177e4 LT |
362 | } |
363 | ||
364 | break; | |
365 | ||
1da177e4 LT |
366 | case REF_FORCE_DELETE: |
367 | ||
4be44fcd LB |
368 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
369 | "Obj %p Refs=%X, Force delete! (Set to 0)\n", | |
370 | object, count)); | |
1da177e4 LT |
371 | |
372 | new_count = 0; | |
373 | object->common.reference_count = new_count; | |
4be44fcd | 374 | acpi_ut_delete_internal_obj(object); |
1da177e4 LT |
375 | break; |
376 | ||
1da177e4 LT |
377 | default: |
378 | ||
b8e4d893 | 379 | ACPI_ERROR((AE_INFO, "Unknown action (%X)", action)); |
1da177e4 LT |
380 | break; |
381 | } | |
382 | ||
383 | /* | |
384 | * Sanity check the reference count, for debug purposes only. | |
385 | * (A deleted object will have a huge reference count) | |
386 | */ | |
387 | if (count > ACPI_MAX_REFERENCE_COUNT) { | |
388 | ||
b8e4d893 BM |
389 | ACPI_WARNING((AE_INFO, |
390 | "Large Reference Count (%X) in object %p", | |
391 | count, object)); | |
1da177e4 LT |
392 | } |
393 | ||
394 | return; | |
395 | } | |
396 | ||
1da177e4 LT |
397 | /******************************************************************************* |
398 | * | |
399 | * FUNCTION: acpi_ut_update_object_reference | |
400 | * | |
44f6c012 | 401 | * PARAMETERS: Object - Increment ref count for this object |
1da177e4 LT |
402 | * and all sub-objects |
403 | * Action - Either REF_INCREMENT or REF_DECREMENT or | |
404 | * REF_FORCE_DELETE | |
405 | * | |
406 | * RETURN: Status | |
407 | * | |
408 | * DESCRIPTION: Increment the object reference count | |
409 | * | |
410 | * Object references are incremented when: | |
411 | * 1) An object is attached to a Node (namespace object) | |
412 | * 2) An object is copied (all subobjects must be incremented) | |
413 | * | |
414 | * Object references are decremented when: | |
415 | * 1) An object is detached from an Node | |
416 | * | |
417 | ******************************************************************************/ | |
418 | ||
419 | acpi_status | |
4be44fcd | 420 | acpi_ut_update_object_reference(union acpi_operand_object * object, u16 action) |
1da177e4 | 421 | { |
4be44fcd LB |
422 | acpi_status status = AE_OK; |
423 | union acpi_generic_state *state_list = NULL; | |
424 | union acpi_operand_object *next_object = NULL; | |
425 | union acpi_generic_state *state; | |
426 | acpi_native_uint i; | |
1da177e4 | 427 | |
b229cf92 | 428 | ACPI_FUNCTION_TRACE_PTR(ut_update_object_reference, object); |
1da177e4 | 429 | |
f9f4601f | 430 | while (object) { |
52fc0b02 | 431 | |
f9f4601f | 432 | /* Make sure that this isn't a namespace handle */ |
1da177e4 | 433 | |
4be44fcd LB |
434 | if (ACPI_GET_DESCRIPTOR_TYPE(object) == ACPI_DESC_TYPE_NAMED) { |
435 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, | |
436 | "Object %p is NS handle\n", object)); | |
437 | return_ACPI_STATUS(AE_OK); | |
f9f4601f | 438 | } |
1da177e4 LT |
439 | |
440 | /* | |
441 | * All sub-objects must have their reference count incremented also. | |
442 | * Different object types have different subobjects. | |
443 | */ | |
4be44fcd | 444 | switch (ACPI_GET_OBJECT_TYPE(object)) { |
1da177e4 LT |
445 | case ACPI_TYPE_DEVICE: |
446 | ||
4be44fcd LB |
447 | acpi_ut_update_ref_count(object->device.system_notify, |
448 | action); | |
449 | acpi_ut_update_ref_count(object->device.device_notify, | |
450 | action); | |
1da177e4 LT |
451 | break; |
452 | ||
1da177e4 | 453 | case ACPI_TYPE_PACKAGE: |
1da177e4 | 454 | /* |
f9f4601f RM |
455 | * We must update all the sub-objects of the package, |
456 | * each of whom may have their own sub-objects. | |
1da177e4 LT |
457 | */ |
458 | for (i = 0; i < object->package.count; i++) { | |
459 | /* | |
460 | * Push each element onto the stack for later processing. | |
461 | * Note: There can be null elements within the package, | |
462 | * these are simply ignored | |
463 | */ | |
4be44fcd LB |
464 | status = |
465 | acpi_ut_create_update_state_and_push | |
466 | (object->package.elements[i], action, | |
467 | &state_list); | |
468 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
469 | goto error_exit; |
470 | } | |
1da177e4 LT |
471 | } |
472 | break; | |
473 | ||
1da177e4 LT |
474 | case ACPI_TYPE_BUFFER_FIELD: |
475 | ||
f9f4601f | 476 | next_object = object->buffer_field.buffer_obj; |
1da177e4 LT |
477 | break; |
478 | ||
1da177e4 LT |
479 | case ACPI_TYPE_LOCAL_REGION_FIELD: |
480 | ||
f9f4601f RM |
481 | next_object = object->field.region_obj; |
482 | break; | |
1da177e4 LT |
483 | |
484 | case ACPI_TYPE_LOCAL_BANK_FIELD: | |
485 | ||
f9f4601f | 486 | next_object = object->bank_field.bank_obj; |
4be44fcd LB |
487 | status = |
488 | acpi_ut_create_update_state_and_push(object-> | |
489 | bank_field. | |
490 | region_obj, | |
491 | action, | |
492 | &state_list); | |
493 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
494 | goto error_exit; |
495 | } | |
1da177e4 LT |
496 | break; |
497 | ||
1da177e4 LT |
498 | case ACPI_TYPE_LOCAL_INDEX_FIELD: |
499 | ||
f9f4601f | 500 | next_object = object->index_field.index_obj; |
4be44fcd LB |
501 | status = |
502 | acpi_ut_create_update_state_and_push(object-> | |
503 | index_field. | |
504 | data_obj, | |
505 | action, | |
506 | &state_list); | |
507 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
508 | goto error_exit; |
509 | } | |
1da177e4 LT |
510 | break; |
511 | ||
1da177e4 | 512 | case ACPI_TYPE_LOCAL_REFERENCE: |
1da177e4 LT |
513 | /* |
514 | * The target of an Index (a package, string, or buffer) must track | |
515 | * changes to the ref count of the index. | |
516 | */ | |
517 | if (object->reference.opcode == AML_INDEX_OP) { | |
f9f4601f | 518 | next_object = object->reference.object; |
1da177e4 LT |
519 | } |
520 | break; | |
521 | ||
1da177e4 LT |
522 | case ACPI_TYPE_REGION: |
523 | default: | |
4be44fcd | 524 | break; /* No subobjects */ |
1da177e4 LT |
525 | } |
526 | ||
527 | /* | |
528 | * Now we can update the count in the main object. This can only | |
529 | * happen after we update the sub-objects in case this causes the | |
530 | * main object to be deleted. | |
531 | */ | |
4be44fcd | 532 | acpi_ut_update_ref_count(object, action); |
f9f4601f | 533 | object = NULL; |
1da177e4 LT |
534 | |
535 | /* Move on to the next object to be updated */ | |
536 | ||
f9f4601f RM |
537 | if (next_object) { |
538 | object = next_object; | |
539 | next_object = NULL; | |
4be44fcd LB |
540 | } else if (state_list) { |
541 | state = acpi_ut_pop_generic_state(&state_list); | |
f9f4601f | 542 | object = state->update.object; |
4be44fcd | 543 | acpi_ut_delete_generic_state(state); |
f9f4601f | 544 | } |
1da177e4 LT |
545 | } |
546 | ||
4be44fcd | 547 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 548 | |
4be44fcd | 549 | error_exit: |
1da177e4 | 550 | |
b8e4d893 BM |
551 | ACPI_EXCEPTION((AE_INFO, status, |
552 | "Could not update object reference count")); | |
1da177e4 | 553 | |
4be44fcd | 554 | return_ACPI_STATUS(status); |
1da177e4 LT |
555 | } |
556 | ||
1da177e4 LT |
557 | /******************************************************************************* |
558 | * | |
559 | * FUNCTION: acpi_ut_add_reference | |
560 | * | |
44f6c012 RM |
561 | * PARAMETERS: Object - Object whose reference count is to be |
562 | * incremented | |
1da177e4 LT |
563 | * |
564 | * RETURN: None | |
565 | * | |
566 | * DESCRIPTION: Add one reference to an ACPI object | |
567 | * | |
568 | ******************************************************************************/ | |
569 | ||
4be44fcd | 570 | void acpi_ut_add_reference(union acpi_operand_object *object) |
1da177e4 LT |
571 | { |
572 | ||
b229cf92 | 573 | ACPI_FUNCTION_TRACE_PTR(ut_add_reference, object); |
1da177e4 LT |
574 | |
575 | /* Ensure that we have a valid object */ | |
576 | ||
4be44fcd | 577 | if (!acpi_ut_valid_internal_object(object)) { |
1da177e4 LT |
578 | return_VOID; |
579 | } | |
580 | ||
4be44fcd LB |
581 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
582 | "Obj %p Current Refs=%X [To Be Incremented]\n", | |
583 | object, object->common.reference_count)); | |
1da177e4 LT |
584 | |
585 | /* Increment the reference count */ | |
586 | ||
4be44fcd | 587 | (void)acpi_ut_update_object_reference(object, REF_INCREMENT); |
1da177e4 LT |
588 | return_VOID; |
589 | } | |
590 | ||
1da177e4 LT |
591 | /******************************************************************************* |
592 | * | |
593 | * FUNCTION: acpi_ut_remove_reference | |
594 | * | |
44f6c012 | 595 | * PARAMETERS: Object - Object whose ref count will be decremented |
1da177e4 LT |
596 | * |
597 | * RETURN: None | |
598 | * | |
599 | * DESCRIPTION: Decrement the reference count of an ACPI internal object | |
600 | * | |
601 | ******************************************************************************/ | |
602 | ||
4be44fcd | 603 | void acpi_ut_remove_reference(union acpi_operand_object *object) |
1da177e4 LT |
604 | { |
605 | ||
b229cf92 | 606 | ACPI_FUNCTION_TRACE_PTR(ut_remove_reference, object); |
1da177e4 LT |
607 | |
608 | /* | |
609 | * Allow a NULL pointer to be passed in, just ignore it. This saves | |
610 | * each caller from having to check. Also, ignore NS nodes. | |
611 | * | |
612 | */ | |
613 | if (!object || | |
4be44fcd | 614 | (ACPI_GET_DESCRIPTOR_TYPE(object) == ACPI_DESC_TYPE_NAMED)) { |
1da177e4 LT |
615 | return_VOID; |
616 | } | |
617 | ||
618 | /* Ensure that we have a valid object */ | |
619 | ||
4be44fcd | 620 | if (!acpi_ut_valid_internal_object(object)) { |
1da177e4 LT |
621 | return_VOID; |
622 | } | |
623 | ||
4be44fcd LB |
624 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
625 | "Obj %p Current Refs=%X [To Be Decremented]\n", | |
626 | object, object->common.reference_count)); | |
1da177e4 LT |
627 | |
628 | /* | |
629 | * Decrement the reference count, and only actually delete the object | |
630 | * if the reference count becomes 0. (Must also decrement the ref count | |
631 | * of all subobjects!) | |
632 | */ | |
4be44fcd | 633 | (void)acpi_ut_update_object_reference(object, REF_DECREMENT); |
1da177e4 LT |
634 | return_VOID; |
635 | } |