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