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 | /* | |
75a44ce0 | 8 | * Copyright (C) 2000 - 2008, Intel Corp. |
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> | |
1da177e4 LT |
48 | |
49 | #define _COMPONENT ACPI_UTILITIES | |
4be44fcd | 50 | ACPI_MODULE_NAME("utdelete") |
1da177e4 | 51 | |
44f6c012 | 52 | /* Local prototypes */ |
4be44fcd | 53 | static void acpi_ut_delete_internal_obj(union acpi_operand_object *object); |
44f6c012 RM |
54 | |
55 | static void | |
4be44fcd | 56 | acpi_ut_update_ref_count(union acpi_operand_object *object, u32 action); |
1da177e4 LT |
57 | |
58 | /******************************************************************************* | |
59 | * | |
60 | * FUNCTION: acpi_ut_delete_internal_obj | |
61 | * | |
44f6c012 | 62 | * PARAMETERS: Object - Object to be deleted |
1da177e4 LT |
63 | * |
64 | * RETURN: None | |
65 | * | |
66 | * DESCRIPTION: Low level object deletion, after reference counts have been | |
67 | * updated (All reference counts, including sub-objects!) | |
68 | * | |
69 | ******************************************************************************/ | |
70 | ||
4be44fcd | 71 | static void acpi_ut_delete_internal_obj(union acpi_operand_object *object) |
1da177e4 | 72 | { |
4be44fcd LB |
73 | void *obj_pointer = NULL; |
74 | union acpi_operand_object *handler_desc; | |
75 | union acpi_operand_object *second_desc; | |
76 | union acpi_operand_object *next_desc; | |
1da177e4 | 77 | |
b229cf92 | 78 | ACPI_FUNCTION_TRACE_PTR(ut_delete_internal_obj, object); |
1da177e4 LT |
79 | |
80 | if (!object) { | |
81 | return_VOID; | |
82 | } | |
83 | ||
84 | /* | |
85 | * Must delete or free any pointers within the object that are not | |
86 | * actual ACPI objects (for example, a raw buffer pointer). | |
87 | */ | |
4be44fcd | 88 | switch (ACPI_GET_OBJECT_TYPE(object)) { |
1da177e4 LT |
89 | case ACPI_TYPE_STRING: |
90 | ||
4be44fcd LB |
91 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
92 | "**** String %p, ptr %p\n", object, | |
93 | object->string.pointer)); | |
1da177e4 LT |
94 | |
95 | /* Free the actual string buffer */ | |
96 | ||
97 | if (!(object->common.flags & AOPOBJ_STATIC_POINTER)) { | |
52fc0b02 | 98 | |
1da177e4 LT |
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)) { | |
52fc0b02 | 114 | |
1da177e4 LT |
115 | /* But only if it is NOT a pointer into an ACPI table */ |
116 | ||
117 | obj_pointer = object->buffer.pointer; | |
118 | } | |
119 | break; | |
120 | ||
1da177e4 LT |
121 | case ACPI_TYPE_PACKAGE: |
122 | ||
4be44fcd LB |
123 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
124 | " **** Package of count %X\n", | |
125 | object->package.count)); | |
1da177e4 LT |
126 | |
127 | /* | |
128 | * Elements of the package are not handled here, they are deleted | |
129 | * separately | |
130 | */ | |
131 | ||
132 | /* Free the (variable length) element pointer array */ | |
133 | ||
134 | obj_pointer = object->package.elements; | |
135 | break; | |
136 | ||
2843ae77 BM |
137 | /* |
138 | * These objects have a possible list of notify handlers. | |
139 | * Device object also may have a GPE block. | |
140 | */ | |
1da177e4 LT |
141 | case ACPI_TYPE_DEVICE: |
142 | ||
143 | if (object->device.gpe_block) { | |
4be44fcd LB |
144 | (void)acpi_ev_delete_gpe_block(object->device. |
145 | gpe_block); | |
1da177e4 LT |
146 | } |
147 | ||
2843ae77 BM |
148 | /*lint -fallthrough */ |
149 | ||
150 | case ACPI_TYPE_PROCESSOR: | |
151 | case ACPI_TYPE_THERMAL: | |
152 | ||
153 | /* Walk the notify handler list for this object */ | |
1da177e4 | 154 | |
2843ae77 | 155 | handler_desc = object->common_notify.handler; |
1da177e4 LT |
156 | while (handler_desc) { |
157 | next_desc = handler_desc->address_space.next; | |
4be44fcd | 158 | acpi_ut_remove_reference(handler_desc); |
1da177e4 LT |
159 | handler_desc = next_desc; |
160 | } | |
161 | break; | |
162 | ||
1da177e4 LT |
163 | case ACPI_TYPE_MUTEX: |
164 | ||
4be44fcd | 165 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
967440e3 BM |
166 | "***** Mutex %p, OS Mutex %p\n", |
167 | object, object->mutex.os_mutex)); | |
168 | ||
ba886cd4 | 169 | if (object == acpi_gbl_global_lock_mutex) { |
c81da666 BM |
170 | |
171 | /* Global Lock has extra semaphore */ | |
967440e3 BM |
172 | |
173 | (void) | |
174 | acpi_os_delete_semaphore | |
175 | (acpi_gbl_global_lock_semaphore); | |
176 | acpi_gbl_global_lock_semaphore = NULL; | |
c81da666 BM |
177 | |
178 | acpi_os_delete_mutex(object->mutex.os_mutex); | |
179 | acpi_gbl_global_lock_mutex = NULL; | |
180 | } else { | |
262a7a28 | 181 | acpi_ex_unlink_mutex(object); |
c81da666 | 182 | acpi_os_delete_mutex(object->mutex.os_mutex); |
967440e3 | 183 | } |
1da177e4 LT |
184 | break; |
185 | ||
1da177e4 LT |
186 | case ACPI_TYPE_EVENT: |
187 | ||
4be44fcd | 188 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
967440e3 BM |
189 | "***** Event %p, OS Semaphore %p\n", |
190 | object, object->event.os_semaphore)); | |
1da177e4 | 191 | |
967440e3 BM |
192 | (void)acpi_os_delete_semaphore(object->event.os_semaphore); |
193 | object->event.os_semaphore = NULL; | |
1da177e4 LT |
194 | break; |
195 | ||
1da177e4 LT |
196 | case ACPI_TYPE_METHOD: |
197 | ||
4be44fcd LB |
198 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
199 | "***** Method %p\n", object)); | |
1da177e4 | 200 | |
967440e3 | 201 | /* Delete the method mutex if it exists */ |
1da177e4 | 202 | |
967440e3 BM |
203 | if (object->method.mutex) { |
204 | acpi_os_delete_mutex(object->method.mutex->mutex. | |
205 | os_mutex); | |
206 | acpi_ut_delete_object_desc(object->method.mutex); | |
207 | object->method.mutex = NULL; | |
1da177e4 LT |
208 | } |
209 | break; | |
210 | ||
1da177e4 LT |
211 | case ACPI_TYPE_REGION: |
212 | ||
4be44fcd LB |
213 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
214 | "***** Region %p\n", object)); | |
1da177e4 | 215 | |
4be44fcd | 216 | second_desc = acpi_ns_get_secondary_object(object); |
1da177e4 LT |
217 | if (second_desc) { |
218 | /* | |
219 | * Free the region_context if and only if the handler is one of the | |
220 | * default handlers -- and therefore, we created the context object | |
221 | * locally, it was not created by an external caller. | |
222 | */ | |
223 | handler_desc = object->region.handler; | |
224 | if (handler_desc) { | |
61686124 | 225 | if (handler_desc->address_space.handler_flags & |
4be44fcd | 226 | ACPI_ADDR_HANDLER_DEFAULT_INSTALLED) { |
793c2388 BM |
227 | |
228 | /* Deactivate region and free region context */ | |
229 | ||
230 | if (handler_desc->address_space.setup) { | |
231 | (void)handler_desc-> | |
232 | address_space.setup(object, | |
233 | ACPI_REGION_DEACTIVATE, | |
234 | handler_desc-> | |
235 | address_space. | |
236 | context, | |
237 | &second_desc-> | |
238 | extra. | |
239 | region_context); | |
240 | } | |
1da177e4 LT |
241 | } |
242 | ||
4be44fcd | 243 | acpi_ut_remove_reference(handler_desc); |
1da177e4 LT |
244 | } |
245 | ||
246 | /* Now we can free the Extra object */ | |
247 | ||
4be44fcd | 248 | acpi_ut_delete_object_desc(second_desc); |
1da177e4 LT |
249 | } |
250 | break; | |
251 | ||
1da177e4 LT |
252 | case ACPI_TYPE_BUFFER_FIELD: |
253 | ||
4be44fcd LB |
254 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
255 | "***** Buffer Field %p\n", object)); | |
1da177e4 | 256 | |
4be44fcd | 257 | second_desc = acpi_ns_get_secondary_object(object); |
1da177e4 | 258 | if (second_desc) { |
ef805d95 LM |
259 | acpi_ut_delete_object_desc(second_desc); |
260 | } | |
261 | break; | |
262 | ||
263 | case ACPI_TYPE_LOCAL_BANK_FIELD: | |
264 | ||
265 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, | |
266 | "***** Bank Field %p\n", object)); | |
267 | ||
268 | second_desc = acpi_ns_get_secondary_object(object); | |
269 | if (second_desc) { | |
4be44fcd | 270 | acpi_ut_delete_object_desc(second_desc); |
1da177e4 LT |
271 | } |
272 | break; | |
273 | ||
1da177e4 LT |
274 | default: |
275 | break; | |
276 | } | |
277 | ||
278 | /* Free any allocated memory (pointer within the object) found above */ | |
279 | ||
280 | if (obj_pointer) { | |
4be44fcd LB |
281 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
282 | "Deleting Object Subptr %p\n", obj_pointer)); | |
8313524a | 283 | ACPI_FREE(obj_pointer); |
1da177e4 LT |
284 | } |
285 | ||
286 | /* Now the object can be safely deleted */ | |
287 | ||
4be44fcd LB |
288 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, "Deleting Object %p [%s]\n", |
289 | object, acpi_ut_get_object_type_name(object))); | |
1da177e4 | 290 | |
4be44fcd | 291 | acpi_ut_delete_object_desc(object); |
1da177e4 LT |
292 | return_VOID; |
293 | } | |
294 | ||
1da177e4 LT |
295 | /******************************************************************************* |
296 | * | |
297 | * FUNCTION: acpi_ut_delete_internal_object_list | |
298 | * | |
44f6c012 | 299 | * PARAMETERS: obj_list - Pointer to the list to be deleted |
1da177e4 LT |
300 | * |
301 | * RETURN: None | |
302 | * | |
303 | * DESCRIPTION: This function deletes an internal object list, including both | |
304 | * simple objects and package objects | |
305 | * | |
306 | ******************************************************************************/ | |
307 | ||
4be44fcd | 308 | void acpi_ut_delete_internal_object_list(union acpi_operand_object **obj_list) |
1da177e4 | 309 | { |
4be44fcd | 310 | union acpi_operand_object **internal_obj; |
1da177e4 | 311 | |
b229cf92 | 312 | ACPI_FUNCTION_TRACE(ut_delete_internal_object_list); |
1da177e4 LT |
313 | |
314 | /* Walk the null-terminated internal list */ | |
315 | ||
316 | for (internal_obj = obj_list; *internal_obj; internal_obj++) { | |
4be44fcd | 317 | acpi_ut_remove_reference(*internal_obj); |
1da177e4 LT |
318 | } |
319 | ||
320 | /* Free the combined parameter pointer list and object array */ | |
321 | ||
8313524a | 322 | ACPI_FREE(obj_list); |
1da177e4 LT |
323 | return_VOID; |
324 | } | |
325 | ||
1da177e4 LT |
326 | /******************************************************************************* |
327 | * | |
328 | * FUNCTION: acpi_ut_update_ref_count | |
329 | * | |
44f6c012 | 330 | * PARAMETERS: Object - Object whose ref count is to be updated |
1da177e4 LT |
331 | * Action - What to do |
332 | * | |
333 | * RETURN: New ref count | |
334 | * | |
335 | * DESCRIPTION: Modify the ref count and return it. | |
336 | * | |
337 | ******************************************************************************/ | |
338 | ||
339 | static void | |
4be44fcd | 340 | acpi_ut_update_ref_count(union acpi_operand_object *object, u32 action) |
1da177e4 | 341 | { |
4be44fcd LB |
342 | u16 count; |
343 | u16 new_count; | |
1da177e4 | 344 | |
b229cf92 | 345 | ACPI_FUNCTION_NAME(ut_update_ref_count); |
1da177e4 LT |
346 | |
347 | if (!object) { | |
348 | return; | |
349 | } | |
350 | ||
351 | count = object->common.reference_count; | |
352 | new_count = count; | |
353 | ||
354 | /* | |
4119532c | 355 | * Perform the reference count action (increment, decrement, force delete) |
1da177e4 LT |
356 | */ |
357 | switch (action) { | |
1da177e4 LT |
358 | case REF_INCREMENT: |
359 | ||
360 | new_count++; | |
361 | object->common.reference_count = new_count; | |
362 | ||
4be44fcd LB |
363 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
364 | "Obj %p Refs=%X, [Incremented]\n", | |
365 | object, new_count)); | |
1da177e4 LT |
366 | break; |
367 | ||
1da177e4 LT |
368 | case REF_DECREMENT: |
369 | ||
370 | if (count < 1) { | |
4be44fcd LB |
371 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
372 | "Obj %p Refs=%X, can't decrement! (Set to 0)\n", | |
373 | object, new_count)); | |
1da177e4 LT |
374 | |
375 | new_count = 0; | |
4be44fcd | 376 | } else { |
1da177e4 LT |
377 | new_count--; |
378 | ||
4be44fcd LB |
379 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
380 | "Obj %p Refs=%X, [Decremented]\n", | |
381 | object, new_count)); | |
1da177e4 LT |
382 | } |
383 | ||
4be44fcd LB |
384 | if (ACPI_GET_OBJECT_TYPE(object) == ACPI_TYPE_METHOD) { |
385 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, | |
386 | "Method Obj %p Refs=%X, [Decremented]\n", | |
387 | object, new_count)); | |
1da177e4 LT |
388 | } |
389 | ||
390 | object->common.reference_count = new_count; | |
391 | if (new_count == 0) { | |
4be44fcd | 392 | acpi_ut_delete_internal_obj(object); |
1da177e4 | 393 | } |
1da177e4 LT |
394 | break; |
395 | ||
1da177e4 LT |
396 | case REF_FORCE_DELETE: |
397 | ||
4be44fcd LB |
398 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
399 | "Obj %p Refs=%X, Force delete! (Set to 0)\n", | |
400 | object, count)); | |
1da177e4 LT |
401 | |
402 | new_count = 0; | |
403 | object->common.reference_count = new_count; | |
4be44fcd | 404 | acpi_ut_delete_internal_obj(object); |
1da177e4 LT |
405 | break; |
406 | ||
1da177e4 LT |
407 | default: |
408 | ||
b8e4d893 | 409 | ACPI_ERROR((AE_INFO, "Unknown action (%X)", action)); |
1da177e4 LT |
410 | break; |
411 | } | |
412 | ||
413 | /* | |
414 | * Sanity check the reference count, for debug purposes only. | |
415 | * (A deleted object will have a huge reference count) | |
416 | */ | |
417 | if (count > ACPI_MAX_REFERENCE_COUNT) { | |
b8e4d893 | 418 | ACPI_WARNING((AE_INFO, |
4119532c BM |
419 | "Large Reference Count (%X) in object %p", count, |
420 | object)); | |
1da177e4 | 421 | } |
1da177e4 LT |
422 | } |
423 | ||
1da177e4 LT |
424 | /******************************************************************************* |
425 | * | |
426 | * FUNCTION: acpi_ut_update_object_reference | |
427 | * | |
44f6c012 | 428 | * PARAMETERS: Object - Increment ref count for this object |
1da177e4 LT |
429 | * and all sub-objects |
430 | * Action - Either REF_INCREMENT or REF_DECREMENT or | |
431 | * REF_FORCE_DELETE | |
432 | * | |
433 | * RETURN: Status | |
434 | * | |
435 | * DESCRIPTION: Increment the object reference count | |
436 | * | |
437 | * Object references are incremented when: | |
438 | * 1) An object is attached to a Node (namespace object) | |
439 | * 2) An object is copied (all subobjects must be incremented) | |
440 | * | |
441 | * Object references are decremented when: | |
442 | * 1) An object is detached from an Node | |
443 | * | |
444 | ******************************************************************************/ | |
445 | ||
446 | acpi_status | |
4119532c | 447 | acpi_ut_update_object_reference(union acpi_operand_object *object, u16 action) |
1da177e4 | 448 | { |
4be44fcd LB |
449 | acpi_status status = AE_OK; |
450 | union acpi_generic_state *state_list = NULL; | |
451 | union acpi_operand_object *next_object = NULL; | |
452 | union acpi_generic_state *state; | |
67a119f9 | 453 | u32 i; |
1da177e4 | 454 | |
b229cf92 | 455 | ACPI_FUNCTION_TRACE_PTR(ut_update_object_reference, object); |
1da177e4 | 456 | |
f9f4601f | 457 | while (object) { |
52fc0b02 | 458 | |
f9f4601f | 459 | /* Make sure that this isn't a namespace handle */ |
1da177e4 | 460 | |
4be44fcd LB |
461 | if (ACPI_GET_DESCRIPTOR_TYPE(object) == ACPI_DESC_TYPE_NAMED) { |
462 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, | |
463 | "Object %p is NS handle\n", object)); | |
464 | return_ACPI_STATUS(AE_OK); | |
f9f4601f | 465 | } |
1da177e4 LT |
466 | |
467 | /* | |
468 | * All sub-objects must have their reference count incremented also. | |
469 | * Different object types have different subobjects. | |
470 | */ | |
4be44fcd | 471 | switch (ACPI_GET_OBJECT_TYPE(object)) { |
1da177e4 | 472 | case ACPI_TYPE_DEVICE: |
f6dd9221 BM |
473 | case ACPI_TYPE_PROCESSOR: |
474 | case ACPI_TYPE_POWER: | |
475 | case ACPI_TYPE_THERMAL: | |
1da177e4 | 476 | |
f6dd9221 BM |
477 | /* Update the notify objects for these types (if present) */ |
478 | ||
479 | acpi_ut_update_ref_count(object->common_notify. | |
480 | system_notify, action); | |
481 | acpi_ut_update_ref_count(object->common_notify. | |
482 | device_notify, action); | |
1da177e4 LT |
483 | break; |
484 | ||
1da177e4 | 485 | case ACPI_TYPE_PACKAGE: |
1da177e4 | 486 | /* |
f9f4601f RM |
487 | * We must update all the sub-objects of the package, |
488 | * each of whom may have their own sub-objects. | |
1da177e4 LT |
489 | */ |
490 | for (i = 0; i < object->package.count; i++) { | |
491 | /* | |
492 | * Push each element onto the stack for later processing. | |
493 | * Note: There can be null elements within the package, | |
494 | * these are simply ignored | |
495 | */ | |
4be44fcd LB |
496 | status = |
497 | acpi_ut_create_update_state_and_push | |
498 | (object->package.elements[i], action, | |
499 | &state_list); | |
500 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
501 | goto error_exit; |
502 | } | |
1da177e4 LT |
503 | } |
504 | break; | |
505 | ||
1da177e4 LT |
506 | case ACPI_TYPE_BUFFER_FIELD: |
507 | ||
f9f4601f | 508 | next_object = object->buffer_field.buffer_obj; |
1da177e4 LT |
509 | break; |
510 | ||
1da177e4 LT |
511 | case ACPI_TYPE_LOCAL_REGION_FIELD: |
512 | ||
f9f4601f RM |
513 | next_object = object->field.region_obj; |
514 | break; | |
1da177e4 LT |
515 | |
516 | case ACPI_TYPE_LOCAL_BANK_FIELD: | |
517 | ||
f9f4601f | 518 | next_object = object->bank_field.bank_obj; |
4be44fcd LB |
519 | status = |
520 | acpi_ut_create_update_state_and_push(object-> | |
521 | bank_field. | |
522 | region_obj, | |
523 | action, | |
524 | &state_list); | |
525 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
526 | goto error_exit; |
527 | } | |
1da177e4 LT |
528 | break; |
529 | ||
1da177e4 LT |
530 | case ACPI_TYPE_LOCAL_INDEX_FIELD: |
531 | ||
f9f4601f | 532 | next_object = object->index_field.index_obj; |
4be44fcd LB |
533 | status = |
534 | acpi_ut_create_update_state_and_push(object-> | |
535 | index_field. | |
536 | data_obj, | |
537 | action, | |
538 | &state_list); | |
539 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
540 | goto error_exit; |
541 | } | |
1da177e4 LT |
542 | break; |
543 | ||
1da177e4 | 544 | case ACPI_TYPE_LOCAL_REFERENCE: |
1da177e4 | 545 | /* |
9e41d93c BM |
546 | * The target of an Index (a package, string, or buffer) or a named |
547 | * reference must track changes to the ref count of the index or | |
548 | * target object. | |
1da177e4 | 549 | */ |
1044f1f6 BM |
550 | if ((object->reference.class == ACPI_REFCLASS_INDEX) || |
551 | (object->reference.class == ACPI_REFCLASS_NAME)) { | |
f9f4601f | 552 | next_object = object->reference.object; |
1da177e4 LT |
553 | } |
554 | break; | |
555 | ||
1da177e4 LT |
556 | case ACPI_TYPE_REGION: |
557 | default: | |
4119532c | 558 | break; /* No subobjects for all other types */ |
1da177e4 LT |
559 | } |
560 | ||
561 | /* | |
4119532c | 562 | * Now we can update the count in the main object. This can only |
1da177e4 LT |
563 | * happen after we update the sub-objects in case this causes the |
564 | * main object to be deleted. | |
565 | */ | |
4be44fcd | 566 | acpi_ut_update_ref_count(object, action); |
f9f4601f | 567 | object = NULL; |
1da177e4 LT |
568 | |
569 | /* Move on to the next object to be updated */ | |
570 | ||
f9f4601f RM |
571 | if (next_object) { |
572 | object = next_object; | |
573 | next_object = NULL; | |
4be44fcd LB |
574 | } else if (state_list) { |
575 | state = acpi_ut_pop_generic_state(&state_list); | |
f9f4601f | 576 | object = state->update.object; |
4be44fcd | 577 | acpi_ut_delete_generic_state(state); |
f9f4601f | 578 | } |
1da177e4 LT |
579 | } |
580 | ||
4be44fcd | 581 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 582 | |
4be44fcd | 583 | error_exit: |
1da177e4 | 584 | |
b8e4d893 BM |
585 | ACPI_EXCEPTION((AE_INFO, status, |
586 | "Could not update object reference count")); | |
1da177e4 | 587 | |
cf058bd1 LM |
588 | /* Free any stacked Update State objects */ |
589 | ||
590 | while (state_list) { | |
591 | state = acpi_ut_pop_generic_state(&state_list); | |
592 | acpi_ut_delete_generic_state(state); | |
593 | } | |
594 | ||
4be44fcd | 595 | return_ACPI_STATUS(status); |
1da177e4 LT |
596 | } |
597 | ||
1da177e4 LT |
598 | /******************************************************************************* |
599 | * | |
600 | * FUNCTION: acpi_ut_add_reference | |
601 | * | |
44f6c012 RM |
602 | * PARAMETERS: Object - Object whose reference count is to be |
603 | * incremented | |
1da177e4 LT |
604 | * |
605 | * RETURN: None | |
606 | * | |
607 | * DESCRIPTION: Add one reference to an ACPI object | |
608 | * | |
609 | ******************************************************************************/ | |
610 | ||
4be44fcd | 611 | void acpi_ut_add_reference(union acpi_operand_object *object) |
1da177e4 LT |
612 | { |
613 | ||
b229cf92 | 614 | ACPI_FUNCTION_TRACE_PTR(ut_add_reference, object); |
1da177e4 LT |
615 | |
616 | /* Ensure that we have a valid object */ | |
617 | ||
4be44fcd | 618 | if (!acpi_ut_valid_internal_object(object)) { |
1da177e4 LT |
619 | return_VOID; |
620 | } | |
621 | ||
4be44fcd LB |
622 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
623 | "Obj %p Current Refs=%X [To Be Incremented]\n", | |
624 | object, object->common.reference_count)); | |
1da177e4 LT |
625 | |
626 | /* Increment the reference count */ | |
627 | ||
4be44fcd | 628 | (void)acpi_ut_update_object_reference(object, REF_INCREMENT); |
1da177e4 LT |
629 | return_VOID; |
630 | } | |
631 | ||
1da177e4 LT |
632 | /******************************************************************************* |
633 | * | |
634 | * FUNCTION: acpi_ut_remove_reference | |
635 | * | |
44f6c012 | 636 | * PARAMETERS: Object - Object whose ref count will be decremented |
1da177e4 LT |
637 | * |
638 | * RETURN: None | |
639 | * | |
640 | * DESCRIPTION: Decrement the reference count of an ACPI internal object | |
641 | * | |
642 | ******************************************************************************/ | |
643 | ||
4be44fcd | 644 | void acpi_ut_remove_reference(union acpi_operand_object *object) |
1da177e4 LT |
645 | { |
646 | ||
b229cf92 | 647 | ACPI_FUNCTION_TRACE_PTR(ut_remove_reference, object); |
1da177e4 LT |
648 | |
649 | /* | |
4119532c BM |
650 | * Allow a NULL pointer to be passed in, just ignore it. This saves |
651 | * each caller from having to check. Also, ignore NS nodes. | |
1da177e4 LT |
652 | * |
653 | */ | |
654 | if (!object || | |
4be44fcd | 655 | (ACPI_GET_DESCRIPTOR_TYPE(object) == ACPI_DESC_TYPE_NAMED)) { |
1da177e4 LT |
656 | return_VOID; |
657 | } | |
658 | ||
659 | /* Ensure that we have a valid object */ | |
660 | ||
4be44fcd | 661 | if (!acpi_ut_valid_internal_object(object)) { |
1da177e4 LT |
662 | return_VOID; |
663 | } | |
664 | ||
4be44fcd LB |
665 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
666 | "Obj %p Current Refs=%X [To Be Decremented]\n", | |
667 | object, object->common.reference_count)); | |
1da177e4 LT |
668 | |
669 | /* | |
670 | * Decrement the reference count, and only actually delete the object | |
4119532c | 671 | * if the reference count becomes 0. (Must also decrement the ref count |
1da177e4 LT |
672 | * of all subobjects!) |
673 | */ | |
4be44fcd | 674 | (void)acpi_ut_update_object_reference(object, REF_DECREMENT); |
1da177e4 LT |
675 | return_VOID; |
676 | } |