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 | 44 | #include <acpi/acpi.h> |
50df4d8b | 45 | #include <acpi/accommon.h> |
1da177e4 LT |
46 | #include <acpi/acinterp.h> |
47 | #include <acpi/acnamesp.h> | |
48 | #include <acpi/acevents.h> | |
1da177e4 LT |
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 | ||
2843ae77 BM |
138 | /* |
139 | * These objects have a possible list of notify handlers. | |
140 | * Device object also may have a GPE block. | |
141 | */ | |
1da177e4 LT |
142 | case ACPI_TYPE_DEVICE: |
143 | ||
144 | if (object->device.gpe_block) { | |
4be44fcd LB |
145 | (void)acpi_ev_delete_gpe_block(object->device. |
146 | gpe_block); | |
1da177e4 LT |
147 | } |
148 | ||
2843ae77 BM |
149 | /*lint -fallthrough */ |
150 | ||
151 | case ACPI_TYPE_PROCESSOR: | |
152 | case ACPI_TYPE_THERMAL: | |
153 | ||
154 | /* Walk the notify handler list for this object */ | |
1da177e4 | 155 | |
2843ae77 | 156 | handler_desc = object->common_notify.handler; |
1da177e4 LT |
157 | while (handler_desc) { |
158 | next_desc = handler_desc->address_space.next; | |
4be44fcd | 159 | acpi_ut_remove_reference(handler_desc); |
1da177e4 LT |
160 | handler_desc = next_desc; |
161 | } | |
162 | break; | |
163 | ||
1da177e4 LT |
164 | case ACPI_TYPE_MUTEX: |
165 | ||
4be44fcd | 166 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
967440e3 BM |
167 | "***** Mutex %p, OS Mutex %p\n", |
168 | object, object->mutex.os_mutex)); | |
169 | ||
ba886cd4 | 170 | if (object == acpi_gbl_global_lock_mutex) { |
c81da666 BM |
171 | |
172 | /* Global Lock has extra semaphore */ | |
967440e3 BM |
173 | |
174 | (void) | |
175 | acpi_os_delete_semaphore | |
176 | (acpi_gbl_global_lock_semaphore); | |
177 | acpi_gbl_global_lock_semaphore = NULL; | |
c81da666 BM |
178 | |
179 | acpi_os_delete_mutex(object->mutex.os_mutex); | |
180 | acpi_gbl_global_lock_mutex = NULL; | |
181 | } else { | |
262a7a28 | 182 | acpi_ex_unlink_mutex(object); |
c81da666 | 183 | acpi_os_delete_mutex(object->mutex.os_mutex); |
967440e3 | 184 | } |
1da177e4 LT |
185 | break; |
186 | ||
1da177e4 LT |
187 | case ACPI_TYPE_EVENT: |
188 | ||
4be44fcd | 189 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
967440e3 BM |
190 | "***** Event %p, OS Semaphore %p\n", |
191 | object, object->event.os_semaphore)); | |
1da177e4 | 192 | |
967440e3 BM |
193 | (void)acpi_os_delete_semaphore(object->event.os_semaphore); |
194 | object->event.os_semaphore = NULL; | |
1da177e4 LT |
195 | break; |
196 | ||
1da177e4 LT |
197 | case ACPI_TYPE_METHOD: |
198 | ||
4be44fcd LB |
199 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
200 | "***** Method %p\n", object)); | |
1da177e4 | 201 | |
967440e3 | 202 | /* Delete the method mutex if it exists */ |
1da177e4 | 203 | |
967440e3 BM |
204 | if (object->method.mutex) { |
205 | acpi_os_delete_mutex(object->method.mutex->mutex. | |
206 | os_mutex); | |
207 | acpi_ut_delete_object_desc(object->method.mutex); | |
208 | object->method.mutex = NULL; | |
1da177e4 LT |
209 | } |
210 | break; | |
211 | ||
1da177e4 LT |
212 | case ACPI_TYPE_REGION: |
213 | ||
4be44fcd LB |
214 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
215 | "***** Region %p\n", object)); | |
1da177e4 | 216 | |
4be44fcd | 217 | second_desc = acpi_ns_get_secondary_object(object); |
1da177e4 LT |
218 | if (second_desc) { |
219 | /* | |
220 | * Free the region_context if and only if the handler is one of the | |
221 | * default handlers -- and therefore, we created the context object | |
222 | * locally, it was not created by an external caller. | |
223 | */ | |
224 | handler_desc = object->region.handler; | |
225 | if (handler_desc) { | |
61686124 | 226 | if (handler_desc->address_space.handler_flags & |
4be44fcd | 227 | ACPI_ADDR_HANDLER_DEFAULT_INSTALLED) { |
793c2388 BM |
228 | |
229 | /* Deactivate region and free region context */ | |
230 | ||
231 | if (handler_desc->address_space.setup) { | |
232 | (void)handler_desc-> | |
233 | address_space.setup(object, | |
234 | ACPI_REGION_DEACTIVATE, | |
235 | handler_desc-> | |
236 | address_space. | |
237 | context, | |
238 | &second_desc-> | |
239 | extra. | |
240 | region_context); | |
241 | } | |
1da177e4 LT |
242 | } |
243 | ||
4be44fcd | 244 | acpi_ut_remove_reference(handler_desc); |
1da177e4 LT |
245 | } |
246 | ||
247 | /* Now we can free the Extra object */ | |
248 | ||
4be44fcd | 249 | acpi_ut_delete_object_desc(second_desc); |
1da177e4 LT |
250 | } |
251 | break; | |
252 | ||
1da177e4 LT |
253 | case ACPI_TYPE_BUFFER_FIELD: |
254 | ||
4be44fcd LB |
255 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
256 | "***** Buffer Field %p\n", object)); | |
1da177e4 | 257 | |
4be44fcd | 258 | second_desc = acpi_ns_get_secondary_object(object); |
1da177e4 | 259 | if (second_desc) { |
ef805d95 LM |
260 | acpi_ut_delete_object_desc(second_desc); |
261 | } | |
262 | break; | |
263 | ||
264 | case ACPI_TYPE_LOCAL_BANK_FIELD: | |
265 | ||
266 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, | |
267 | "***** Bank Field %p\n", object)); | |
268 | ||
269 | second_desc = acpi_ns_get_secondary_object(object); | |
270 | if (second_desc) { | |
4be44fcd | 271 | acpi_ut_delete_object_desc(second_desc); |
1da177e4 LT |
272 | } |
273 | break; | |
274 | ||
1da177e4 LT |
275 | default: |
276 | break; | |
277 | } | |
278 | ||
279 | /* Free any allocated memory (pointer within the object) found above */ | |
280 | ||
281 | if (obj_pointer) { | |
4be44fcd LB |
282 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
283 | "Deleting Object Subptr %p\n", obj_pointer)); | |
8313524a | 284 | ACPI_FREE(obj_pointer); |
1da177e4 LT |
285 | } |
286 | ||
287 | /* Now the object can be safely deleted */ | |
288 | ||
4be44fcd LB |
289 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, "Deleting Object %p [%s]\n", |
290 | object, acpi_ut_get_object_type_name(object))); | |
1da177e4 | 291 | |
4be44fcd | 292 | acpi_ut_delete_object_desc(object); |
1da177e4 LT |
293 | return_VOID; |
294 | } | |
295 | ||
1da177e4 LT |
296 | /******************************************************************************* |
297 | * | |
298 | * FUNCTION: acpi_ut_delete_internal_object_list | |
299 | * | |
44f6c012 | 300 | * PARAMETERS: obj_list - Pointer to the list to be deleted |
1da177e4 LT |
301 | * |
302 | * RETURN: None | |
303 | * | |
304 | * DESCRIPTION: This function deletes an internal object list, including both | |
305 | * simple objects and package objects | |
306 | * | |
307 | ******************************************************************************/ | |
308 | ||
4be44fcd | 309 | void acpi_ut_delete_internal_object_list(union acpi_operand_object **obj_list) |
1da177e4 | 310 | { |
4be44fcd | 311 | union acpi_operand_object **internal_obj; |
1da177e4 | 312 | |
b229cf92 | 313 | ACPI_FUNCTION_TRACE(ut_delete_internal_object_list); |
1da177e4 LT |
314 | |
315 | /* Walk the null-terminated internal list */ | |
316 | ||
317 | for (internal_obj = obj_list; *internal_obj; internal_obj++) { | |
4be44fcd | 318 | acpi_ut_remove_reference(*internal_obj); |
1da177e4 LT |
319 | } |
320 | ||
321 | /* Free the combined parameter pointer list and object array */ | |
322 | ||
8313524a | 323 | ACPI_FREE(obj_list); |
1da177e4 LT |
324 | return_VOID; |
325 | } | |
326 | ||
1da177e4 LT |
327 | /******************************************************************************* |
328 | * | |
329 | * FUNCTION: acpi_ut_update_ref_count | |
330 | * | |
44f6c012 | 331 | * PARAMETERS: Object - Object whose ref count is to be updated |
1da177e4 LT |
332 | * Action - What to do |
333 | * | |
334 | * RETURN: New ref count | |
335 | * | |
336 | * DESCRIPTION: Modify the ref count and return it. | |
337 | * | |
338 | ******************************************************************************/ | |
339 | ||
340 | static void | |
4be44fcd | 341 | acpi_ut_update_ref_count(union acpi_operand_object *object, u32 action) |
1da177e4 | 342 | { |
4be44fcd LB |
343 | u16 count; |
344 | u16 new_count; | |
1da177e4 | 345 | |
b229cf92 | 346 | ACPI_FUNCTION_NAME(ut_update_ref_count); |
1da177e4 LT |
347 | |
348 | if (!object) { | |
349 | return; | |
350 | } | |
351 | ||
352 | count = object->common.reference_count; | |
353 | new_count = count; | |
354 | ||
355 | /* | |
4119532c | 356 | * Perform the reference count action (increment, decrement, force delete) |
1da177e4 LT |
357 | */ |
358 | switch (action) { | |
1da177e4 LT |
359 | case REF_INCREMENT: |
360 | ||
361 | new_count++; | |
362 | object->common.reference_count = new_count; | |
363 | ||
4be44fcd LB |
364 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
365 | "Obj %p Refs=%X, [Incremented]\n", | |
366 | object, new_count)); | |
1da177e4 LT |
367 | break; |
368 | ||
1da177e4 LT |
369 | case REF_DECREMENT: |
370 | ||
371 | if (count < 1) { | |
4be44fcd LB |
372 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
373 | "Obj %p Refs=%X, can't decrement! (Set to 0)\n", | |
374 | object, new_count)); | |
1da177e4 LT |
375 | |
376 | new_count = 0; | |
4be44fcd | 377 | } else { |
1da177e4 LT |
378 | new_count--; |
379 | ||
4be44fcd LB |
380 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
381 | "Obj %p Refs=%X, [Decremented]\n", | |
382 | object, new_count)); | |
1da177e4 LT |
383 | } |
384 | ||
4be44fcd LB |
385 | if (ACPI_GET_OBJECT_TYPE(object) == ACPI_TYPE_METHOD) { |
386 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, | |
387 | "Method Obj %p Refs=%X, [Decremented]\n", | |
388 | object, new_count)); | |
1da177e4 LT |
389 | } |
390 | ||
391 | object->common.reference_count = new_count; | |
392 | if (new_count == 0) { | |
4be44fcd | 393 | acpi_ut_delete_internal_obj(object); |
1da177e4 | 394 | } |
1da177e4 LT |
395 | break; |
396 | ||
1da177e4 LT |
397 | case REF_FORCE_DELETE: |
398 | ||
4be44fcd LB |
399 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
400 | "Obj %p Refs=%X, Force delete! (Set to 0)\n", | |
401 | object, count)); | |
1da177e4 LT |
402 | |
403 | new_count = 0; | |
404 | object->common.reference_count = new_count; | |
4be44fcd | 405 | acpi_ut_delete_internal_obj(object); |
1da177e4 LT |
406 | break; |
407 | ||
1da177e4 LT |
408 | default: |
409 | ||
b8e4d893 | 410 | ACPI_ERROR((AE_INFO, "Unknown action (%X)", action)); |
1da177e4 LT |
411 | break; |
412 | } | |
413 | ||
414 | /* | |
415 | * Sanity check the reference count, for debug purposes only. | |
416 | * (A deleted object will have a huge reference count) | |
417 | */ | |
418 | if (count > ACPI_MAX_REFERENCE_COUNT) { | |
b8e4d893 | 419 | ACPI_WARNING((AE_INFO, |
4119532c BM |
420 | "Large Reference Count (%X) in object %p", count, |
421 | object)); | |
1da177e4 | 422 | } |
1da177e4 LT |
423 | } |
424 | ||
1da177e4 LT |
425 | /******************************************************************************* |
426 | * | |
427 | * FUNCTION: acpi_ut_update_object_reference | |
428 | * | |
44f6c012 | 429 | * PARAMETERS: Object - Increment ref count for this object |
1da177e4 LT |
430 | * and all sub-objects |
431 | * Action - Either REF_INCREMENT or REF_DECREMENT or | |
432 | * REF_FORCE_DELETE | |
433 | * | |
434 | * RETURN: Status | |
435 | * | |
436 | * DESCRIPTION: Increment the object reference count | |
437 | * | |
438 | * Object references are incremented when: | |
439 | * 1) An object is attached to a Node (namespace object) | |
440 | * 2) An object is copied (all subobjects must be incremented) | |
441 | * | |
442 | * Object references are decremented when: | |
443 | * 1) An object is detached from an Node | |
444 | * | |
445 | ******************************************************************************/ | |
446 | ||
447 | acpi_status | |
4119532c | 448 | acpi_ut_update_object_reference(union acpi_operand_object *object, u16 action) |
1da177e4 | 449 | { |
4be44fcd LB |
450 | acpi_status status = AE_OK; |
451 | union acpi_generic_state *state_list = NULL; | |
452 | union acpi_operand_object *next_object = NULL; | |
453 | union acpi_generic_state *state; | |
67a119f9 | 454 | u32 i; |
1da177e4 | 455 | |
b229cf92 | 456 | ACPI_FUNCTION_TRACE_PTR(ut_update_object_reference, object); |
1da177e4 | 457 | |
f9f4601f | 458 | while (object) { |
52fc0b02 | 459 | |
f9f4601f | 460 | /* Make sure that this isn't a namespace handle */ |
1da177e4 | 461 | |
4be44fcd LB |
462 | if (ACPI_GET_DESCRIPTOR_TYPE(object) == ACPI_DESC_TYPE_NAMED) { |
463 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, | |
464 | "Object %p is NS handle\n", object)); | |
465 | return_ACPI_STATUS(AE_OK); | |
f9f4601f | 466 | } |
1da177e4 LT |
467 | |
468 | /* | |
469 | * All sub-objects must have their reference count incremented also. | |
470 | * Different object types have different subobjects. | |
471 | */ | |
4be44fcd | 472 | switch (ACPI_GET_OBJECT_TYPE(object)) { |
1da177e4 | 473 | case ACPI_TYPE_DEVICE: |
f6dd9221 BM |
474 | case ACPI_TYPE_PROCESSOR: |
475 | case ACPI_TYPE_POWER: | |
476 | case ACPI_TYPE_THERMAL: | |
1da177e4 | 477 | |
f6dd9221 BM |
478 | /* Update the notify objects for these types (if present) */ |
479 | ||
480 | acpi_ut_update_ref_count(object->common_notify. | |
481 | system_notify, action); | |
482 | acpi_ut_update_ref_count(object->common_notify. | |
483 | device_notify, action); | |
1da177e4 LT |
484 | break; |
485 | ||
1da177e4 | 486 | case ACPI_TYPE_PACKAGE: |
1da177e4 | 487 | /* |
f9f4601f RM |
488 | * We must update all the sub-objects of the package, |
489 | * each of whom may have their own sub-objects. | |
1da177e4 LT |
490 | */ |
491 | for (i = 0; i < object->package.count; i++) { | |
492 | /* | |
493 | * Push each element onto the stack for later processing. | |
494 | * Note: There can be null elements within the package, | |
495 | * these are simply ignored | |
496 | */ | |
4be44fcd LB |
497 | status = |
498 | acpi_ut_create_update_state_and_push | |
499 | (object->package.elements[i], action, | |
500 | &state_list); | |
501 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
502 | goto error_exit; |
503 | } | |
1da177e4 LT |
504 | } |
505 | break; | |
506 | ||
1da177e4 LT |
507 | case ACPI_TYPE_BUFFER_FIELD: |
508 | ||
f9f4601f | 509 | next_object = object->buffer_field.buffer_obj; |
1da177e4 LT |
510 | break; |
511 | ||
1da177e4 LT |
512 | case ACPI_TYPE_LOCAL_REGION_FIELD: |
513 | ||
f9f4601f RM |
514 | next_object = object->field.region_obj; |
515 | break; | |
1da177e4 LT |
516 | |
517 | case ACPI_TYPE_LOCAL_BANK_FIELD: | |
518 | ||
f9f4601f | 519 | next_object = object->bank_field.bank_obj; |
4be44fcd LB |
520 | status = |
521 | acpi_ut_create_update_state_and_push(object-> | |
522 | bank_field. | |
523 | region_obj, | |
524 | action, | |
525 | &state_list); | |
526 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
527 | goto error_exit; |
528 | } | |
1da177e4 LT |
529 | break; |
530 | ||
1da177e4 LT |
531 | case ACPI_TYPE_LOCAL_INDEX_FIELD: |
532 | ||
f9f4601f | 533 | next_object = object->index_field.index_obj; |
4be44fcd LB |
534 | status = |
535 | acpi_ut_create_update_state_and_push(object-> | |
536 | index_field. | |
537 | data_obj, | |
538 | action, | |
539 | &state_list); | |
540 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
541 | goto error_exit; |
542 | } | |
1da177e4 LT |
543 | break; |
544 | ||
1da177e4 | 545 | case ACPI_TYPE_LOCAL_REFERENCE: |
1da177e4 | 546 | /* |
9e41d93c BM |
547 | * The target of an Index (a package, string, or buffer) or a named |
548 | * reference must track changes to the ref count of the index or | |
549 | * target object. | |
1da177e4 | 550 | */ |
1044f1f6 BM |
551 | if ((object->reference.class == ACPI_REFCLASS_INDEX) || |
552 | (object->reference.class == ACPI_REFCLASS_NAME)) { | |
f9f4601f | 553 | next_object = object->reference.object; |
1da177e4 LT |
554 | } |
555 | break; | |
556 | ||
1da177e4 LT |
557 | case ACPI_TYPE_REGION: |
558 | default: | |
4119532c | 559 | break; /* No subobjects for all other types */ |
1da177e4 LT |
560 | } |
561 | ||
562 | /* | |
4119532c | 563 | * Now we can update the count in the main object. This can only |
1da177e4 LT |
564 | * happen after we update the sub-objects in case this causes the |
565 | * main object to be deleted. | |
566 | */ | |
4be44fcd | 567 | acpi_ut_update_ref_count(object, action); |
f9f4601f | 568 | object = NULL; |
1da177e4 LT |
569 | |
570 | /* Move on to the next object to be updated */ | |
571 | ||
f9f4601f RM |
572 | if (next_object) { |
573 | object = next_object; | |
574 | next_object = NULL; | |
4be44fcd LB |
575 | } else if (state_list) { |
576 | state = acpi_ut_pop_generic_state(&state_list); | |
f9f4601f | 577 | object = state->update.object; |
4be44fcd | 578 | acpi_ut_delete_generic_state(state); |
f9f4601f | 579 | } |
1da177e4 LT |
580 | } |
581 | ||
4be44fcd | 582 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 583 | |
4be44fcd | 584 | error_exit: |
1da177e4 | 585 | |
b8e4d893 BM |
586 | ACPI_EXCEPTION((AE_INFO, status, |
587 | "Could not update object reference count")); | |
1da177e4 | 588 | |
cf058bd1 LM |
589 | /* Free any stacked Update State objects */ |
590 | ||
591 | while (state_list) { | |
592 | state = acpi_ut_pop_generic_state(&state_list); | |
593 | acpi_ut_delete_generic_state(state); | |
594 | } | |
595 | ||
4be44fcd | 596 | return_ACPI_STATUS(status); |
1da177e4 LT |
597 | } |
598 | ||
1da177e4 LT |
599 | /******************************************************************************* |
600 | * | |
601 | * FUNCTION: acpi_ut_add_reference | |
602 | * | |
44f6c012 RM |
603 | * PARAMETERS: Object - Object whose reference count is to be |
604 | * incremented | |
1da177e4 LT |
605 | * |
606 | * RETURN: None | |
607 | * | |
608 | * DESCRIPTION: Add one reference to an ACPI object | |
609 | * | |
610 | ******************************************************************************/ | |
611 | ||
4be44fcd | 612 | void acpi_ut_add_reference(union acpi_operand_object *object) |
1da177e4 LT |
613 | { |
614 | ||
b229cf92 | 615 | ACPI_FUNCTION_TRACE_PTR(ut_add_reference, object); |
1da177e4 LT |
616 | |
617 | /* Ensure that we have a valid object */ | |
618 | ||
4be44fcd | 619 | if (!acpi_ut_valid_internal_object(object)) { |
1da177e4 LT |
620 | return_VOID; |
621 | } | |
622 | ||
4be44fcd LB |
623 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
624 | "Obj %p Current Refs=%X [To Be Incremented]\n", | |
625 | object, object->common.reference_count)); | |
1da177e4 LT |
626 | |
627 | /* Increment the reference count */ | |
628 | ||
4be44fcd | 629 | (void)acpi_ut_update_object_reference(object, REF_INCREMENT); |
1da177e4 LT |
630 | return_VOID; |
631 | } | |
632 | ||
1da177e4 LT |
633 | /******************************************************************************* |
634 | * | |
635 | * FUNCTION: acpi_ut_remove_reference | |
636 | * | |
44f6c012 | 637 | * PARAMETERS: Object - Object whose ref count will be decremented |
1da177e4 LT |
638 | * |
639 | * RETURN: None | |
640 | * | |
641 | * DESCRIPTION: Decrement the reference count of an ACPI internal object | |
642 | * | |
643 | ******************************************************************************/ | |
644 | ||
4be44fcd | 645 | void acpi_ut_remove_reference(union acpi_operand_object *object) |
1da177e4 LT |
646 | { |
647 | ||
b229cf92 | 648 | ACPI_FUNCTION_TRACE_PTR(ut_remove_reference, object); |
1da177e4 LT |
649 | |
650 | /* | |
4119532c BM |
651 | * Allow a NULL pointer to be passed in, just ignore it. This saves |
652 | * each caller from having to check. Also, ignore NS nodes. | |
1da177e4 LT |
653 | * |
654 | */ | |
655 | if (!object || | |
4be44fcd | 656 | (ACPI_GET_DESCRIPTOR_TYPE(object) == ACPI_DESC_TYPE_NAMED)) { |
1da177e4 LT |
657 | return_VOID; |
658 | } | |
659 | ||
660 | /* Ensure that we have a valid object */ | |
661 | ||
4be44fcd | 662 | if (!acpi_ut_valid_internal_object(object)) { |
1da177e4 LT |
663 | return_VOID; |
664 | } | |
665 | ||
4be44fcd LB |
666 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
667 | "Obj %p Current Refs=%X [To Be Decremented]\n", | |
668 | object, object->common.reference_count)); | |
1da177e4 LT |
669 | |
670 | /* | |
671 | * Decrement the reference count, and only actually delete the object | |
4119532c | 672 | * if the reference count becomes 0. (Must also decrement the ref count |
1da177e4 LT |
673 | * of all subobjects!) |
674 | */ | |
4be44fcd | 675 | (void)acpi_ut_update_object_reference(object, REF_DECREMENT); |
1da177e4 LT |
676 | return_VOID; |
677 | } |