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 | /* | |
25f044e6 | 8 | * Copyright (C) 2000 - 2013, 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> |
e2f7a777 LB |
45 | #include "accommon.h" |
46 | #include "acinterp.h" | |
47 | #include "acnamesp.h" | |
48 | #include "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 | * | |
ba494bee | 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; | |
3362a6ba | 78 | union acpi_operand_object **last_obj_ptr; |
1da177e4 | 79 | |
b229cf92 | 80 | ACPI_FUNCTION_TRACE_PTR(ut_delete_internal_obj, object); |
1da177e4 LT |
81 | |
82 | if (!object) { | |
83 | return_VOID; | |
84 | } | |
85 | ||
86 | /* | |
87 | * Must delete or free any pointers within the object that are not | |
88 | * actual ACPI objects (for example, a raw buffer pointer). | |
89 | */ | |
3371c19c | 90 | switch (object->common.type) { |
1da177e4 LT |
91 | case ACPI_TYPE_STRING: |
92 | ||
4be44fcd LB |
93 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
94 | "**** String %p, ptr %p\n", object, | |
95 | object->string.pointer)); | |
1da177e4 LT |
96 | |
97 | /* Free the actual string buffer */ | |
98 | ||
99 | if (!(object->common.flags & AOPOBJ_STATIC_POINTER)) { | |
52fc0b02 | 100 | |
1da177e4 LT |
101 | /* But only if it is NOT a pointer into an ACPI table */ |
102 | ||
103 | obj_pointer = object->string.pointer; | |
104 | } | |
105 | break; | |
106 | ||
1da177e4 LT |
107 | case ACPI_TYPE_BUFFER: |
108 | ||
4be44fcd LB |
109 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
110 | "**** Buffer %p, ptr %p\n", object, | |
111 | object->buffer.pointer)); | |
1da177e4 LT |
112 | |
113 | /* Free the actual buffer */ | |
114 | ||
115 | if (!(object->common.flags & AOPOBJ_STATIC_POINTER)) { | |
52fc0b02 | 116 | |
1da177e4 LT |
117 | /* But only if it is NOT a pointer into an ACPI table */ |
118 | ||
119 | obj_pointer = object->buffer.pointer; | |
120 | } | |
121 | break; | |
122 | ||
1da177e4 LT |
123 | case ACPI_TYPE_PACKAGE: |
124 | ||
4be44fcd LB |
125 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
126 | " **** Package of count %X\n", | |
127 | object->package.count)); | |
1da177e4 LT |
128 | |
129 | /* | |
130 | * Elements of the package are not handled here, they are deleted | |
131 | * separately | |
132 | */ | |
133 | ||
134 | /* Free the (variable length) element pointer array */ | |
135 | ||
136 | obj_pointer = object->package.elements; | |
137 | break; | |
138 | ||
2843ae77 BM |
139 | /* |
140 | * These objects have a possible list of notify handlers. | |
141 | * Device object also may have a GPE block. | |
142 | */ | |
1da177e4 LT |
143 | case ACPI_TYPE_DEVICE: |
144 | ||
145 | if (object->device.gpe_block) { | |
4be44fcd LB |
146 | (void)acpi_ev_delete_gpe_block(object->device. |
147 | gpe_block); | |
1da177e4 LT |
148 | } |
149 | ||
2843ae77 BM |
150 | /*lint -fallthrough */ |
151 | ||
152 | case ACPI_TYPE_PROCESSOR: | |
153 | case ACPI_TYPE_THERMAL: | |
154 | ||
86ed4bc8 | 155 | /* Walk the address handler list for this object */ |
1da177e4 | 156 | |
2843ae77 | 157 | handler_desc = object->common_notify.handler; |
1da177e4 LT |
158 | while (handler_desc) { |
159 | next_desc = handler_desc->address_space.next; | |
4be44fcd | 160 | acpi_ut_remove_reference(handler_desc); |
1da177e4 LT |
161 | handler_desc = next_desc; |
162 | } | |
163 | break; | |
164 | ||
1da177e4 LT |
165 | case ACPI_TYPE_MUTEX: |
166 | ||
4be44fcd | 167 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
967440e3 BM |
168 | "***** Mutex %p, OS Mutex %p\n", |
169 | object, object->mutex.os_mutex)); | |
170 | ||
ba886cd4 | 171 | if (object == acpi_gbl_global_lock_mutex) { |
c81da666 BM |
172 | |
173 | /* Global Lock has extra semaphore */ | |
967440e3 BM |
174 | |
175 | (void) | |
176 | acpi_os_delete_semaphore | |
177 | (acpi_gbl_global_lock_semaphore); | |
178 | acpi_gbl_global_lock_semaphore = NULL; | |
c81da666 BM |
179 | |
180 | acpi_os_delete_mutex(object->mutex.os_mutex); | |
181 | acpi_gbl_global_lock_mutex = NULL; | |
182 | } else { | |
262a7a28 | 183 | acpi_ex_unlink_mutex(object); |
c81da666 | 184 | acpi_os_delete_mutex(object->mutex.os_mutex); |
967440e3 | 185 | } |
1da177e4 LT |
186 | break; |
187 | ||
1da177e4 LT |
188 | case ACPI_TYPE_EVENT: |
189 | ||
4be44fcd | 190 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
967440e3 BM |
191 | "***** Event %p, OS Semaphore %p\n", |
192 | object, object->event.os_semaphore)); | |
1da177e4 | 193 | |
967440e3 BM |
194 | (void)acpi_os_delete_semaphore(object->event.os_semaphore); |
195 | object->event.os_semaphore = NULL; | |
1da177e4 LT |
196 | break; |
197 | ||
1da177e4 LT |
198 | case ACPI_TYPE_METHOD: |
199 | ||
4be44fcd LB |
200 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
201 | "***** Method %p\n", object)); | |
1da177e4 | 202 | |
967440e3 | 203 | /* Delete the method mutex if it exists */ |
1da177e4 | 204 | |
967440e3 BM |
205 | if (object->method.mutex) { |
206 | acpi_os_delete_mutex(object->method.mutex->mutex. | |
207 | os_mutex); | |
208 | acpi_ut_delete_object_desc(object->method.mutex); | |
209 | object->method.mutex = NULL; | |
1da177e4 LT |
210 | } |
211 | break; | |
212 | ||
1da177e4 LT |
213 | case ACPI_TYPE_REGION: |
214 | ||
4be44fcd LB |
215 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
216 | "***** Region %p\n", object)); | |
1da177e4 | 217 | |
f654c0fe LM |
218 | /* |
219 | * Update address_range list. However, only permanent regions | |
220 | * are installed in this list. (Not created within a method) | |
221 | */ | |
222 | if (!(object->region.node->flags & ANOBJ_TEMPORARY)) { | |
223 | acpi_ut_remove_address_range(object->region.space_id, | |
224 | object->region.node); | |
225 | } | |
a5fe1a03 | 226 | |
4be44fcd | 227 | second_desc = acpi_ns_get_secondary_object(object); |
1da177e4 LT |
228 | if (second_desc) { |
229 | /* | |
230 | * Free the region_context if and only if the handler is one of the | |
231 | * default handlers -- and therefore, we created the context object | |
232 | * locally, it was not created by an external caller. | |
233 | */ | |
234 | handler_desc = object->region.handler; | |
235 | if (handler_desc) { | |
3362a6ba LM |
236 | next_desc = |
237 | handler_desc->address_space.region_list; | |
238 | last_obj_ptr = | |
239 | &handler_desc->address_space.region_list; | |
240 | ||
241 | /* Remove the region object from the handler's list */ | |
242 | ||
243 | while (next_desc) { | |
244 | if (next_desc == object) { | |
245 | *last_obj_ptr = | |
246 | next_desc->region.next; | |
247 | break; | |
248 | } | |
249 | ||
250 | /* Walk the linked list of handler */ | |
251 | ||
252 | last_obj_ptr = &next_desc->region.next; | |
253 | next_desc = next_desc->region.next; | |
254 | } | |
255 | ||
61686124 | 256 | if (handler_desc->address_space.handler_flags & |
4be44fcd | 257 | ACPI_ADDR_HANDLER_DEFAULT_INSTALLED) { |
793c2388 BM |
258 | |
259 | /* Deactivate region and free region context */ | |
260 | ||
261 | if (handler_desc->address_space.setup) { | |
262 | (void)handler_desc-> | |
263 | address_space.setup(object, | |
264 | ACPI_REGION_DEACTIVATE, | |
265 | handler_desc-> | |
266 | address_space. | |
267 | context, | |
268 | &second_desc-> | |
269 | extra. | |
270 | region_context); | |
271 | } | |
1da177e4 LT |
272 | } |
273 | ||
4be44fcd | 274 | acpi_ut_remove_reference(handler_desc); |
1da177e4 LT |
275 | } |
276 | ||
277 | /* Now we can free the Extra object */ | |
278 | ||
4be44fcd | 279 | acpi_ut_delete_object_desc(second_desc); |
1da177e4 LT |
280 | } |
281 | break; | |
282 | ||
1da177e4 LT |
283 | case ACPI_TYPE_BUFFER_FIELD: |
284 | ||
4be44fcd LB |
285 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
286 | "***** Buffer Field %p\n", object)); | |
1da177e4 | 287 | |
4be44fcd | 288 | second_desc = acpi_ns_get_secondary_object(object); |
1da177e4 | 289 | if (second_desc) { |
ef805d95 LM |
290 | acpi_ut_delete_object_desc(second_desc); |
291 | } | |
292 | break; | |
293 | ||
294 | case ACPI_TYPE_LOCAL_BANK_FIELD: | |
295 | ||
296 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, | |
297 | "***** Bank Field %p\n", object)); | |
298 | ||
299 | second_desc = acpi_ns_get_secondary_object(object); | |
300 | if (second_desc) { | |
4be44fcd | 301 | acpi_ut_delete_object_desc(second_desc); |
1da177e4 LT |
302 | } |
303 | break; | |
304 | ||
1da177e4 LT |
305 | default: |
306 | break; | |
307 | } | |
308 | ||
309 | /* Free any allocated memory (pointer within the object) found above */ | |
310 | ||
311 | if (obj_pointer) { | |
4be44fcd LB |
312 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
313 | "Deleting Object Subptr %p\n", obj_pointer)); | |
8313524a | 314 | ACPI_FREE(obj_pointer); |
1da177e4 LT |
315 | } |
316 | ||
317 | /* Now the object can be safely deleted */ | |
318 | ||
4be44fcd LB |
319 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, "Deleting Object %p [%s]\n", |
320 | object, acpi_ut_get_object_type_name(object))); | |
1da177e4 | 321 | |
4be44fcd | 322 | acpi_ut_delete_object_desc(object); |
1da177e4 LT |
323 | return_VOID; |
324 | } | |
325 | ||
1da177e4 LT |
326 | /******************************************************************************* |
327 | * | |
328 | * FUNCTION: acpi_ut_delete_internal_object_list | |
329 | * | |
44f6c012 | 330 | * PARAMETERS: obj_list - Pointer to the list to be deleted |
1da177e4 LT |
331 | * |
332 | * RETURN: None | |
333 | * | |
334 | * DESCRIPTION: This function deletes an internal object list, including both | |
335 | * simple objects and package objects | |
336 | * | |
337 | ******************************************************************************/ | |
338 | ||
4be44fcd | 339 | void acpi_ut_delete_internal_object_list(union acpi_operand_object **obj_list) |
1da177e4 | 340 | { |
4be44fcd | 341 | union acpi_operand_object **internal_obj; |
1da177e4 | 342 | |
c8d586f8 | 343 | ACPI_FUNCTION_ENTRY(); |
1da177e4 LT |
344 | |
345 | /* Walk the null-terminated internal list */ | |
346 | ||
347 | for (internal_obj = obj_list; *internal_obj; internal_obj++) { | |
4be44fcd | 348 | acpi_ut_remove_reference(*internal_obj); |
1da177e4 LT |
349 | } |
350 | ||
351 | /* Free the combined parameter pointer list and object array */ | |
352 | ||
8313524a | 353 | ACPI_FREE(obj_list); |
0e770b32 | 354 | return; |
1da177e4 LT |
355 | } |
356 | ||
1da177e4 LT |
357 | /******************************************************************************* |
358 | * | |
359 | * FUNCTION: acpi_ut_update_ref_count | |
360 | * | |
ba494bee BM |
361 | * PARAMETERS: object - Object whose ref count is to be updated |
362 | * action - What to do | |
1da177e4 LT |
363 | * |
364 | * RETURN: New ref count | |
365 | * | |
366 | * DESCRIPTION: Modify the ref count and return it. | |
367 | * | |
368 | ******************************************************************************/ | |
369 | ||
370 | static void | |
4be44fcd | 371 | acpi_ut_update_ref_count(union acpi_operand_object *object, u32 action) |
1da177e4 | 372 | { |
4be44fcd LB |
373 | u16 count; |
374 | u16 new_count; | |
1da177e4 | 375 | |
b229cf92 | 376 | ACPI_FUNCTION_NAME(ut_update_ref_count); |
1da177e4 LT |
377 | |
378 | if (!object) { | |
379 | return; | |
380 | } | |
381 | ||
382 | count = object->common.reference_count; | |
383 | new_count = count; | |
384 | ||
385 | /* | |
4119532c | 386 | * Perform the reference count action (increment, decrement, force delete) |
1da177e4 LT |
387 | */ |
388 | switch (action) { | |
1da177e4 LT |
389 | case REF_INCREMENT: |
390 | ||
391 | new_count++; | |
392 | object->common.reference_count = new_count; | |
393 | ||
4be44fcd LB |
394 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
395 | "Obj %p Refs=%X, [Incremented]\n", | |
396 | object, new_count)); | |
1da177e4 LT |
397 | break; |
398 | ||
1da177e4 LT |
399 | case REF_DECREMENT: |
400 | ||
401 | if (count < 1) { | |
4be44fcd LB |
402 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
403 | "Obj %p Refs=%X, can't decrement! (Set to 0)\n", | |
404 | object, new_count)); | |
1da177e4 LT |
405 | |
406 | new_count = 0; | |
4be44fcd | 407 | } else { |
1da177e4 LT |
408 | new_count--; |
409 | ||
4be44fcd LB |
410 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
411 | "Obj %p Refs=%X, [Decremented]\n", | |
412 | object, new_count)); | |
1da177e4 LT |
413 | } |
414 | ||
3371c19c | 415 | if (object->common.type == ACPI_TYPE_METHOD) { |
4be44fcd LB |
416 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
417 | "Method Obj %p Refs=%X, [Decremented]\n", | |
418 | object, new_count)); | |
1da177e4 LT |
419 | } |
420 | ||
421 | object->common.reference_count = new_count; | |
422 | if (new_count == 0) { | |
4be44fcd | 423 | acpi_ut_delete_internal_obj(object); |
1da177e4 | 424 | } |
1da177e4 LT |
425 | break; |
426 | ||
1da177e4 LT |
427 | case REF_FORCE_DELETE: |
428 | ||
4be44fcd LB |
429 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
430 | "Obj %p Refs=%X, Force delete! (Set to 0)\n", | |
431 | object, count)); | |
1da177e4 LT |
432 | |
433 | new_count = 0; | |
434 | object->common.reference_count = new_count; | |
4be44fcd | 435 | acpi_ut_delete_internal_obj(object); |
1da177e4 LT |
436 | break; |
437 | ||
1da177e4 LT |
438 | default: |
439 | ||
f6a22b0b | 440 | ACPI_ERROR((AE_INFO, "Unknown action (0x%X)", action)); |
1da177e4 LT |
441 | break; |
442 | } | |
443 | ||
444 | /* | |
445 | * Sanity check the reference count, for debug purposes only. | |
446 | * (A deleted object will have a huge reference count) | |
447 | */ | |
448 | if (count > ACPI_MAX_REFERENCE_COUNT) { | |
b8e4d893 | 449 | ACPI_WARNING((AE_INFO, |
f6a22b0b BM |
450 | "Large Reference Count (0x%X) in object %p", |
451 | count, object)); | |
1da177e4 | 452 | } |
1da177e4 LT |
453 | } |
454 | ||
1da177e4 LT |
455 | /******************************************************************************* |
456 | * | |
457 | * FUNCTION: acpi_ut_update_object_reference | |
458 | * | |
ba494bee | 459 | * PARAMETERS: object - Increment ref count for this object |
1da177e4 | 460 | * and all sub-objects |
ba494bee | 461 | * action - Either REF_INCREMENT or REF_DECREMENT or |
1da177e4 LT |
462 | * REF_FORCE_DELETE |
463 | * | |
464 | * RETURN: Status | |
465 | * | |
466 | * DESCRIPTION: Increment the object reference count | |
467 | * | |
468 | * Object references are incremented when: | |
469 | * 1) An object is attached to a Node (namespace object) | |
470 | * 2) An object is copied (all subobjects must be incremented) | |
471 | * | |
472 | * Object references are decremented when: | |
473 | * 1) An object is detached from an Node | |
474 | * | |
475 | ******************************************************************************/ | |
476 | ||
477 | acpi_status | |
4119532c | 478 | acpi_ut_update_object_reference(union acpi_operand_object *object, u16 action) |
1da177e4 | 479 | { |
4be44fcd LB |
480 | acpi_status status = AE_OK; |
481 | union acpi_generic_state *state_list = NULL; | |
482 | union acpi_operand_object *next_object = NULL; | |
86ed4bc8 | 483 | union acpi_operand_object *prev_object; |
4be44fcd | 484 | union acpi_generic_state *state; |
67a119f9 | 485 | u32 i; |
1da177e4 | 486 | |
0e770b32 | 487 | ACPI_FUNCTION_NAME(ut_update_object_reference); |
1da177e4 | 488 | |
f9f4601f | 489 | while (object) { |
52fc0b02 | 490 | |
f9f4601f | 491 | /* Make sure that this isn't a namespace handle */ |
1da177e4 | 492 | |
4be44fcd LB |
493 | if (ACPI_GET_DESCRIPTOR_TYPE(object) == ACPI_DESC_TYPE_NAMED) { |
494 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, | |
495 | "Object %p is NS handle\n", object)); | |
0e770b32 | 496 | return (AE_OK); |
f9f4601f | 497 | } |
1da177e4 LT |
498 | |
499 | /* | |
500 | * All sub-objects must have their reference count incremented also. | |
501 | * Different object types have different subobjects. | |
502 | */ | |
3371c19c | 503 | switch (object->common.type) { |
1da177e4 | 504 | case ACPI_TYPE_DEVICE: |
f6dd9221 BM |
505 | case ACPI_TYPE_PROCESSOR: |
506 | case ACPI_TYPE_POWER: | |
507 | case ACPI_TYPE_THERMAL: | |
1da177e4 | 508 | |
86ed4bc8 BM |
509 | /* |
510 | * Update the notify objects for these types (if present) | |
511 | * Two lists, system and device notify handlers. | |
512 | */ | |
513 | for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) { | |
514 | prev_object = | |
515 | object->common_notify.notify_list[i]; | |
516 | while (prev_object) { | |
517 | next_object = | |
518 | prev_object->notify.next[i]; | |
519 | acpi_ut_update_ref_count(prev_object, | |
520 | action); | |
521 | prev_object = next_object; | |
522 | } | |
523 | } | |
1da177e4 LT |
524 | break; |
525 | ||
1da177e4 | 526 | case ACPI_TYPE_PACKAGE: |
1da177e4 | 527 | /* |
f9f4601f RM |
528 | * We must update all the sub-objects of the package, |
529 | * each of whom may have their own sub-objects. | |
1da177e4 LT |
530 | */ |
531 | for (i = 0; i < object->package.count; i++) { | |
532 | /* | |
53938551 CG |
533 | * Null package elements are legal and can be simply |
534 | * ignored. | |
1da177e4 | 535 | */ |
53938551 CG |
536 | next_object = object->package.elements[i]; |
537 | if (!next_object) { | |
538 | continue; | |
539 | } | |
540 | ||
541 | switch (next_object->common.type) { | |
542 | case ACPI_TYPE_INTEGER: | |
543 | case ACPI_TYPE_STRING: | |
544 | case ACPI_TYPE_BUFFER: | |
545 | /* | |
546 | * For these very simple sub-objects, we can just | |
547 | * update the reference count here and continue. | |
548 | * Greatly increases performance of this operation. | |
549 | */ | |
550 | acpi_ut_update_ref_count(next_object, | |
551 | action); | |
552 | break; | |
553 | ||
554 | default: | |
555 | /* | |
556 | * For complex sub-objects, push them onto the stack | |
557 | * for later processing (this eliminates recursion.) | |
558 | */ | |
559 | status = | |
560 | acpi_ut_create_update_state_and_push | |
561 | (next_object, action, &state_list); | |
562 | if (ACPI_FAILURE(status)) { | |
563 | goto error_exit; | |
564 | } | |
565 | break; | |
1da177e4 | 566 | } |
1da177e4 | 567 | } |
53938551 | 568 | next_object = NULL; |
1da177e4 LT |
569 | break; |
570 | ||
1da177e4 LT |
571 | case ACPI_TYPE_BUFFER_FIELD: |
572 | ||
f9f4601f | 573 | next_object = object->buffer_field.buffer_obj; |
1da177e4 LT |
574 | break; |
575 | ||
1da177e4 LT |
576 | case ACPI_TYPE_LOCAL_REGION_FIELD: |
577 | ||
f9f4601f RM |
578 | next_object = object->field.region_obj; |
579 | break; | |
1da177e4 LT |
580 | |
581 | case ACPI_TYPE_LOCAL_BANK_FIELD: | |
582 | ||
f9f4601f | 583 | next_object = object->bank_field.bank_obj; |
4be44fcd LB |
584 | status = |
585 | acpi_ut_create_update_state_and_push(object-> | |
586 | bank_field. | |
587 | region_obj, | |
588 | action, | |
589 | &state_list); | |
590 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
591 | goto error_exit; |
592 | } | |
1da177e4 LT |
593 | break; |
594 | ||
1da177e4 LT |
595 | case ACPI_TYPE_LOCAL_INDEX_FIELD: |
596 | ||
f9f4601f | 597 | next_object = object->index_field.index_obj; |
4be44fcd LB |
598 | status = |
599 | acpi_ut_create_update_state_and_push(object-> | |
600 | index_field. | |
601 | data_obj, | |
602 | action, | |
603 | &state_list); | |
604 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
605 | goto error_exit; |
606 | } | |
1da177e4 LT |
607 | break; |
608 | ||
1da177e4 | 609 | case ACPI_TYPE_LOCAL_REFERENCE: |
1da177e4 | 610 | /* |
9e41d93c BM |
611 | * The target of an Index (a package, string, or buffer) or a named |
612 | * reference must track changes to the ref count of the index or | |
613 | * target object. | |
1da177e4 | 614 | */ |
1044f1f6 BM |
615 | if ((object->reference.class == ACPI_REFCLASS_INDEX) || |
616 | (object->reference.class == ACPI_REFCLASS_NAME)) { | |
f9f4601f | 617 | next_object = object->reference.object; |
1da177e4 LT |
618 | } |
619 | break; | |
620 | ||
1da177e4 LT |
621 | case ACPI_TYPE_REGION: |
622 | default: | |
4119532c | 623 | break; /* No subobjects for all other types */ |
1da177e4 LT |
624 | } |
625 | ||
626 | /* | |
4119532c | 627 | * Now we can update the count in the main object. This can only |
1da177e4 LT |
628 | * happen after we update the sub-objects in case this causes the |
629 | * main object to be deleted. | |
630 | */ | |
4be44fcd | 631 | acpi_ut_update_ref_count(object, action); |
f9f4601f | 632 | object = NULL; |
1da177e4 LT |
633 | |
634 | /* Move on to the next object to be updated */ | |
635 | ||
f9f4601f RM |
636 | if (next_object) { |
637 | object = next_object; | |
638 | next_object = NULL; | |
4be44fcd LB |
639 | } else if (state_list) { |
640 | state = acpi_ut_pop_generic_state(&state_list); | |
f9f4601f | 641 | object = state->update.object; |
4be44fcd | 642 | acpi_ut_delete_generic_state(state); |
f9f4601f | 643 | } |
1da177e4 LT |
644 | } |
645 | ||
0e770b32 | 646 | return (AE_OK); |
1da177e4 | 647 | |
4be44fcd | 648 | error_exit: |
1da177e4 | 649 | |
b8e4d893 BM |
650 | ACPI_EXCEPTION((AE_INFO, status, |
651 | "Could not update object reference count")); | |
1da177e4 | 652 | |
cf058bd1 LM |
653 | /* Free any stacked Update State objects */ |
654 | ||
655 | while (state_list) { | |
656 | state = acpi_ut_pop_generic_state(&state_list); | |
657 | acpi_ut_delete_generic_state(state); | |
658 | } | |
659 | ||
0e770b32 | 660 | return (status); |
1da177e4 LT |
661 | } |
662 | ||
1da177e4 LT |
663 | /******************************************************************************* |
664 | * | |
665 | * FUNCTION: acpi_ut_add_reference | |
666 | * | |
ba494bee | 667 | * PARAMETERS: object - Object whose reference count is to be |
44f6c012 | 668 | * incremented |
1da177e4 LT |
669 | * |
670 | * RETURN: None | |
671 | * | |
672 | * DESCRIPTION: Add one reference to an ACPI object | |
673 | * | |
674 | ******************************************************************************/ | |
675 | ||
4be44fcd | 676 | void acpi_ut_add_reference(union acpi_operand_object *object) |
1da177e4 LT |
677 | { |
678 | ||
0e770b32 | 679 | ACPI_FUNCTION_NAME(ut_add_reference); |
1da177e4 LT |
680 | |
681 | /* Ensure that we have a valid object */ | |
682 | ||
4be44fcd | 683 | if (!acpi_ut_valid_internal_object(object)) { |
0e770b32 | 684 | return; |
1da177e4 LT |
685 | } |
686 | ||
4be44fcd LB |
687 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
688 | "Obj %p Current Refs=%X [To Be Incremented]\n", | |
689 | object, object->common.reference_count)); | |
1da177e4 LT |
690 | |
691 | /* Increment the reference count */ | |
692 | ||
4be44fcd | 693 | (void)acpi_ut_update_object_reference(object, REF_INCREMENT); |
0e770b32 | 694 | return; |
1da177e4 LT |
695 | } |
696 | ||
1da177e4 LT |
697 | /******************************************************************************* |
698 | * | |
699 | * FUNCTION: acpi_ut_remove_reference | |
700 | * | |
ba494bee | 701 | * PARAMETERS: object - Object whose ref count will be decremented |
1da177e4 LT |
702 | * |
703 | * RETURN: None | |
704 | * | |
705 | * DESCRIPTION: Decrement the reference count of an ACPI internal object | |
706 | * | |
707 | ******************************************************************************/ | |
708 | ||
4be44fcd | 709 | void acpi_ut_remove_reference(union acpi_operand_object *object) |
1da177e4 LT |
710 | { |
711 | ||
0e770b32 | 712 | ACPI_FUNCTION_NAME(ut_remove_reference); |
1da177e4 LT |
713 | |
714 | /* | |
4119532c BM |
715 | * Allow a NULL pointer to be passed in, just ignore it. This saves |
716 | * each caller from having to check. Also, ignore NS nodes. | |
1da177e4 LT |
717 | * |
718 | */ | |
719 | if (!object || | |
4be44fcd | 720 | (ACPI_GET_DESCRIPTOR_TYPE(object) == ACPI_DESC_TYPE_NAMED)) { |
0e770b32 | 721 | return; |
1da177e4 LT |
722 | } |
723 | ||
724 | /* Ensure that we have a valid object */ | |
725 | ||
4be44fcd | 726 | if (!acpi_ut_valid_internal_object(object)) { |
0e770b32 | 727 | return; |
1da177e4 LT |
728 | } |
729 | ||
4be44fcd LB |
730 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, |
731 | "Obj %p Current Refs=%X [To Be Decremented]\n", | |
732 | object, object->common.reference_count)); | |
1da177e4 LT |
733 | |
734 | /* | |
735 | * Decrement the reference count, and only actually delete the object | |
4119532c | 736 | * if the reference count becomes 0. (Must also decrement the ref count |
1da177e4 LT |
737 | * of all subobjects!) |
738 | */ | |
4be44fcd | 739 | (void)acpi_ut_update_object_reference(object, REF_DECREMENT); |
0e770b32 | 740 | return; |
1da177e4 | 741 | } |