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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: dsmethod - Parser/Interpreter interface - control method parsing | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
8 | * Copyright (C) 2000 - 2005, R. Byron Moore | |
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 | ||
44 | ||
45 | #include <acpi/acpi.h> | |
46 | #include <acpi/acparser.h> | |
47 | #include <acpi/amlcode.h> | |
48 | #include <acpi/acdispat.h> | |
49 | #include <acpi/acinterp.h> | |
50 | #include <acpi/acnamesp.h> | |
51 | ||
52 | ||
53 | #define _COMPONENT ACPI_DISPATCHER | |
54 | ACPI_MODULE_NAME ("dsmethod") | |
55 | ||
56 | ||
57 | /******************************************************************************* | |
58 | * | |
59 | * FUNCTION: acpi_ds_parse_method | |
60 | * | |
61 | * PARAMETERS: obj_handle - Method node | |
62 | * | |
63 | * RETURN: Status | |
64 | * | |
65 | * DESCRIPTION: Call the parser and parse the AML that is associated with the | |
66 | * method. | |
67 | * | |
68 | * MUTEX: Assumes parser is locked | |
69 | * | |
70 | ******************************************************************************/ | |
71 | ||
72 | acpi_status | |
73 | acpi_ds_parse_method ( | |
74 | acpi_handle obj_handle) | |
75 | { | |
76 | acpi_status status; | |
77 | union acpi_operand_object *obj_desc; | |
78 | union acpi_parse_object *op; | |
79 | struct acpi_namespace_node *node; | |
1da177e4 LT |
80 | struct acpi_walk_state *walk_state; |
81 | ||
82 | ||
83 | ACPI_FUNCTION_TRACE_PTR ("ds_parse_method", obj_handle); | |
84 | ||
85 | ||
86 | /* Parameter Validation */ | |
87 | ||
88 | if (!obj_handle) { | |
89 | return_ACPI_STATUS (AE_NULL_ENTRY); | |
90 | } | |
91 | ||
92 | ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "**** Parsing [%4.4s] **** named_obj=%p\n", | |
93 | acpi_ut_get_node_name (obj_handle), obj_handle)); | |
94 | ||
95 | /* Extract the method object from the method Node */ | |
96 | ||
97 | node = (struct acpi_namespace_node *) obj_handle; | |
98 | obj_desc = acpi_ns_get_attached_object (node); | |
99 | if (!obj_desc) { | |
100 | return_ACPI_STATUS (AE_NULL_OBJECT); | |
101 | } | |
102 | ||
103 | /* Create a mutex for the method if there is a concurrency limit */ | |
104 | ||
105 | if ((obj_desc->method.concurrency != ACPI_INFINITE_CONCURRENCY) && | |
106 | (!obj_desc->method.semaphore)) { | |
107 | status = acpi_os_create_semaphore (obj_desc->method.concurrency, | |
108 | obj_desc->method.concurrency, | |
109 | &obj_desc->method.semaphore); | |
110 | if (ACPI_FAILURE (status)) { | |
111 | return_ACPI_STATUS (status); | |
112 | } | |
113 | } | |
114 | ||
115 | /* | |
116 | * Allocate a new parser op to be the root of the parsed | |
117 | * method tree | |
118 | */ | |
119 | op = acpi_ps_alloc_op (AML_METHOD_OP); | |
120 | if (!op) { | |
121 | return_ACPI_STATUS (AE_NO_MEMORY); | |
122 | } | |
123 | ||
124 | /* Init new op with the method name and pointer back to the Node */ | |
125 | ||
126 | acpi_ps_set_name (op, node->name.integer); | |
127 | op->common.node = node; | |
128 | ||
129 | /* | |
130 | * Get a new owner_id for objects created by this method. Namespace | |
131 | * objects (such as Operation Regions) can be created during the | |
132 | * first pass parse. | |
133 | */ | |
f9f4601f RM |
134 | status = acpi_ut_allocate_owner_id (&obj_desc->method.owner_id); |
135 | if (ACPI_FAILURE (status)) { | |
136 | goto cleanup; | |
137 | } | |
1da177e4 LT |
138 | |
139 | /* Create and initialize a new walk state */ | |
140 | ||
f9f4601f RM |
141 | walk_state = acpi_ds_create_walk_state ( |
142 | obj_desc->method.owner_id, NULL, NULL, NULL); | |
1da177e4 | 143 | if (!walk_state) { |
88ac00f5 | 144 | status = AE_NO_MEMORY; |
f9f4601f | 145 | goto cleanup2; |
1da177e4 LT |
146 | } |
147 | ||
148 | status = acpi_ds_init_aml_walk (walk_state, op, node, | |
149 | obj_desc->method.aml_start, | |
150 | obj_desc->method.aml_length, NULL, 1); | |
151 | if (ACPI_FAILURE (status)) { | |
152 | acpi_ds_delete_walk_state (walk_state); | |
f9f4601f | 153 | goto cleanup2; |
1da177e4 LT |
154 | } |
155 | ||
156 | /* | |
157 | * Parse the method, first pass | |
158 | * | |
44f6c012 RM |
159 | * The first pass load is where newly declared named objects are added into |
160 | * the namespace. Actual evaluation of the named objects (what would be | |
161 | * called a "second pass") happens during the actual execution of the | |
162 | * method so that operands to the named objects can take on dynamic | |
163 | * run-time values. | |
1da177e4 LT |
164 | */ |
165 | status = acpi_ps_parse_aml (walk_state); | |
166 | if (ACPI_FAILURE (status)) { | |
f9f4601f | 167 | goto cleanup2; |
1da177e4 LT |
168 | } |
169 | ||
170 | ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, | |
171 | "**** [%4.4s] Parsed **** named_obj=%p Op=%p\n", | |
172 | acpi_ut_get_node_name (obj_handle), obj_handle, op)); | |
173 | ||
f9f4601f RM |
174 | cleanup2: |
175 | (void) acpi_ut_release_owner_id (obj_desc->method.owner_id); | |
176 | ||
88ac00f5 | 177 | cleanup: |
1da177e4 LT |
178 | acpi_ps_delete_parse_tree (op); |
179 | return_ACPI_STATUS (status); | |
180 | } | |
181 | ||
182 | ||
183 | /******************************************************************************* | |
184 | * | |
185 | * FUNCTION: acpi_ds_begin_method_execution | |
186 | * | |
187 | * PARAMETERS: method_node - Node of the method | |
188 | * obj_desc - The method object | |
189 | * calling_method_node - Caller of this method (if non-null) | |
190 | * | |
191 | * RETURN: Status | |
192 | * | |
193 | * DESCRIPTION: Prepare a method for execution. Parses the method if necessary, | |
194 | * increments the thread count, and waits at the method semaphore | |
195 | * for clearance to execute. | |
196 | * | |
197 | ******************************************************************************/ | |
198 | ||
199 | acpi_status | |
200 | acpi_ds_begin_method_execution ( | |
201 | struct acpi_namespace_node *method_node, | |
202 | union acpi_operand_object *obj_desc, | |
203 | struct acpi_namespace_node *calling_method_node) | |
204 | { | |
205 | acpi_status status = AE_OK; | |
206 | ||
207 | ||
208 | ACPI_FUNCTION_TRACE_PTR ("ds_begin_method_execution", method_node); | |
209 | ||
210 | ||
211 | if (!method_node) { | |
212 | return_ACPI_STATUS (AE_NULL_ENTRY); | |
213 | } | |
214 | ||
215 | /* | |
216 | * If there is a concurrency limit on this method, we need to | |
217 | * obtain a unit from the method semaphore. | |
218 | */ | |
219 | if (obj_desc->method.semaphore) { | |
220 | /* | |
221 | * Allow recursive method calls, up to the reentrancy/concurrency | |
222 | * limit imposed by the SERIALIZED rule and the sync_level method | |
223 | * parameter. | |
224 | * | |
225 | * The point of this code is to avoid permanently blocking a | |
226 | * thread that is making recursive method calls. | |
227 | */ | |
228 | if (method_node == calling_method_node) { | |
229 | if (obj_desc->method.thread_count >= obj_desc->method.concurrency) { | |
230 | return_ACPI_STATUS (AE_AML_METHOD_LIMIT); | |
231 | } | |
232 | } | |
233 | ||
234 | /* | |
235 | * Get a unit from the method semaphore. This releases the | |
236 | * interpreter if we block | |
237 | */ | |
238 | status = acpi_ex_system_wait_semaphore (obj_desc->method.semaphore, | |
239 | ACPI_WAIT_FOREVER); | |
240 | } | |
241 | ||
242 | /* | |
243 | * Increment the method parse tree thread count since it has been | |
244 | * reentered one more time (even if it is the same thread) | |
245 | */ | |
246 | obj_desc->method.thread_count++; | |
247 | return_ACPI_STATUS (status); | |
248 | } | |
249 | ||
250 | ||
251 | /******************************************************************************* | |
252 | * | |
253 | * FUNCTION: acpi_ds_call_control_method | |
254 | * | |
255 | * PARAMETERS: Thread - Info for this thread | |
256 | * this_walk_state - Current walk state | |
257 | * Op - Current Op to be walked | |
258 | * | |
259 | * RETURN: Status | |
260 | * | |
261 | * DESCRIPTION: Transfer execution to a called control method | |
262 | * | |
263 | ******************************************************************************/ | |
264 | ||
265 | acpi_status | |
266 | acpi_ds_call_control_method ( | |
267 | struct acpi_thread_state *thread, | |
268 | struct acpi_walk_state *this_walk_state, | |
269 | union acpi_parse_object *op) | |
270 | { | |
271 | acpi_status status; | |
272 | struct acpi_namespace_node *method_node; | |
f9f4601f | 273 | struct acpi_walk_state *next_walk_state = NULL; |
1da177e4 LT |
274 | union acpi_operand_object *obj_desc; |
275 | struct acpi_parameter_info info; | |
276 | u32 i; | |
277 | ||
278 | ||
279 | ACPI_FUNCTION_TRACE_PTR ("ds_call_control_method", this_walk_state); | |
280 | ||
281 | ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Execute method %p, currentstate=%p\n", | |
282 | this_walk_state->prev_op, this_walk_state)); | |
283 | ||
284 | /* | |
285 | * Get the namespace entry for the control method we are about to call | |
286 | */ | |
287 | method_node = this_walk_state->method_call_node; | |
288 | if (!method_node) { | |
289 | return_ACPI_STATUS (AE_NULL_ENTRY); | |
290 | } | |
291 | ||
292 | obj_desc = acpi_ns_get_attached_object (method_node); | |
293 | if (!obj_desc) { | |
294 | return_ACPI_STATUS (AE_NULL_OBJECT); | |
295 | } | |
296 | ||
f9f4601f RM |
297 | status = acpi_ut_allocate_owner_id (&obj_desc->method.owner_id); |
298 | if (ACPI_FAILURE (status)) { | |
299 | return_ACPI_STATUS (status); | |
300 | } | |
1da177e4 LT |
301 | |
302 | /* Init for new method, wait on concurrency semaphore */ | |
303 | ||
304 | status = acpi_ds_begin_method_execution (method_node, obj_desc, | |
305 | this_walk_state->method_node); | |
306 | if (ACPI_FAILURE (status)) { | |
f9f4601f | 307 | goto cleanup; |
1da177e4 LT |
308 | } |
309 | ||
310 | if (!(obj_desc->method.method_flags & AML_METHOD_INTERNAL_ONLY)) { | |
311 | /* 1) Parse: Create a new walk state for the preempting walk */ | |
312 | ||
f9f4601f | 313 | next_walk_state = acpi_ds_create_walk_state (obj_desc->method.owner_id, |
1da177e4 LT |
314 | op, obj_desc, NULL); |
315 | if (!next_walk_state) { | |
316 | return_ACPI_STATUS (AE_NO_MEMORY); | |
317 | } | |
318 | ||
319 | /* Create and init a Root Node */ | |
320 | ||
321 | op = acpi_ps_create_scope_op (); | |
322 | if (!op) { | |
323 | status = AE_NO_MEMORY; | |
324 | goto cleanup; | |
325 | } | |
326 | ||
327 | status = acpi_ds_init_aml_walk (next_walk_state, op, method_node, | |
328 | obj_desc->method.aml_start, obj_desc->method.aml_length, | |
329 | NULL, 1); | |
330 | if (ACPI_FAILURE (status)) { | |
331 | acpi_ds_delete_walk_state (next_walk_state); | |
332 | goto cleanup; | |
333 | } | |
334 | ||
335 | /* Begin AML parse */ | |
336 | ||
337 | status = acpi_ps_parse_aml (next_walk_state); | |
338 | acpi_ps_delete_parse_tree (op); | |
339 | } | |
340 | ||
341 | /* 2) Execute: Create a new state for the preempting walk */ | |
342 | ||
f9f4601f | 343 | next_walk_state = acpi_ds_create_walk_state (obj_desc->method.owner_id, |
1da177e4 LT |
344 | NULL, obj_desc, thread); |
345 | if (!next_walk_state) { | |
346 | status = AE_NO_MEMORY; | |
347 | goto cleanup; | |
348 | } | |
349 | /* | |
350 | * The resolved arguments were put on the previous walk state's operand | |
351 | * stack. Operands on the previous walk state stack always | |
352 | * start at index 0. | |
353 | * Null terminate the list of arguments | |
354 | */ | |
355 | this_walk_state->operands [this_walk_state->num_operands] = NULL; | |
356 | ||
357 | info.parameters = &this_walk_state->operands[0]; | |
358 | info.parameter_type = ACPI_PARAM_ARGS; | |
359 | ||
360 | status = acpi_ds_init_aml_walk (next_walk_state, NULL, method_node, | |
361 | obj_desc->method.aml_start, obj_desc->method.aml_length, | |
362 | &info, 3); | |
363 | if (ACPI_FAILURE (status)) { | |
364 | goto cleanup; | |
365 | } | |
366 | ||
367 | /* | |
368 | * Delete the operands on the previous walkstate operand stack | |
369 | * (they were copied to new objects) | |
370 | */ | |
371 | for (i = 0; i < obj_desc->method.param_count; i++) { | |
372 | acpi_ut_remove_reference (this_walk_state->operands [i]); | |
373 | this_walk_state->operands [i] = NULL; | |
374 | } | |
375 | ||
376 | /* Clear the operand stack */ | |
377 | ||
378 | this_walk_state->num_operands = 0; | |
379 | ||
380 | ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, | |
381 | "Starting nested execution, newstate=%p\n", next_walk_state)); | |
382 | ||
383 | if (obj_desc->method.method_flags & AML_METHOD_INTERNAL_ONLY) { | |
384 | status = obj_desc->method.implementation (next_walk_state); | |
385 | return_ACPI_STATUS (status); | |
386 | } | |
387 | ||
388 | return_ACPI_STATUS (AE_OK); | |
389 | ||
390 | ||
391 | /* On error, we must delete the new walk state */ | |
392 | ||
393 | cleanup: | |
f9f4601f | 394 | (void) acpi_ut_release_owner_id (obj_desc->method.owner_id); |
1da177e4 LT |
395 | if (next_walk_state && (next_walk_state->method_desc)) { |
396 | /* Decrement the thread count on the method parse tree */ | |
397 | ||
398 | next_walk_state->method_desc->method.thread_count--; | |
399 | } | |
400 | (void) acpi_ds_terminate_control_method (next_walk_state); | |
401 | acpi_ds_delete_walk_state (next_walk_state); | |
402 | return_ACPI_STATUS (status); | |
403 | } | |
404 | ||
405 | ||
406 | /******************************************************************************* | |
407 | * | |
408 | * FUNCTION: acpi_ds_restart_control_method | |
409 | * | |
410 | * PARAMETERS: walk_state - State for preempted method (caller) | |
411 | * return_desc - Return value from the called method | |
412 | * | |
413 | * RETURN: Status | |
414 | * | |
415 | * DESCRIPTION: Restart a method that was preempted by another (nested) method | |
416 | * invocation. Handle the return value (if any) from the callee. | |
417 | * | |
418 | ******************************************************************************/ | |
419 | ||
420 | acpi_status | |
421 | acpi_ds_restart_control_method ( | |
422 | struct acpi_walk_state *walk_state, | |
423 | union acpi_operand_object *return_desc) | |
424 | { | |
425 | acpi_status status; | |
426 | ||
427 | ||
428 | ACPI_FUNCTION_TRACE_PTR ("ds_restart_control_method", walk_state); | |
429 | ||
430 | ||
431 | ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, | |
432 | "****Restart [%4.4s] Op %p return_value_from_callee %p\n", | |
433 | (char *) &walk_state->method_node->name, walk_state->method_call_op, | |
434 | return_desc)); | |
435 | ||
436 | ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, | |
437 | " return_from_this_method_used?=%X res_stack %p Walk %p\n", | |
438 | walk_state->return_used, | |
439 | walk_state->results, walk_state)); | |
440 | ||
441 | /* Did the called method return a value? */ | |
442 | ||
443 | if (return_desc) { | |
444 | /* Are we actually going to use the return value? */ | |
445 | ||
446 | if (walk_state->return_used) { | |
447 | /* Save the return value from the previous method */ | |
448 | ||
449 | status = acpi_ds_result_push (return_desc, walk_state); | |
450 | if (ACPI_FAILURE (status)) { | |
451 | acpi_ut_remove_reference (return_desc); | |
452 | return_ACPI_STATUS (status); | |
453 | } | |
454 | ||
455 | /* | |
456 | * Save as THIS method's return value in case it is returned | |
457 | * immediately to yet another method | |
458 | */ | |
459 | walk_state->return_desc = return_desc; | |
460 | } | |
461 | ||
462 | /* | |
463 | * The following code is the | |
464 | * optional support for a so-called "implicit return". Some AML code | |
465 | * assumes that the last value of the method is "implicitly" returned | |
466 | * to the caller. Just save the last result as the return value. | |
467 | * NOTE: this is optional because the ASL language does not actually | |
468 | * support this behavior. | |
469 | */ | |
470 | else if (!acpi_ds_do_implicit_return (return_desc, walk_state, FALSE)) { | |
471 | /* | |
472 | * Delete the return value if it will not be used by the | |
473 | * calling method | |
474 | */ | |
475 | acpi_ut_remove_reference (return_desc); | |
476 | } | |
477 | } | |
478 | ||
479 | return_ACPI_STATUS (AE_OK); | |
480 | } | |
481 | ||
482 | ||
483 | /******************************************************************************* | |
484 | * | |
485 | * FUNCTION: acpi_ds_terminate_control_method | |
486 | * | |
487 | * PARAMETERS: walk_state - State of the method | |
488 | * | |
489 | * RETURN: Status | |
490 | * | |
491 | * DESCRIPTION: Terminate a control method. Delete everything that the method | |
492 | * created, delete all locals and arguments, and delete the parse | |
493 | * tree if requested. | |
494 | * | |
495 | ******************************************************************************/ | |
496 | ||
497 | acpi_status | |
498 | acpi_ds_terminate_control_method ( | |
499 | struct acpi_walk_state *walk_state) | |
500 | { | |
501 | union acpi_operand_object *obj_desc; | |
502 | struct acpi_namespace_node *method_node; | |
503 | acpi_status status; | |
504 | ||
505 | ||
506 | ACPI_FUNCTION_TRACE_PTR ("ds_terminate_control_method", walk_state); | |
507 | ||
508 | ||
509 | if (!walk_state) { | |
510 | return (AE_BAD_PARAMETER); | |
511 | } | |
512 | ||
513 | /* The current method object was saved in the walk state */ | |
514 | ||
515 | obj_desc = walk_state->method_desc; | |
516 | if (!obj_desc) { | |
517 | return_ACPI_STATUS (AE_OK); | |
518 | } | |
519 | ||
520 | /* Delete all arguments and locals */ | |
521 | ||
522 | acpi_ds_method_data_delete_all (walk_state); | |
523 | ||
524 | /* | |
525 | * Lock the parser while we terminate this method. | |
526 | * If this is the last thread executing the method, | |
527 | * we have additional cleanup to perform | |
528 | */ | |
529 | status = acpi_ut_acquire_mutex (ACPI_MTX_PARSER); | |
530 | if (ACPI_FAILURE (status)) { | |
531 | return_ACPI_STATUS (status); | |
532 | } | |
533 | ||
534 | /* Signal completion of the execution of this method if necessary */ | |
535 | ||
536 | if (walk_state->method_desc->method.semaphore) { | |
537 | status = acpi_os_signal_semaphore ( | |
538 | walk_state->method_desc->method.semaphore, 1); | |
539 | if (ACPI_FAILURE (status)) { | |
540 | ACPI_REPORT_ERROR (("Could not signal method semaphore\n")); | |
541 | status = AE_OK; | |
542 | ||
543 | /* Ignore error and continue cleanup */ | |
544 | } | |
545 | } | |
546 | ||
547 | if (walk_state->method_desc->method.thread_count) { | |
548 | ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, | |
549 | "*** Not deleting method namespace, there are still %d threads\n", | |
550 | walk_state->method_desc->method.thread_count)); | |
551 | } | |
552 | ||
553 | if (!walk_state->method_desc->method.thread_count) { | |
554 | /* | |
555 | * Support to dynamically change a method from not_serialized to | |
556 | * Serialized if it appears that the method is written foolishly and | |
557 | * does not support multiple thread execution. The best example of this | |
558 | * is if such a method creates namespace objects and blocks. A second | |
559 | * thread will fail with an AE_ALREADY_EXISTS exception | |
560 | * | |
561 | * This code is here because we must wait until the last thread exits | |
562 | * before creating the synchronization semaphore. | |
563 | */ | |
564 | if ((walk_state->method_desc->method.concurrency == 1) && | |
565 | (!walk_state->method_desc->method.semaphore)) { | |
566 | status = acpi_os_create_semaphore (1, | |
567 | 1, | |
568 | &walk_state->method_desc->method.semaphore); | |
569 | } | |
570 | ||
571 | /* | |
572 | * There are no more threads executing this method. Perform | |
573 | * additional cleanup. | |
574 | * | |
575 | * The method Node is stored in the walk state | |
576 | */ | |
577 | method_node = walk_state->method_node; | |
578 | ||
579 | /* | |
580 | * Delete any namespace entries created immediately underneath | |
581 | * the method | |
582 | */ | |
583 | status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE); | |
584 | if (ACPI_FAILURE (status)) { | |
585 | return_ACPI_STATUS (status); | |
586 | } | |
587 | ||
588 | if (method_node->child) { | |
589 | acpi_ns_delete_namespace_subtree (method_node); | |
590 | } | |
591 | ||
592 | /* | |
593 | * Delete any namespace entries created anywhere else within | |
594 | * the namespace | |
595 | */ | |
f9f4601f | 596 | acpi_ns_delete_namespace_by_owner (walk_state->method_desc->method.owner_id); |
1da177e4 LT |
597 | status = acpi_ut_release_mutex (ACPI_MTX_NAMESPACE); |
598 | if (ACPI_FAILURE (status)) { | |
599 | return_ACPI_STATUS (status); | |
600 | } | |
601 | } | |
602 | ||
603 | status = acpi_ut_release_mutex (ACPI_MTX_PARSER); | |
604 | return_ACPI_STATUS (status); | |
605 | } | |
606 | ||
607 |