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