Revert "ARM: tegra: tegratab: dummy change"
[linux-2.6.git] / drivers / acpi / acpica / nsutils.c
1 /******************************************************************************
2  *
3  * Module Name: nsutils - Utilities for accessing ACPI namespace, accessing
4  *                        parents and siblings and Scope manipulation
5  *
6  *****************************************************************************/
7
8 /*
9  * Copyright (C) 2000 - 2012, Intel Corp.
10  * All rights reserved.
11  *
12  * Redistribution and use in source and binary forms, with or without
13  * modification, are permitted provided that the following conditions
14  * are met:
15  * 1. Redistributions of source code must retain the above copyright
16  *    notice, this list of conditions, and the following disclaimer,
17  *    without modification.
18  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
19  *    substantially similar to the "NO WARRANTY" disclaimer below
20  *    ("Disclaimer") and any redistribution must be conditioned upon
21  *    including a substantially similar Disclaimer requirement for further
22  *    binary redistribution.
23  * 3. Neither the names of the above-listed copyright holders nor the names
24  *    of any contributors may be used to endorse or promote products derived
25  *    from this software without specific prior written permission.
26  *
27  * Alternatively, this software may be distributed under the terms of the
28  * GNU General Public License ("GPL") version 2 as published by the Free
29  * Software Foundation.
30  *
31  * NO WARRANTY
32  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
33  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
34  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
35  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
36  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
40  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
41  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
42  * POSSIBILITY OF SUCH DAMAGES.
43  */
44
45 #include <acpi/acpi.h>
46 #include "accommon.h"
47 #include "acnamesp.h"
48 #include "amlcode.h"
49 #include "actables.h"
50
51 #define _COMPONENT          ACPI_NAMESPACE
52 ACPI_MODULE_NAME("nsutils")
53
54 /* Local prototypes */
55 static u8 acpi_ns_valid_path_separator(char sep);
56
57 #ifdef ACPI_OBSOLETE_FUNCTIONS
58 acpi_name acpi_ns_find_parent_name(struct acpi_namespace_node *node_to_search);
59 #endif
60
61 /*******************************************************************************
62  *
63  * FUNCTION:    acpi_ns_print_node_pathname
64  *
65  * PARAMETERS:  Node            - Object
66  *              Message         - Prefix message
67  *
68  * DESCRIPTION: Print an object's full namespace pathname
69  *              Manages allocation/freeing of a pathname buffer
70  *
71  ******************************************************************************/
72
73 void
74 acpi_ns_print_node_pathname(struct acpi_namespace_node *node,
75                             const char *message)
76 {
77         struct acpi_buffer buffer;
78         acpi_status status;
79
80         if (!node) {
81                 acpi_os_printf("[NULL NAME]");
82                 return;
83         }
84
85         /* Convert handle to full pathname and print it (with supplied message) */
86
87         buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER;
88
89         status = acpi_ns_handle_to_pathname(node, &buffer);
90         if (ACPI_SUCCESS(status)) {
91                 if (message) {
92                         acpi_os_printf("%s ", message);
93                 }
94
95                 acpi_os_printf("[%s] (Node %p)", (char *)buffer.pointer, node);
96                 ACPI_FREE(buffer.pointer);
97         }
98 }
99
100 /*******************************************************************************
101  *
102  * FUNCTION:    acpi_ns_valid_root_prefix
103  *
104  * PARAMETERS:  Prefix          - Character to be checked
105  *
106  * RETURN:      TRUE if a valid prefix
107  *
108  * DESCRIPTION: Check if a character is a valid ACPI Root prefix
109  *
110  ******************************************************************************/
111
112 u8 acpi_ns_valid_root_prefix(char prefix)
113 {
114
115         return ((u8) (prefix == '\\'));
116 }
117
118 /*******************************************************************************
119  *
120  * FUNCTION:    acpi_ns_valid_path_separator
121  *
122  * PARAMETERS:  Sep         - Character to be checked
123  *
124  * RETURN:      TRUE if a valid path separator
125  *
126  * DESCRIPTION: Check if a character is a valid ACPI path separator
127  *
128  ******************************************************************************/
129
130 static u8 acpi_ns_valid_path_separator(char sep)
131 {
132
133         return ((u8) (sep == '.'));
134 }
135
136 /*******************************************************************************
137  *
138  * FUNCTION:    acpi_ns_get_type
139  *
140  * PARAMETERS:  Node        - Parent Node to be examined
141  *
142  * RETURN:      Type field from Node whose handle is passed
143  *
144  * DESCRIPTION: Return the type of a Namespace node
145  *
146  ******************************************************************************/
147
148 acpi_object_type acpi_ns_get_type(struct acpi_namespace_node * node)
149 {
150         ACPI_FUNCTION_TRACE(ns_get_type);
151
152         if (!node) {
153                 ACPI_WARNING((AE_INFO, "Null Node parameter"));
154                 return_UINT32(ACPI_TYPE_ANY);
155         }
156
157         return_UINT32((acpi_object_type) node->type);
158 }
159
160 /*******************************************************************************
161  *
162  * FUNCTION:    acpi_ns_local
163  *
164  * PARAMETERS:  Type        - A namespace object type
165  *
166  * RETURN:      LOCAL if names must be found locally in objects of the
167  *              passed type, 0 if enclosing scopes should be searched
168  *
169  * DESCRIPTION: Returns scope rule for the given object type.
170  *
171  ******************************************************************************/
172
173 u32 acpi_ns_local(acpi_object_type type)
174 {
175         ACPI_FUNCTION_TRACE(ns_local);
176
177         if (!acpi_ut_valid_object_type(type)) {
178
179                 /* Type code out of range  */
180
181                 ACPI_WARNING((AE_INFO, "Invalid Object Type 0x%X", type));
182                 return_UINT32(ACPI_NS_NORMAL);
183         }
184
185         return_UINT32((u32) acpi_gbl_ns_properties[type] & ACPI_NS_LOCAL);
186 }
187
188 /*******************************************************************************
189  *
190  * FUNCTION:    acpi_ns_get_internal_name_length
191  *
192  * PARAMETERS:  Info            - Info struct initialized with the
193  *                                external name pointer.
194  *
195  * RETURN:      None
196  *
197  * DESCRIPTION: Calculate the length of the internal (AML) namestring
198  *              corresponding to the external (ASL) namestring.
199  *
200  ******************************************************************************/
201
202 void acpi_ns_get_internal_name_length(struct acpi_namestring_info *info)
203 {
204         const char *next_external_char;
205         u32 i;
206
207         ACPI_FUNCTION_ENTRY();
208
209         next_external_char = info->external_name;
210         info->num_carats = 0;
211         info->num_segments = 0;
212         info->fully_qualified = FALSE;
213
214         /*
215          * For the internal name, the required length is 4 bytes per segment, plus
216          * 1 each for root_prefix, multi_name_prefix_op, segment count, trailing null
217          * (which is not really needed, but no there's harm in putting it there)
218          *
219          * strlen() + 1 covers the first name_seg, which has no path separator
220          */
221         if (acpi_ns_valid_root_prefix(*next_external_char)) {
222                 info->fully_qualified = TRUE;
223                 next_external_char++;
224
225                 /* Skip redundant root_prefix, like \\_SB.PCI0.SBRG.EC0 */
226
227                 while (acpi_ns_valid_root_prefix(*next_external_char)) {
228                         next_external_char++;
229                 }
230         } else {
231                 /* Handle Carat prefixes */
232
233                 while (*next_external_char == '^') {
234                         info->num_carats++;
235                         next_external_char++;
236                 }
237         }
238
239         /*
240          * Determine the number of ACPI name "segments" by counting the number of
241          * path separators within the string. Start with one segment since the
242          * segment count is [(# separators) + 1], and zero separators is ok.
243          */
244         if (*next_external_char) {
245                 info->num_segments = 1;
246                 for (i = 0; next_external_char[i]; i++) {
247                         if (acpi_ns_valid_path_separator(next_external_char[i])) {
248                                 info->num_segments++;
249                         }
250                 }
251         }
252
253         info->length = (ACPI_NAME_SIZE * info->num_segments) +
254             4 + info->num_carats;
255
256         info->next_external_char = next_external_char;
257 }
258
259 /*******************************************************************************
260  *
261  * FUNCTION:    acpi_ns_build_internal_name
262  *
263  * PARAMETERS:  Info            - Info struct fully initialized
264  *
265  * RETURN:      Status
266  *
267  * DESCRIPTION: Construct the internal (AML) namestring
268  *              corresponding to the external (ASL) namestring.
269  *
270  ******************************************************************************/
271
272 acpi_status acpi_ns_build_internal_name(struct acpi_namestring_info *info)
273 {
274         u32 num_segments = info->num_segments;
275         char *internal_name = info->internal_name;
276         const char *external_name = info->next_external_char;
277         char *result = NULL;
278         u32 i;
279
280         ACPI_FUNCTION_TRACE(ns_build_internal_name);
281
282         /* Setup the correct prefixes, counts, and pointers */
283
284         if (info->fully_qualified) {
285                 internal_name[0] = '\\';
286
287                 if (num_segments <= 1) {
288                         result = &internal_name[1];
289                 } else if (num_segments == 2) {
290                         internal_name[1] = AML_DUAL_NAME_PREFIX;
291                         result = &internal_name[2];
292                 } else {
293                         internal_name[1] = AML_MULTI_NAME_PREFIX_OP;
294                         internal_name[2] = (char)num_segments;
295                         result = &internal_name[3];
296                 }
297         } else {
298                 /*
299                  * Not fully qualified.
300                  * Handle Carats first, then append the name segments
301                  */
302                 i = 0;
303                 if (info->num_carats) {
304                         for (i = 0; i < info->num_carats; i++) {
305                                 internal_name[i] = '^';
306                         }
307                 }
308
309                 if (num_segments <= 1) {
310                         result = &internal_name[i];
311                 } else if (num_segments == 2) {
312                         internal_name[i] = AML_DUAL_NAME_PREFIX;
313                         result = &internal_name[(acpi_size) i + 1];
314                 } else {
315                         internal_name[i] = AML_MULTI_NAME_PREFIX_OP;
316                         internal_name[(acpi_size) i + 1] = (char)num_segments;
317                         result = &internal_name[(acpi_size) i + 2];
318                 }
319         }
320
321         /* Build the name (minus path separators) */
322
323         for (; num_segments; num_segments--) {
324                 for (i = 0; i < ACPI_NAME_SIZE; i++) {
325                         if (acpi_ns_valid_path_separator(*external_name) ||
326                             (*external_name == 0)) {
327
328                                 /* Pad the segment with underscore(s) if segment is short */
329
330                                 result[i] = '_';
331                         } else {
332                                 /* Convert the character to uppercase and save it */
333
334                                 result[i] =
335                                     (char)ACPI_TOUPPER((int)*external_name);
336                                 external_name++;
337                         }
338                 }
339
340                 /* Now we must have a path separator, or the pathname is bad */
341
342                 if (!acpi_ns_valid_path_separator(*external_name) &&
343                     (*external_name != 0)) {
344                         return_ACPI_STATUS(AE_BAD_PATHNAME);
345                 }
346
347                 /* Move on the next segment */
348
349                 external_name++;
350                 result += ACPI_NAME_SIZE;
351         }
352
353         /* Terminate the string */
354
355         *result = 0;
356
357         if (info->fully_qualified) {
358                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
359                                   "Returning [%p] (abs) \"\\%s\"\n",
360                                   internal_name, internal_name));
361         } else {
362                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Returning [%p] (rel) \"%s\"\n",
363                                   internal_name, internal_name));
364         }
365
366         return_ACPI_STATUS(AE_OK);
367 }
368
369 /*******************************************************************************
370  *
371  * FUNCTION:    acpi_ns_internalize_name
372  *
373  * PARAMETERS:  *external_name          - External representation of name
374  *              **Converted Name        - Where to return the resulting
375  *                                        internal represention of the name
376  *
377  * RETURN:      Status
378  *
379  * DESCRIPTION: Convert an external representation (e.g. "\_PR_.CPU0")
380  *              to internal form (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30)
381  *
382  *******************************************************************************/
383
384 acpi_status
385 acpi_ns_internalize_name(const char *external_name, char **converted_name)
386 {
387         char *internal_name;
388         struct acpi_namestring_info info;
389         acpi_status status;
390
391         ACPI_FUNCTION_TRACE(ns_internalize_name);
392
393         if ((!external_name) || (*external_name == 0) || (!converted_name)) {
394                 return_ACPI_STATUS(AE_BAD_PARAMETER);
395         }
396
397         /* Get the length of the new internal name */
398
399         info.external_name = external_name;
400         acpi_ns_get_internal_name_length(&info);
401
402         /* We need a segment to store the internal  name */
403
404         internal_name = ACPI_ALLOCATE_ZEROED(info.length);
405         if (!internal_name) {
406                 return_ACPI_STATUS(AE_NO_MEMORY);
407         }
408
409         /* Build the name */
410
411         info.internal_name = internal_name;
412         status = acpi_ns_build_internal_name(&info);
413         if (ACPI_FAILURE(status)) {
414                 ACPI_FREE(internal_name);
415                 return_ACPI_STATUS(status);
416         }
417
418         *converted_name = internal_name;
419         return_ACPI_STATUS(AE_OK);
420 }
421
422 /*******************************************************************************
423  *
424  * FUNCTION:    acpi_ns_externalize_name
425  *
426  * PARAMETERS:  internal_name_length - Lenth of the internal name below
427  *              internal_name       - Internal representation of name
428  *              converted_name_length - Where the length is returned
429  *              converted_name      - Where the resulting external name
430  *                                    is returned
431  *
432  * RETURN:      Status
433  *
434  * DESCRIPTION: Convert internal name (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30)
435  *              to its external (printable) form (e.g. "\_PR_.CPU0")
436  *
437  ******************************************************************************/
438
439 acpi_status
440 acpi_ns_externalize_name(u32 internal_name_length,
441                          const char *internal_name,
442                          u32 * converted_name_length, char **converted_name)
443 {
444         u32 names_index = 0;
445         u32 num_segments = 0;
446         u32 required_length;
447         u32 prefix_length = 0;
448         u32 i = 0;
449         u32 j = 0;
450
451         ACPI_FUNCTION_TRACE(ns_externalize_name);
452
453         if (!internal_name_length || !internal_name || !converted_name) {
454                 return_ACPI_STATUS(AE_BAD_PARAMETER);
455         }
456
457         /* Check for a prefix (one '\' | one or more '^') */
458
459         switch (internal_name[0]) {
460         case '\\':
461                 prefix_length = 1;
462                 break;
463
464         case '^':
465                 for (i = 0; i < internal_name_length; i++) {
466                         if (internal_name[i] == '^') {
467                                 prefix_length = i + 1;
468                         } else {
469                                 break;
470                         }
471                 }
472
473                 if (i == internal_name_length) {
474                         prefix_length = i;
475                 }
476
477                 break;
478
479         default:
480                 break;
481         }
482
483         /*
484          * Check for object names. Note that there could be 0-255 of these
485          * 4-byte elements.
486          */
487         if (prefix_length < internal_name_length) {
488                 switch (internal_name[prefix_length]) {
489                 case AML_MULTI_NAME_PREFIX_OP:
490
491                         /* <count> 4-byte names */
492
493                         names_index = prefix_length + 2;
494                         num_segments = (u8)
495                             internal_name[(acpi_size) prefix_length + 1];
496                         break;
497
498                 case AML_DUAL_NAME_PREFIX:
499
500                         /* Two 4-byte names */
501
502                         names_index = prefix_length + 1;
503                         num_segments = 2;
504                         break;
505
506                 case 0:
507
508                         /* null_name */
509
510                         names_index = 0;
511                         num_segments = 0;
512                         break;
513
514                 default:
515
516                         /* one 4-byte name */
517
518                         names_index = prefix_length;
519                         num_segments = 1;
520                         break;
521                 }
522         }
523
524         /*
525          * Calculate the length of converted_name, which equals the length
526          * of the prefix, length of all object names, length of any required
527          * punctuation ('.') between object names, plus the NULL terminator.
528          */
529         required_length = prefix_length + (4 * num_segments) +
530             ((num_segments > 0) ? (num_segments - 1) : 0) + 1;
531
532         /*
533          * Check to see if we're still in bounds.  If not, there's a problem
534          * with internal_name (invalid format).
535          */
536         if (required_length > internal_name_length) {
537                 ACPI_ERROR((AE_INFO, "Invalid internal name"));
538                 return_ACPI_STATUS(AE_BAD_PATHNAME);
539         }
540
541         /* Build the converted_name */
542
543         *converted_name = ACPI_ALLOCATE_ZEROED(required_length);
544         if (!(*converted_name)) {
545                 return_ACPI_STATUS(AE_NO_MEMORY);
546         }
547
548         j = 0;
549
550         for (i = 0; i < prefix_length; i++) {
551                 (*converted_name)[j++] = internal_name[i];
552         }
553
554         if (num_segments > 0) {
555                 for (i = 0; i < num_segments; i++) {
556                         if (i > 0) {
557                                 (*converted_name)[j++] = '.';
558                         }
559
560                         (*converted_name)[j++] = internal_name[names_index++];
561                         (*converted_name)[j++] = internal_name[names_index++];
562                         (*converted_name)[j++] = internal_name[names_index++];
563                         (*converted_name)[j++] = internal_name[names_index++];
564                 }
565         }
566
567         if (converted_name_length) {
568                 *converted_name_length = (u32) required_length;
569         }
570
571         return_ACPI_STATUS(AE_OK);
572 }
573
574 /*******************************************************************************
575  *
576  * FUNCTION:    acpi_ns_validate_handle
577  *
578  * PARAMETERS:  Handle          - Handle to be validated and typecast to a
579  *                                namespace node.
580  *
581  * RETURN:      A pointer to a namespace node
582  *
583  * DESCRIPTION: Convert a namespace handle to a namespace node. Handles special
584  *              cases for the root node.
585  *
586  * NOTE: Real integer handles would allow for more verification
587  *       and keep all pointers within this subsystem - however this introduces
588  *       more overhead and has not been necessary to this point. Drivers
589  *       holding handles are typically notified before a node becomes invalid
590  *       due to a table unload.
591  *
592  ******************************************************************************/
593
594 struct acpi_namespace_node *acpi_ns_validate_handle(acpi_handle handle)
595 {
596
597         ACPI_FUNCTION_ENTRY();
598
599         /* Parameter validation */
600
601         if ((!handle) || (handle == ACPI_ROOT_OBJECT)) {
602                 return (acpi_gbl_root_node);
603         }
604
605         /* We can at least attempt to verify the handle */
606
607         if (ACPI_GET_DESCRIPTOR_TYPE(handle) != ACPI_DESC_TYPE_NAMED) {
608                 return (NULL);
609         }
610
611         return (ACPI_CAST_PTR(struct acpi_namespace_node, handle));
612 }
613
614 /*******************************************************************************
615  *
616  * FUNCTION:    acpi_ns_terminate
617  *
618  * PARAMETERS:  none
619  *
620  * RETURN:      none
621  *
622  * DESCRIPTION: free memory allocated for namespace and ACPI table storage.
623  *
624  ******************************************************************************/
625
626 void acpi_ns_terminate(void)
627 {
628         union acpi_operand_object *obj_desc;
629
630         ACPI_FUNCTION_TRACE(ns_terminate);
631
632         /*
633          * 1) Free the entire namespace -- all nodes and objects
634          *
635          * Delete all object descriptors attached to namepsace nodes
636          */
637         acpi_ns_delete_namespace_subtree(acpi_gbl_root_node);
638
639         /* Detach any objects attached to the root */
640
641         obj_desc = acpi_ns_get_attached_object(acpi_gbl_root_node);
642         if (obj_desc) {
643                 acpi_ns_detach_object(acpi_gbl_root_node);
644         }
645
646         ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Namespace freed\n"));
647         return_VOID;
648 }
649
650 /*******************************************************************************
651  *
652  * FUNCTION:    acpi_ns_opens_scope
653  *
654  * PARAMETERS:  Type        - A valid namespace type
655  *
656  * RETURN:      NEWSCOPE if the passed type "opens a name scope" according
657  *              to the ACPI specification, else 0
658  *
659  ******************************************************************************/
660
661 u32 acpi_ns_opens_scope(acpi_object_type type)
662 {
663         ACPI_FUNCTION_TRACE_STR(ns_opens_scope, acpi_ut_get_type_name(type));
664
665         if (!acpi_ut_valid_object_type(type)) {
666
667                 /* type code out of range  */
668
669                 ACPI_WARNING((AE_INFO, "Invalid Object Type 0x%X", type));
670                 return_UINT32(ACPI_NS_NORMAL);
671         }
672
673         return_UINT32(((u32) acpi_gbl_ns_properties[type]) & ACPI_NS_NEWSCOPE);
674 }
675
676 /*******************************************************************************
677  *
678  * FUNCTION:    acpi_ns_get_node
679  *
680  * PARAMETERS:  *Pathname   - Name to be found, in external (ASL) format. The
681  *                            \ (backslash) and ^ (carat) prefixes, and the
682  *                            . (period) to separate segments are supported.
683  *              prefix_node  - Root of subtree to be searched, or NS_ALL for the
684  *                            root of the name space.  If Name is fully
685  *                            qualified (first s8 is '\'), the passed value
686  *                            of Scope will not be accessed.
687  *              Flags       - Used to indicate whether to perform upsearch or
688  *                            not.
689  *              return_node - Where the Node is returned
690  *
691  * DESCRIPTION: Look up a name relative to a given scope and return the
692  *              corresponding Node.  NOTE: Scope can be null.
693  *
694  * MUTEX:       Locks namespace
695  *
696  ******************************************************************************/
697
698 acpi_status
699 acpi_ns_get_node(struct acpi_namespace_node *prefix_node,
700                  const char *pathname,
701                  u32 flags, struct acpi_namespace_node **return_node)
702 {
703         union acpi_generic_state scope_info;
704         acpi_status status;
705         char *internal_path;
706
707         ACPI_FUNCTION_TRACE_PTR(ns_get_node, ACPI_CAST_PTR(char, pathname));
708
709         if (!pathname) {
710                 *return_node = prefix_node;
711                 if (!prefix_node) {
712                         *return_node = acpi_gbl_root_node;
713                 }
714                 return_ACPI_STATUS(AE_OK);
715         }
716
717         /* Convert path to internal representation */
718
719         status = acpi_ns_internalize_name(pathname, &internal_path);
720         if (ACPI_FAILURE(status)) {
721                 return_ACPI_STATUS(status);
722         }
723
724         /* Must lock namespace during lookup */
725
726         status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
727         if (ACPI_FAILURE(status)) {
728                 goto cleanup;
729         }
730
731         /* Setup lookup scope (search starting point) */
732
733         scope_info.scope.node = prefix_node;
734
735         /* Lookup the name in the namespace */
736
737         status = acpi_ns_lookup(&scope_info, internal_path, ACPI_TYPE_ANY,
738                                 ACPI_IMODE_EXECUTE,
739                                 (flags | ACPI_NS_DONT_OPEN_SCOPE), NULL,
740                                 return_node);
741         if (ACPI_FAILURE(status)) {
742                 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "%s, %s\n",
743                                   pathname, acpi_format_exception(status)));
744         }
745
746         (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
747
748       cleanup:
749         ACPI_FREE(internal_path);
750         return_ACPI_STATUS(status);
751 }