Merge tag 'phy-fixes-5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/phy/linux...
[linux-2.6-microblaze.git] / drivers / acpi / acpica / dsopcode.c
1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
2 /******************************************************************************
3  *
4  * Module Name: dsopcode - Dispatcher support for regions and fields
5  *
6  * Copyright (C) 2000 - 2021, Intel Corp.
7  *
8  *****************************************************************************/
9
10 #include <acpi/acpi.h>
11 #include "accommon.h"
12 #include "acparser.h"
13 #include "amlcode.h"
14 #include "acdispat.h"
15 #include "acinterp.h"
16 #include "acnamesp.h"
17 #include "acevents.h"
18 #include "actables.h"
19
20 #define _COMPONENT          ACPI_DISPATCHER
21 ACPI_MODULE_NAME("dsopcode")
22
23 /* Local prototypes */
24 static acpi_status
25 acpi_ds_init_buffer_field(u16 aml_opcode,
26                           union acpi_operand_object *obj_desc,
27                           union acpi_operand_object *buffer_desc,
28                           union acpi_operand_object *offset_desc,
29                           union acpi_operand_object *length_desc,
30                           union acpi_operand_object *result_desc);
31
32 /*******************************************************************************
33  *
34  * FUNCTION:    acpi_ds_initialize_region
35  *
36  * PARAMETERS:  obj_handle      - Region namespace node
37  *
38  * RETURN:      Status
39  *
40  * DESCRIPTION: Front end to ev_initialize_region
41  *
42  ******************************************************************************/
43
44 acpi_status acpi_ds_initialize_region(acpi_handle obj_handle)
45 {
46         union acpi_operand_object *obj_desc;
47         acpi_status status;
48
49         obj_desc = acpi_ns_get_attached_object(obj_handle);
50
51         /* Namespace is NOT locked */
52
53         status = acpi_ev_initialize_region(obj_desc);
54         return (status);
55 }
56
57 /*******************************************************************************
58  *
59  * FUNCTION:    acpi_ds_init_buffer_field
60  *
61  * PARAMETERS:  aml_opcode      - create_xxx_field
62  *              obj_desc        - buffer_field object
63  *              buffer_desc     - Host Buffer
64  *              offset_desc     - Offset into buffer
65  *              length_desc     - Length of field (CREATE_FIELD_OP only)
66  *              result_desc     - Where to store the result
67  *
68  * RETURN:      Status
69  *
70  * DESCRIPTION: Perform actual initialization of a buffer field
71  *
72  ******************************************************************************/
73
74 static acpi_status
75 acpi_ds_init_buffer_field(u16 aml_opcode,
76                           union acpi_operand_object *obj_desc,
77                           union acpi_operand_object *buffer_desc,
78                           union acpi_operand_object *offset_desc,
79                           union acpi_operand_object *length_desc,
80                           union acpi_operand_object *result_desc)
81 {
82         u32 offset;
83         u32 bit_offset;
84         u32 bit_count;
85         u8 field_flags;
86         acpi_status status;
87
88         ACPI_FUNCTION_TRACE_PTR(ds_init_buffer_field, obj_desc);
89
90         /* Host object must be a Buffer */
91
92         if (buffer_desc->common.type != ACPI_TYPE_BUFFER) {
93                 ACPI_ERROR((AE_INFO,
94                             "Target of Create Field is not a Buffer object - %s",
95                             acpi_ut_get_object_type_name(buffer_desc)));
96
97                 status = AE_AML_OPERAND_TYPE;
98                 goto cleanup;
99         }
100
101         /*
102          * The last parameter to all of these opcodes (result_desc) started
103          * out as a name_string, and should therefore now be a NS node
104          * after resolution in acpi_ex_resolve_operands().
105          */
106         if (ACPI_GET_DESCRIPTOR_TYPE(result_desc) != ACPI_DESC_TYPE_NAMED) {
107                 ACPI_ERROR((AE_INFO,
108                             "(%s) destination not a NS Node [%s]",
109                             acpi_ps_get_opcode_name(aml_opcode),
110                             acpi_ut_get_descriptor_name(result_desc)));
111
112                 status = AE_AML_OPERAND_TYPE;
113                 goto cleanup;
114         }
115
116         offset = (u32) offset_desc->integer.value;
117
118         /*
119          * Setup the Bit offsets and counts, according to the opcode
120          */
121         switch (aml_opcode) {
122         case AML_CREATE_FIELD_OP:
123
124                 /* Offset is in bits, count is in bits */
125
126                 field_flags = AML_FIELD_ACCESS_BYTE;
127                 bit_offset = offset;
128                 bit_count = (u32) length_desc->integer.value;
129
130                 /* Must have a valid (>0) bit count */
131
132                 if (bit_count == 0) {
133                         ACPI_BIOS_ERROR((AE_INFO,
134                                          "Attempt to CreateField of length zero"));
135                         status = AE_AML_OPERAND_VALUE;
136                         goto cleanup;
137                 }
138                 break;
139
140         case AML_CREATE_BIT_FIELD_OP:
141
142                 /* Offset is in bits, Field is one bit */
143
144                 bit_offset = offset;
145                 bit_count = 1;
146                 field_flags = AML_FIELD_ACCESS_BYTE;
147                 break;
148
149         case AML_CREATE_BYTE_FIELD_OP:
150
151                 /* Offset is in bytes, field is one byte */
152
153                 bit_offset = 8 * offset;
154                 bit_count = 8;
155                 field_flags = AML_FIELD_ACCESS_BYTE;
156                 break;
157
158         case AML_CREATE_WORD_FIELD_OP:
159
160                 /* Offset is in bytes, field is one word */
161
162                 bit_offset = 8 * offset;
163                 bit_count = 16;
164                 field_flags = AML_FIELD_ACCESS_WORD;
165                 break;
166
167         case AML_CREATE_DWORD_FIELD_OP:
168
169                 /* Offset is in bytes, field is one dword */
170
171                 bit_offset = 8 * offset;
172                 bit_count = 32;
173                 field_flags = AML_FIELD_ACCESS_DWORD;
174                 break;
175
176         case AML_CREATE_QWORD_FIELD_OP:
177
178                 /* Offset is in bytes, field is one qword */
179
180                 bit_offset = 8 * offset;
181                 bit_count = 64;
182                 field_flags = AML_FIELD_ACCESS_QWORD;
183                 break;
184
185         default:
186
187                 ACPI_ERROR((AE_INFO,
188                             "Unknown field creation opcode 0x%02X",
189                             aml_opcode));
190                 status = AE_AML_BAD_OPCODE;
191                 goto cleanup;
192         }
193
194         /* Entire field must fit within the current length of the buffer */
195
196         if ((bit_offset + bit_count) > (8 * (u32)buffer_desc->buffer.length)) {
197                 status = AE_AML_BUFFER_LIMIT;
198                 ACPI_BIOS_EXCEPTION((AE_INFO, status,
199                                      "Field [%4.4s] at bit offset/length %u/%u "
200                                      "exceeds size of target Buffer (%u bits)",
201                                      acpi_ut_get_node_name(result_desc),
202                                      bit_offset, bit_count,
203                                      8 * (u32)buffer_desc->buffer.length));
204                 goto cleanup;
205         }
206
207         /*
208          * Initialize areas of the field object that are common to all fields
209          * For field_flags, use LOCK_RULE = 0 (NO_LOCK),
210          * UPDATE_RULE = 0 (UPDATE_PRESERVE)
211          */
212         status =
213             acpi_ex_prep_common_field_object(obj_desc, field_flags, 0,
214                                              bit_offset, bit_count);
215         if (ACPI_FAILURE(status)) {
216                 goto cleanup;
217         }
218
219         obj_desc->buffer_field.buffer_obj = buffer_desc;
220         obj_desc->buffer_field.is_create_field =
221             aml_opcode == AML_CREATE_FIELD_OP;
222
223         /* Reference count for buffer_desc inherits obj_desc count */
224
225         buffer_desc->common.reference_count = (u16)
226             (buffer_desc->common.reference_count +
227              obj_desc->common.reference_count);
228
229 cleanup:
230
231         /* Always delete the operands */
232
233         acpi_ut_remove_reference(offset_desc);
234         acpi_ut_remove_reference(buffer_desc);
235
236         if (aml_opcode == AML_CREATE_FIELD_OP) {
237                 acpi_ut_remove_reference(length_desc);
238         }
239
240         /* On failure, delete the result descriptor */
241
242         if (ACPI_FAILURE(status)) {
243                 acpi_ut_remove_reference(result_desc);  /* Result descriptor */
244         } else {
245                 /* Now the address and length are valid for this buffer_field */
246
247                 obj_desc->buffer_field.flags |= AOPOBJ_DATA_VALID;
248         }
249
250         return_ACPI_STATUS(status);
251 }
252
253 /*******************************************************************************
254  *
255  * FUNCTION:    acpi_ds_eval_buffer_field_operands
256  *
257  * PARAMETERS:  walk_state      - Current walk
258  *              op              - A valid buffer_field Op object
259  *
260  * RETURN:      Status
261  *
262  * DESCRIPTION: Get buffer_field Buffer and Index
263  *              Called from acpi_ds_exec_end_op during buffer_field parse tree walk
264  *
265  ******************************************************************************/
266
267 acpi_status
268 acpi_ds_eval_buffer_field_operands(struct acpi_walk_state *walk_state,
269                                    union acpi_parse_object *op)
270 {
271         acpi_status status;
272         union acpi_operand_object *obj_desc;
273         struct acpi_namespace_node *node;
274         union acpi_parse_object *next_op;
275
276         ACPI_FUNCTION_TRACE_PTR(ds_eval_buffer_field_operands, op);
277
278         /*
279          * This is where we evaluate the address and length fields of the
280          * create_xxx_field declaration
281          */
282         node = op->common.node;
283
284         /* next_op points to the op that holds the Buffer */
285
286         next_op = op->common.value.arg;
287
288         /* Evaluate/create the address and length operands */
289
290         status = acpi_ds_create_operands(walk_state, next_op);
291         if (ACPI_FAILURE(status)) {
292                 return_ACPI_STATUS(status);
293         }
294
295         obj_desc = acpi_ns_get_attached_object(node);
296         if (!obj_desc) {
297                 return_ACPI_STATUS(AE_NOT_EXIST);
298         }
299
300         /* Resolve the operands */
301
302         status =
303             acpi_ex_resolve_operands(op->common.aml_opcode, ACPI_WALK_OPERANDS,
304                                      walk_state);
305         if (ACPI_FAILURE(status)) {
306                 ACPI_ERROR((AE_INFO, "(%s) bad operand(s), status 0x%X",
307                             acpi_ps_get_opcode_name(op->common.aml_opcode),
308                             status));
309
310                 return_ACPI_STATUS(status);
311         }
312
313         /* Initialize the Buffer Field */
314
315         if (op->common.aml_opcode == AML_CREATE_FIELD_OP) {
316
317                 /* NOTE: Slightly different operands for this opcode */
318
319                 status =
320                     acpi_ds_init_buffer_field(op->common.aml_opcode, obj_desc,
321                                               walk_state->operands[0],
322                                               walk_state->operands[1],
323                                               walk_state->operands[2],
324                                               walk_state->operands[3]);
325         } else {
326                 /* All other, create_xxx_field opcodes */
327
328                 status =
329                     acpi_ds_init_buffer_field(op->common.aml_opcode, obj_desc,
330                                               walk_state->operands[0],
331                                               walk_state->operands[1], NULL,
332                                               walk_state->operands[2]);
333         }
334
335         return_ACPI_STATUS(status);
336 }
337
338 /*******************************************************************************
339  *
340  * FUNCTION:    acpi_ds_eval_region_operands
341  *
342  * PARAMETERS:  walk_state      - Current walk
343  *              op              - A valid region Op object
344  *
345  * RETURN:      Status
346  *
347  * DESCRIPTION: Get region address and length
348  *              Called from acpi_ds_exec_end_op during op_region parse tree walk
349  *
350  ******************************************************************************/
351
352 acpi_status
353 acpi_ds_eval_region_operands(struct acpi_walk_state *walk_state,
354                              union acpi_parse_object *op)
355 {
356         acpi_status status;
357         union acpi_operand_object *obj_desc;
358         union acpi_operand_object *operand_desc;
359         struct acpi_namespace_node *node;
360         union acpi_parse_object *next_op;
361         acpi_adr_space_type space_id;
362
363         ACPI_FUNCTION_TRACE_PTR(ds_eval_region_operands, op);
364
365         /*
366          * This is where we evaluate the address and length fields of the
367          * op_region declaration
368          */
369         node = op->common.node;
370
371         /* next_op points to the op that holds the space_ID */
372
373         next_op = op->common.value.arg;
374         space_id = (acpi_adr_space_type)next_op->common.value.integer;
375
376         /* next_op points to address op */
377
378         next_op = next_op->common.next;
379
380         /* Evaluate/create the address and length operands */
381
382         status = acpi_ds_create_operands(walk_state, next_op);
383         if (ACPI_FAILURE(status)) {
384                 return_ACPI_STATUS(status);
385         }
386
387         /* Resolve the length and address operands to numbers */
388
389         status =
390             acpi_ex_resolve_operands(op->common.aml_opcode, ACPI_WALK_OPERANDS,
391                                      walk_state);
392         if (ACPI_FAILURE(status)) {
393                 return_ACPI_STATUS(status);
394         }
395
396         obj_desc = acpi_ns_get_attached_object(node);
397         if (!obj_desc) {
398                 return_ACPI_STATUS(AE_NOT_EXIST);
399         }
400
401         /*
402          * Get the length operand and save it
403          * (at Top of stack)
404          */
405         operand_desc = walk_state->operands[walk_state->num_operands - 1];
406
407         obj_desc->region.length = (u32) operand_desc->integer.value;
408         acpi_ut_remove_reference(operand_desc);
409
410         /* A zero-length operation region is unusable. Just warn */
411
412         if (!obj_desc->region.length
413             && (space_id < ACPI_NUM_PREDEFINED_REGIONS)) {
414                 ACPI_WARNING((AE_INFO,
415                               "Operation Region [%4.4s] has zero length (SpaceId %X)",
416                               node->name.ascii, space_id));
417         }
418
419         /*
420          * Get the address and save it
421          * (at top of stack - 1)
422          */
423         operand_desc = walk_state->operands[walk_state->num_operands - 2];
424
425         obj_desc->region.address = (acpi_physical_address)
426             operand_desc->integer.value;
427         acpi_ut_remove_reference(operand_desc);
428
429         ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n",
430                           obj_desc,
431                           ACPI_FORMAT_UINT64(obj_desc->region.address),
432                           obj_desc->region.length));
433
434         status = acpi_ut_add_address_range(obj_desc->region.space_id,
435                                            obj_desc->region.address,
436                                            obj_desc->region.length, node);
437
438         /* Now the address and length are valid for this opregion */
439
440         obj_desc->region.flags |= AOPOBJ_DATA_VALID;
441         return_ACPI_STATUS(status);
442 }
443
444 /*******************************************************************************
445  *
446  * FUNCTION:    acpi_ds_eval_table_region_operands
447  *
448  * PARAMETERS:  walk_state      - Current walk
449  *              op              - A valid region Op object
450  *
451  * RETURN:      Status
452  *
453  * DESCRIPTION: Get region address and length.
454  *              Called from acpi_ds_exec_end_op during data_table_region parse
455  *              tree walk.
456  *
457  ******************************************************************************/
458
459 acpi_status
460 acpi_ds_eval_table_region_operands(struct acpi_walk_state *walk_state,
461                                    union acpi_parse_object *op)
462 {
463         acpi_status status;
464         union acpi_operand_object *obj_desc;
465         union acpi_operand_object **operand;
466         struct acpi_namespace_node *node;
467         union acpi_parse_object *next_op;
468         struct acpi_table_header *table;
469         u32 table_index;
470
471         ACPI_FUNCTION_TRACE_PTR(ds_eval_table_region_operands, op);
472
473         /*
474          * This is where we evaluate the Signature string, oem_id string,
475          * and oem_table_id string of the Data Table Region declaration
476          */
477         node = op->common.node;
478
479         /* next_op points to Signature string op */
480
481         next_op = op->common.value.arg;
482
483         /*
484          * Evaluate/create the Signature string, oem_id string,
485          * and oem_table_id string operands
486          */
487         status = acpi_ds_create_operands(walk_state, next_op);
488         if (ACPI_FAILURE(status)) {
489                 return_ACPI_STATUS(status);
490         }
491
492         operand = &walk_state->operands[0];
493
494         /*
495          * Resolve the Signature string, oem_id string,
496          * and oem_table_id string operands
497          */
498         status =
499             acpi_ex_resolve_operands(op->common.aml_opcode, ACPI_WALK_OPERANDS,
500                                      walk_state);
501         if (ACPI_FAILURE(status)) {
502                 goto cleanup;
503         }
504
505         /* Find the ACPI table */
506
507         status = acpi_tb_find_table(operand[0]->string.pointer,
508                                     operand[1]->string.pointer,
509                                     operand[2]->string.pointer, &table_index);
510         if (ACPI_FAILURE(status)) {
511                 if (status == AE_NOT_FOUND) {
512                         ACPI_ERROR((AE_INFO,
513                                     "ACPI Table [%4.4s] OEM:(%s, %s) not found in RSDT/XSDT",
514                                     operand[0]->string.pointer,
515                                     operand[1]->string.pointer,
516                                     operand[2]->string.pointer));
517                 }
518                 goto cleanup;
519         }
520
521         status = acpi_get_table_by_index(table_index, &table);
522         if (ACPI_FAILURE(status)) {
523                 goto cleanup;
524         }
525
526         obj_desc = acpi_ns_get_attached_object(node);
527         if (!obj_desc) {
528                 status = AE_NOT_EXIST;
529                 goto cleanup;
530         }
531
532         obj_desc->region.address = ACPI_PTR_TO_PHYSADDR(table);
533         obj_desc->region.length = table->length;
534
535         ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n",
536                           obj_desc,
537                           ACPI_FORMAT_UINT64(obj_desc->region.address),
538                           obj_desc->region.length));
539
540         /* Now the address and length are valid for this opregion */
541
542         obj_desc->region.flags |= AOPOBJ_DATA_VALID;
543
544 cleanup:
545         acpi_ut_remove_reference(operand[0]);
546         acpi_ut_remove_reference(operand[1]);
547         acpi_ut_remove_reference(operand[2]);
548
549         return_ACPI_STATUS(status);
550 }
551
552 /*******************************************************************************
553  *
554  * FUNCTION:    acpi_ds_eval_data_object_operands
555  *
556  * PARAMETERS:  walk_state      - Current walk
557  *              op              - A valid data_object Op object
558  *              obj_desc        - data_object
559  *
560  * RETURN:      Status
561  *
562  * DESCRIPTION: Get the operands and complete the following data object types:
563  *              Buffer, Package.
564  *
565  ******************************************************************************/
566
567 acpi_status
568 acpi_ds_eval_data_object_operands(struct acpi_walk_state *walk_state,
569                                   union acpi_parse_object *op,
570                                   union acpi_operand_object *obj_desc)
571 {
572         acpi_status status;
573         union acpi_operand_object *arg_desc;
574         u32 length;
575
576         ACPI_FUNCTION_TRACE(ds_eval_data_object_operands);
577
578         /* The first operand (for all of these data objects) is the length */
579
580         /*
581          * Set proper index into operand stack for acpi_ds_obj_stack_push
582          * invoked inside acpi_ds_create_operand.
583          */
584         walk_state->operand_index = walk_state->num_operands;
585
586         /* Ignore if child is not valid */
587
588         if (!op->common.value.arg) {
589                 ACPI_ERROR((AE_INFO,
590                             "Missing child while evaluating opcode %4.4X, Op %p",
591                             op->common.aml_opcode, op));
592                 return_ACPI_STATUS(AE_OK);
593         }
594
595         status = acpi_ds_create_operand(walk_state, op->common.value.arg, 1);
596         if (ACPI_FAILURE(status)) {
597                 return_ACPI_STATUS(status);
598         }
599
600         status = acpi_ex_resolve_operands(walk_state->opcode,
601                                           &(walk_state->
602                                             operands[walk_state->num_operands -
603                                                      1]), walk_state);
604         if (ACPI_FAILURE(status)) {
605                 return_ACPI_STATUS(status);
606         }
607
608         /* Extract length operand */
609
610         arg_desc = walk_state->operands[walk_state->num_operands - 1];
611         length = (u32) arg_desc->integer.value;
612
613         /* Cleanup for length operand */
614
615         status = acpi_ds_obj_stack_pop(1, walk_state);
616         if (ACPI_FAILURE(status)) {
617                 return_ACPI_STATUS(status);
618         }
619
620         acpi_ut_remove_reference(arg_desc);
621
622         /*
623          * Create the actual data object
624          */
625         switch (op->common.aml_opcode) {
626         case AML_BUFFER_OP:
627
628                 status =
629                     acpi_ds_build_internal_buffer_obj(walk_state, op, length,
630                                                       &obj_desc);
631                 break;
632
633         case AML_PACKAGE_OP:
634         case AML_VARIABLE_PACKAGE_OP:
635
636                 status =
637                     acpi_ds_build_internal_package_obj(walk_state, op, length,
638                                                        &obj_desc);
639                 break;
640
641         default:
642
643                 return_ACPI_STATUS(AE_AML_BAD_OPCODE);
644         }
645
646         if (ACPI_SUCCESS(status)) {
647                 /*
648                  * Return the object in the walk_state, unless the parent is a package -
649                  * in this case, the return object will be stored in the parse tree
650                  * for the package.
651                  */
652                 if ((!op->common.parent) ||
653                     ((op->common.parent->common.aml_opcode != AML_PACKAGE_OP) &&
654                      (op->common.parent->common.aml_opcode !=
655                       AML_VARIABLE_PACKAGE_OP)
656                      && (op->common.parent->common.aml_opcode !=
657                          AML_NAME_OP))) {
658                         walk_state->result_obj = obj_desc;
659                 }
660         }
661
662         return_ACPI_STATUS(status);
663 }
664
665 /*******************************************************************************
666  *
667  * FUNCTION:    acpi_ds_eval_bank_field_operands
668  *
669  * PARAMETERS:  walk_state      - Current walk
670  *              op              - A valid bank_field Op object
671  *
672  * RETURN:      Status
673  *
674  * DESCRIPTION: Get bank_field bank_value
675  *              Called from acpi_ds_exec_end_op during bank_field parse tree walk
676  *
677  ******************************************************************************/
678
679 acpi_status
680 acpi_ds_eval_bank_field_operands(struct acpi_walk_state *walk_state,
681                                  union acpi_parse_object *op)
682 {
683         acpi_status status;
684         union acpi_operand_object *obj_desc;
685         union acpi_operand_object *operand_desc;
686         struct acpi_namespace_node *node;
687         union acpi_parse_object *next_op;
688         union acpi_parse_object *arg;
689
690         ACPI_FUNCTION_TRACE_PTR(ds_eval_bank_field_operands, op);
691
692         /*
693          * This is where we evaluate the bank_value field of the
694          * bank_field declaration
695          */
696
697         /* next_op points to the op that holds the Region */
698
699         next_op = op->common.value.arg;
700
701         /* next_op points to the op that holds the Bank Register */
702
703         next_op = next_op->common.next;
704
705         /* next_op points to the op that holds the Bank Value */
706
707         next_op = next_op->common.next;
708
709         /*
710          * Set proper index into operand stack for acpi_ds_obj_stack_push
711          * invoked inside acpi_ds_create_operand.
712          *
713          * We use walk_state->Operands[0] to store the evaluated bank_value
714          */
715         walk_state->operand_index = 0;
716
717         status = acpi_ds_create_operand(walk_state, next_op, 0);
718         if (ACPI_FAILURE(status)) {
719                 return_ACPI_STATUS(status);
720         }
721
722         status = acpi_ex_resolve_to_value(&walk_state->operands[0], walk_state);
723         if (ACPI_FAILURE(status)) {
724                 return_ACPI_STATUS(status);
725         }
726
727         ACPI_DUMP_OPERANDS(ACPI_WALK_OPERANDS,
728                            acpi_ps_get_opcode_name(op->common.aml_opcode), 1);
729         /*
730          * Get the bank_value operand and save it
731          * (at Top of stack)
732          */
733         operand_desc = walk_state->operands[0];
734
735         /* Arg points to the start Bank Field */
736
737         arg = acpi_ps_get_arg(op, 4);
738         while (arg) {
739
740                 /* Ignore OFFSET and ACCESSAS terms here */
741
742                 if (arg->common.aml_opcode == AML_INT_NAMEDFIELD_OP) {
743                         node = arg->common.node;
744
745                         obj_desc = acpi_ns_get_attached_object(node);
746                         if (!obj_desc) {
747                                 return_ACPI_STATUS(AE_NOT_EXIST);
748                         }
749
750                         obj_desc->bank_field.value =
751                             (u32) operand_desc->integer.value;
752                 }
753
754                 /* Move to next field in the list */
755
756                 arg = arg->common.next;
757         }
758
759         acpi_ut_remove_reference(operand_desc);
760         return_ACPI_STATUS(status);
761 }