Linux Audio

Check our new training course

Embedded Linux Audio

Check our new training course
with Creative Commons CC-BY-SA
lecture materials

Bootlin logo

Elixir Cross Referencer

Loading...
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
/******************************************************************************
 *
 * Module Name: nsrepair - Repair for objects returned by predefined methods
 *
 *****************************************************************************/

/*
 * Copyright (C) 2000 - 2011, Intel Corp.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 */

#include <acpi/acpi.h>
#include "accommon.h"
#include "acnamesp.h"
#include "acinterp.h"
#include "acpredef.h"

#define _COMPONENT          ACPI_NAMESPACE
ACPI_MODULE_NAME("nsrepair")

/*******************************************************************************
 *
 * This module attempts to repair or convert objects returned by the
 * predefined methods to an object type that is expected, as per the ACPI
 * specification. The need for this code is dictated by the many machines that
 * return incorrect types for the standard predefined methods. Performing these
 * conversions here, in one place, eliminates the need for individual ACPI
 * device drivers to do the same. Note: Most of these conversions are different
 * than the internal object conversion routines used for implicit object
 * conversion.
 *
 * The following conversions can be performed as necessary:
 *
 * Integer -> String
 * Integer -> Buffer
 * String  -> Integer
 * String  -> Buffer
 * Buffer  -> Integer
 * Buffer  -> String
 * Buffer  -> Package of Integers
 * Package -> Package of one Package
 *
 * Additional possible repairs:
 *
 * Required package elements that are NULL replaced by Integer/String/Buffer
 * Incorrect standalone package wrapped with required outer package
 *
 ******************************************************************************/
/* Local prototypes */
static acpi_status
acpi_ns_convert_to_integer(union acpi_operand_object *original_object,
			   union acpi_operand_object **return_object);

static acpi_status
acpi_ns_convert_to_string(union acpi_operand_object *original_object,
			  union acpi_operand_object **return_object);

static acpi_status
acpi_ns_convert_to_buffer(union acpi_operand_object *original_object,
			  union acpi_operand_object **return_object);

static acpi_status
acpi_ns_convert_to_package(union acpi_operand_object *original_object,
			   union acpi_operand_object **return_object);

/*******************************************************************************
 *
 * FUNCTION:    acpi_ns_repair_object
 *
 * PARAMETERS:  Data                - Pointer to validation data structure
 *              expected_btypes     - Object types expected
 *              package_index       - Index of object within parent package (if
 *                                    applicable - ACPI_NOT_PACKAGE_ELEMENT
 *                                    otherwise)
 *              return_object_ptr   - Pointer to the object returned from the
 *                                    evaluation of a method or object
 *
 * RETURN:      Status. AE_OK if repair was successful.
 *
 * DESCRIPTION: Attempt to repair/convert a return object of a type that was
 *              not expected.
 *
 ******************************************************************************/

acpi_status
acpi_ns_repair_object(struct acpi_predefined_data *data,
		      u32 expected_btypes,
		      u32 package_index,
		      union acpi_operand_object **return_object_ptr)
{
	union acpi_operand_object *return_object = *return_object_ptr;
	union acpi_operand_object *new_object;
	acpi_status status;

	ACPI_FUNCTION_NAME(ns_repair_object);

	/*
	 * At this point, we know that the type of the returned object was not
	 * one of the expected types for this predefined name. Attempt to
	 * repair the object by converting it to one of the expected object
	 * types for this predefined name.
	 */
	if (expected_btypes & ACPI_RTYPE_INTEGER) {
		status = acpi_ns_convert_to_integer(return_object, &new_object);
		if (ACPI_SUCCESS(status)) {
			goto object_repaired;
		}
	}
	if (expected_btypes & ACPI_RTYPE_STRING) {
		status = acpi_ns_convert_to_string(return_object, &new_object);
		if (ACPI_SUCCESS(status)) {
			goto object_repaired;
		}
	}
	if (expected_btypes & ACPI_RTYPE_BUFFER) {
		status = acpi_ns_convert_to_buffer(return_object, &new_object);
		if (ACPI_SUCCESS(status)) {
			goto object_repaired;
		}
	}
	if (expected_btypes & ACPI_RTYPE_PACKAGE) {
		status = acpi_ns_convert_to_package(return_object, &new_object);
		if (ACPI_SUCCESS(status)) {
			goto object_repaired;
		}
	}

	/* We cannot repair this object */

	return (AE_AML_OPERAND_TYPE);

      object_repaired:

	/* Object was successfully repaired */

	/*
	 * If the original object is a package element, we need to:
	 * 1. Set the reference count of the new object to match the
	 *    reference count of the old object.
	 * 2. Decrement the reference count of the original object.
	 */
	if (package_index != ACPI_NOT_PACKAGE_ELEMENT) {
		new_object->common.reference_count =
		    return_object->common.reference_count;

		if (return_object->common.reference_count > 1) {
			return_object->common.reference_count--;
		}

		ACPI_DEBUG_PRINT((ACPI_DB_REPAIR,
				  "%s: Converted %s to expected %s at index %u\n",
				  data->pathname,
				  acpi_ut_get_object_type_name(return_object),
				  acpi_ut_get_object_type_name(new_object),
				  package_index));
	} else {
		ACPI_DEBUG_PRINT((ACPI_DB_REPAIR,
				  "%s: Converted %s to expected %s\n",
				  data->pathname,
				  acpi_ut_get_object_type_name(return_object),
				  acpi_ut_get_object_type_name(new_object)));
	}

	/* Delete old object, install the new return object */

	acpi_ut_remove_reference(return_object);
	*return_object_ptr = new_object;
	data->flags |= ACPI_OBJECT_REPAIRED;
	return (AE_OK);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ns_convert_to_integer
 *
 * PARAMETERS:  original_object     - Object to be converted
 *              return_object       - Where the new converted object is returned
 *
 * RETURN:      Status. AE_OK if conversion was successful.
 *
 * DESCRIPTION: Attempt to convert a String/Buffer object to an Integer.
 *
 ******************************************************************************/

static acpi_status
acpi_ns_convert_to_integer(union acpi_operand_object *original_object,
			   union acpi_operand_object **return_object)
{
	union acpi_operand_object *new_object;
	acpi_status status;
	u64 value = 0;
	u32 i;

	switch (original_object->common.type) {
	case ACPI_TYPE_STRING:

		/* String-to-Integer conversion */

		status = acpi_ut_strtoul64(original_object->string.pointer,
					   ACPI_ANY_BASE, &value);
		if (ACPI_FAILURE(status)) {
			return (status);
		}
		break;

	case ACPI_TYPE_BUFFER:

		/* Buffer-to-Integer conversion. Max buffer size is 64 bits. */

		if (original_object->buffer.length > 8) {
			return (AE_AML_OPERAND_TYPE);
		}

		/* Extract each buffer byte to create the integer */

		for (i = 0; i < original_object->buffer.length; i++) {
			value |=
			    ((u64) original_object->buffer.
			     pointer[i] << (i * 8));
		}
		break;

	default:
		return (AE_AML_OPERAND_TYPE);
	}

	new_object = acpi_ut_create_integer_object(value);
	if (!new_object) {
		return (AE_NO_MEMORY);
	}

	*return_object = new_object;
	return (AE_OK);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ns_convert_to_string
 *
 * PARAMETERS:  original_object     - Object to be converted
 *              return_object       - Where the new converted object is returned
 *
 * RETURN:      Status. AE_OK if conversion was successful.
 *
 * DESCRIPTION: Attempt to convert a Integer/Buffer object to a String.
 *
 ******************************************************************************/

static acpi_status
acpi_ns_convert_to_string(union acpi_operand_object *original_object,
			  union acpi_operand_object **return_object)
{
	union acpi_operand_object *new_object;
	acpi_size length;
	acpi_status status;

	switch (original_object->common.type) {
	case ACPI_TYPE_INTEGER:
		/*
		 * Integer-to-String conversion. Commonly, convert
		 * an integer of value 0 to a NULL string. The last element of
		 * _BIF and _BIX packages occasionally need this fix.
		 */
		if (original_object->integer.value == 0) {

			/* Allocate a new NULL string object */

			new_object = acpi_ut_create_string_object(0);
			if (!new_object) {
				return (AE_NO_MEMORY);
			}
		} else {
			status =
			    acpi_ex_convert_to_string(original_object,
						      &new_object,
						      ACPI_IMPLICIT_CONVERT_HEX);
			if (ACPI_FAILURE(status)) {
				return (status);
			}
		}
		break;

	case ACPI_TYPE_BUFFER:
		/*
		 * Buffer-to-String conversion. Use a to_string
		 * conversion, no transform performed on the buffer data. The best
		 * example of this is the _BIF method, where the string data from
		 * the battery is often (incorrectly) returned as buffer object(s).
		 */
		length = 0;
		while ((length < original_object->buffer.length) &&
		       (original_object->buffer.pointer[length])) {
			length++;
		}

		/* Allocate a new string object */

		new_object = acpi_ut_create_string_object(length);
		if (!new_object) {
			return (AE_NO_MEMORY);
		}

		/*
		 * Copy the raw buffer data with no transform. String is already NULL
		 * terminated at Length+1.
		 */
		ACPI_MEMCPY(new_object->string.pointer,
			    original_object->buffer.pointer, length);
		break;

	default:
		return (AE_AML_OPERAND_TYPE);
	}

	*return_object = new_object;
	return (AE_OK);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ns_convert_to_buffer
 *
 * PARAMETERS:  original_object     - Object to be converted
 *              return_object       - Where the new converted object is returned
 *
 * RETURN:      Status. AE_OK if conversion was successful.
 *
 * DESCRIPTION: Attempt to convert a Integer/String/Package object to a Buffer.
 *
 ******************************************************************************/

static acpi_status
acpi_ns_convert_to_buffer(union acpi_operand_object *original_object,
			  union acpi_operand_object **return_object)
{
	union acpi_operand_object *new_object;
	acpi_status status;
	union acpi_operand_object **elements;
	u32 *dword_buffer;
	u32 count;
	u32 i;

	switch (original_object->common.type) {
	case ACPI_TYPE_INTEGER:
		/*
		 * Integer-to-Buffer conversion.
		 * Convert the Integer to a packed-byte buffer. _MAT and other
		 * objects need this sometimes, if a read has been performed on a
		 * Field object that is less than or equal to the global integer
		 * size (32 or 64 bits).
		 */
		status =
		    acpi_ex_convert_to_buffer(original_object, &new_object);
		if (ACPI_FAILURE(status)) {
			return (status);
		}
		break;

	case ACPI_TYPE_STRING:

		/* String-to-Buffer conversion. Simple data copy */

		new_object =
		    acpi_ut_create_buffer_object(original_object->string.
						 length);
		if (!new_object) {
			return (AE_NO_MEMORY);
		}

		ACPI_MEMCPY(new_object->buffer.pointer,
			    original_object->string.pointer,
			    original_object->string.length);
		break;

	case ACPI_TYPE_PACKAGE:
		/*
		 * This case is often seen for predefined names that must return a
		 * Buffer object with multiple DWORD integers within. For example,
		 * _FDE and _GTM. The Package can be converted to a Buffer.
		 */

		/* All elements of the Package must be integers */

		elements = original_object->package.elements;
		count = original_object->package.count;

		for (i = 0; i < count; i++) {
			if ((!*elements) ||
			    ((*elements)->common.type != ACPI_TYPE_INTEGER)) {
				return (AE_AML_OPERAND_TYPE);
			}
			elements++;
		}

		/* Create the new buffer object to replace the Package */

		new_object = acpi_ut_create_buffer_object(ACPI_MUL_4(count));
		if (!new_object) {
			return (AE_NO_MEMORY);
		}

		/* Copy the package elements (integers) to the buffer as DWORDs */

		elements = original_object->package.elements;
		dword_buffer = ACPI_CAST_PTR(u32, new_object->buffer.pointer);

		for (i = 0; i < count; i++) {
			*dword_buffer = (u32) (*elements)->integer.value;
			dword_buffer++;
			elements++;
		}
		break;

	default:
		return (AE_AML_OPERAND_TYPE);
	}

	*return_object = new_object;
	return (AE_OK);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ns_convert_to_package
 *
 * PARAMETERS:  original_object     - Object to be converted
 *              return_object       - Where the new converted object is returned
 *
 * RETURN:      Status. AE_OK if conversion was successful.
 *
 * DESCRIPTION: Attempt to convert a Buffer object to a Package. Each byte of
 *              the buffer is converted to a single integer package element.
 *
 ******************************************************************************/

static acpi_status
acpi_ns_convert_to_package(union acpi_operand_object *original_object,
			   union acpi_operand_object **return_object)
{
	union acpi_operand_object *new_object;
	union acpi_operand_object **elements;
	u32 length;
	u8 *buffer;

	switch (original_object->common.type) {
	case ACPI_TYPE_BUFFER:

		/* Buffer-to-Package conversion */

		length = original_object->buffer.length;
		new_object = acpi_ut_create_package_object(length);
		if (!new_object) {
			return (AE_NO_MEMORY);
		}

		/* Convert each buffer byte to an integer package element */

		elements = new_object->package.elements;
		buffer = original_object->buffer.pointer;

		while (length--) {
			*elements =
			    acpi_ut_create_integer_object((u64) *buffer);
			if (!*elements) {
				acpi_ut_remove_reference(new_object);
				return (AE_NO_MEMORY);
			}
			elements++;
			buffer++;
		}
		break;

	default:
		return (AE_AML_OPERAND_TYPE);
	}

	*return_object = new_object;
	return (AE_OK);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ns_repair_null_element
 *
 * PARAMETERS:  Data                - Pointer to validation data structure
 *              expected_btypes     - Object types expected
 *              package_index       - Index of object within parent package (if
 *                                    applicable - ACPI_NOT_PACKAGE_ELEMENT
 *                                    otherwise)
 *              return_object_ptr   - Pointer to the object returned from the
 *                                    evaluation of a method or object
 *
 * RETURN:      Status. AE_OK if repair was successful.
 *
 * DESCRIPTION: Attempt to repair a NULL element of a returned Package object.
 *
 ******************************************************************************/

acpi_status
acpi_ns_repair_null_element(struct acpi_predefined_data *data,
			    u32 expected_btypes,
			    u32 package_index,
			    union acpi_operand_object **return_object_ptr)
{
	union acpi_operand_object *return_object = *return_object_ptr;
	union acpi_operand_object *new_object;

	ACPI_FUNCTION_NAME(ns_repair_null_element);

	/* No repair needed if return object is non-NULL */

	if (return_object) {
		return (AE_OK);
	}

	/*
	 * Attempt to repair a NULL element of a Package object. This applies to
	 * predefined names that return a fixed-length package and each element
	 * is required. It does not apply to variable-length packages where NULL
	 * elements are allowed, especially at the end of the package.
	 */
	if (expected_btypes & ACPI_RTYPE_INTEGER) {

		/* Need an Integer - create a zero-value integer */

		new_object = acpi_ut_create_integer_object((u64)0);
	} else if (expected_btypes & ACPI_RTYPE_STRING) {

		/* Need a String - create a NULL string */

		new_object = acpi_ut_create_string_object(0);
	} else if (expected_btypes & ACPI_RTYPE_BUFFER) {

		/* Need a Buffer - create a zero-length buffer */

		new_object = acpi_ut_create_buffer_object(0);
	} else {
		/* Error for all other expected types */

		return (AE_AML_OPERAND_TYPE);
	}

	if (!new_object) {
		return (AE_NO_MEMORY);
	}

	/* Set the reference count according to the parent Package object */

	new_object->common.reference_count =
	    data->parent_package->common.reference_count;

	ACPI_DEBUG_PRINT((ACPI_DB_REPAIR,
			  "%s: Converted NULL package element to expected %s at index %u\n",
			  data->pathname,
			  acpi_ut_get_object_type_name(new_object),
			  package_index));

	*return_object_ptr = new_object;
	data->flags |= ACPI_OBJECT_REPAIRED;
	return (AE_OK);
}

/******************************************************************************
 *
 * FUNCTION:    acpi_ns_remove_null_elements
 *
 * PARAMETERS:  Data                - Pointer to validation data structure
 *              package_type        - An acpi_return_package_types value
 *              obj_desc            - A Package object
 *
 * RETURN:      None.
 *
 * DESCRIPTION: Remove all NULL package elements from packages that contain
 *              a variable number of sub-packages. For these types of
 *              packages, NULL elements can be safely removed.
 *
 *****************************************************************************/

void
acpi_ns_remove_null_elements(struct acpi_predefined_data *data,
			     u8 package_type,
			     union acpi_operand_object *obj_desc)
{
	union acpi_operand_object **source;
	union acpi_operand_object **dest;
	u32 count;
	u32 new_count;
	u32 i;

	ACPI_FUNCTION_NAME(ns_remove_null_elements);

	/*
	 * We can safely remove all NULL elements from these package types:
	 * PTYPE1_VAR packages contain a variable number of simple data types.
	 * PTYPE2 packages contain a variable number of sub-packages.
	 */
	switch (package_type) {
	case ACPI_PTYPE1_VAR:
	case ACPI_PTYPE2:
	case ACPI_PTYPE2_COUNT:
	case ACPI_PTYPE2_PKG_COUNT:
	case ACPI_PTYPE2_FIXED:
	case ACPI_PTYPE2_MIN:
	case ACPI_PTYPE2_REV_FIXED:
		break;

	default:
	case ACPI_PTYPE1_FIXED:
	case ACPI_PTYPE1_OPTION:
		return;
	}

	count = obj_desc->package.count;
	new_count = count;

	source = obj_desc->package.elements;
	dest = source;

	/* Examine all elements of the package object, remove nulls */

	for (i = 0; i < count; i++) {
		if (!*source) {
			new_count--;
		} else {
			*dest = *source;
			dest++;
		}
		source++;
	}

	/* Update parent package if any null elements were removed */

	if (new_count < count) {
		ACPI_DEBUG_PRINT((ACPI_DB_REPAIR,
				  "%s: Found and removed %u NULL elements\n",
				  data->pathname, (count - new_count)));

		/* NULL terminate list and update the package count */

		*dest = NULL;
		obj_desc->package.count = new_count;
	}
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ns_repair_package_list
 *
 * PARAMETERS:  Data                - Pointer to validation data structure
 *              obj_desc_ptr        - Pointer to the object to repair. The new
 *                                    package object is returned here,
 *                                    overwriting the old object.
 *
 * RETURN:      Status, new object in *obj_desc_ptr
 *
 * DESCRIPTION: Repair a common problem with objects that are defined to return
 *              a variable-length Package of Packages. If the variable-length
 *              is one, some BIOS code mistakenly simply declares a single
 *              Package instead of a Package with one sub-Package. This
 *              function attempts to repair this error by wrapping a Package
 *              object around the original Package, creating the correct
 *              Package with one sub-Package.
 *
 *              Names that can be repaired in this manner include:
 *              _ALR, _CSD, _HPX, _MLS, _PRT, _PSS, _TRT, TSS
 *
 ******************************************************************************/

acpi_status
acpi_ns_repair_package_list(struct acpi_predefined_data *data,
			    union acpi_operand_object **obj_desc_ptr)
{
	union acpi_operand_object *pkg_obj_desc;

	ACPI_FUNCTION_NAME(ns_repair_package_list);

	/*
	 * Create the new outer package and populate it. The new package will
	 * have a single element, the lone subpackage.
	 */
	pkg_obj_desc = acpi_ut_create_package_object(1);
	if (!pkg_obj_desc) {
		return (AE_NO_MEMORY);
	}

	pkg_obj_desc->package.elements[0] = *obj_desc_ptr;

	/* Return the new object in the object pointer */

	*obj_desc_ptr = pkg_obj_desc;
	data->flags |= ACPI_OBJECT_REPAIRED;

	ACPI_DEBUG_PRINT((ACPI_DB_REPAIR,
			  "%s: Repaired incorrectly formed Package\n",
			  data->pathname));

	return (AE_OK);
}