Bob Moore | b2deadd | 2009-07-24 10:56:43 +0800 | [diff] [blame] | 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: nsrepair - Repair for objects returned by predefined methods |
| 4 | * |
| 5 | *****************************************************************************/ |
| 6 | |
| 7 | /* |
| 8 | * Copyright (C) 2000 - 2009, Intel Corp. |
| 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 | #include <acpi/acpi.h> |
| 45 | #include "accommon.h" |
| 46 | #include "acnamesp.h" |
Lin Ming | 0240d7b | 2009-10-13 10:23:20 +0800 | [diff] [blame] | 47 | #include "acinterp.h" |
Bob Moore | b2deadd | 2009-07-24 10:56:43 +0800 | [diff] [blame] | 48 | |
| 49 | #define _COMPONENT ACPI_NAMESPACE |
| 50 | ACPI_MODULE_NAME("nsrepair") |
| 51 | |
| 52 | /******************************************************************************* |
| 53 | * |
Bob Moore | 47e11d5 | 2009-12-11 15:01:12 +0800 | [diff] [blame] | 54 | * This module attempts to repair or convert objects returned by the |
| 55 | * predefined methods to an object type that is expected, as per the ACPI |
| 56 | * specification. The need for this code is dictated by the many machines that |
| 57 | * return incorrect types for the standard predefined methods. Performing these |
| 58 | * conversions here, in one place, eliminates the need for individual ACPI |
| 59 | * device drivers to do the same. Note: Most of these conversions are different |
| 60 | * than the internal object conversion routines used for implicit object |
| 61 | * conversion. |
| 62 | * |
| 63 | * The following conversions can be performed as necessary: |
| 64 | * |
| 65 | * Integer -> String |
| 66 | * Integer -> Buffer |
| 67 | * String -> Integer |
| 68 | * String -> Buffer |
| 69 | * Buffer -> Integer |
| 70 | * Buffer -> String |
| 71 | * Buffer -> Package of Integers |
| 72 | * Package -> Package of one Package |
| 73 | * |
| 74 | ******************************************************************************/ |
| 75 | /* Local prototypes */ |
| 76 | static acpi_status |
| 77 | acpi_ns_convert_to_integer(union acpi_operand_object *original_object, |
| 78 | union acpi_operand_object **return_object); |
| 79 | |
| 80 | static acpi_status |
| 81 | acpi_ns_convert_to_string(union acpi_operand_object *original_object, |
| 82 | union acpi_operand_object **return_object); |
| 83 | |
| 84 | static acpi_status |
| 85 | acpi_ns_convert_to_buffer(union acpi_operand_object *original_object, |
| 86 | union acpi_operand_object **return_object); |
| 87 | |
| 88 | static acpi_status |
| 89 | acpi_ns_convert_to_package(union acpi_operand_object *original_object, |
| 90 | union acpi_operand_object **return_object); |
| 91 | |
| 92 | /******************************************************************************* |
| 93 | * |
Bob Moore | b2deadd | 2009-07-24 10:56:43 +0800 | [diff] [blame] | 94 | * FUNCTION: acpi_ns_repair_object |
| 95 | * |
| 96 | * PARAMETERS: Data - Pointer to validation data structure |
| 97 | * expected_btypes - Object types expected |
| 98 | * package_index - Index of object within parent package (if |
| 99 | * applicable - ACPI_NOT_PACKAGE_ELEMENT |
| 100 | * otherwise) |
| 101 | * return_object_ptr - Pointer to the object returned from the |
| 102 | * evaluation of a method or object |
| 103 | * |
| 104 | * RETURN: Status. AE_OK if repair was successful. |
| 105 | * |
| 106 | * DESCRIPTION: Attempt to repair/convert a return object of a type that was |
| 107 | * not expected. |
| 108 | * |
| 109 | ******************************************************************************/ |
Bob Moore | 47e11d5 | 2009-12-11 15:01:12 +0800 | [diff] [blame] | 110 | |
Bob Moore | b2deadd | 2009-07-24 10:56:43 +0800 | [diff] [blame] | 111 | acpi_status |
| 112 | acpi_ns_repair_object(struct acpi_predefined_data *data, |
| 113 | u32 expected_btypes, |
| 114 | u32 package_index, |
| 115 | union acpi_operand_object **return_object_ptr) |
| 116 | { |
| 117 | union acpi_operand_object *return_object = *return_object_ptr; |
| 118 | union acpi_operand_object *new_object; |
Lin Ming | 0240d7b | 2009-10-13 10:23:20 +0800 | [diff] [blame] | 119 | acpi_status status; |
Bob Moore | b2deadd | 2009-07-24 10:56:43 +0800 | [diff] [blame] | 120 | |
Bob Moore | 2752699 | 2009-10-13 10:20:33 +0800 | [diff] [blame] | 121 | /* |
| 122 | * At this point, we know that the type of the returned object was not |
| 123 | * one of the expected types for this predefined name. Attempt to |
Bob Moore | 47e11d5 | 2009-12-11 15:01:12 +0800 | [diff] [blame] | 124 | * repair the object by converting it to one of the expected object |
| 125 | * types for this predefined name. |
Bob Moore | 2752699 | 2009-10-13 10:20:33 +0800 | [diff] [blame] | 126 | */ |
Bob Moore | 47e11d5 | 2009-12-11 15:01:12 +0800 | [diff] [blame] | 127 | if (expected_btypes & ACPI_RTYPE_INTEGER) { |
| 128 | status = acpi_ns_convert_to_integer(return_object, &new_object); |
| 129 | if (ACPI_SUCCESS(status)) { |
| 130 | goto object_repaired; |
Bob Moore | b2deadd | 2009-07-24 10:56:43 +0800 | [diff] [blame] | 131 | } |
Bob Moore | b2deadd | 2009-07-24 10:56:43 +0800 | [diff] [blame] | 132 | } |
Bob Moore | 47e11d5 | 2009-12-11 15:01:12 +0800 | [diff] [blame] | 133 | if (expected_btypes & ACPI_RTYPE_STRING) { |
| 134 | status = acpi_ns_convert_to_string(return_object, &new_object); |
| 135 | if (ACPI_SUCCESS(status)) { |
| 136 | goto object_repaired; |
| 137 | } |
| 138 | } |
| 139 | if (expected_btypes & ACPI_RTYPE_BUFFER) { |
| 140 | status = acpi_ns_convert_to_buffer(return_object, &new_object); |
| 141 | if (ACPI_SUCCESS(status)) { |
| 142 | goto object_repaired; |
| 143 | } |
| 144 | } |
| 145 | if (expected_btypes & ACPI_RTYPE_PACKAGE) { |
| 146 | status = acpi_ns_convert_to_package(return_object, &new_object); |
| 147 | if (ACPI_SUCCESS(status)) { |
| 148 | goto object_repaired; |
| 149 | } |
| 150 | } |
| 151 | |
| 152 | /* We cannot repair this object */ |
| 153 | |
| 154 | return (AE_AML_OPERAND_TYPE); |
| 155 | |
| 156 | object_repaired: |
Bob Moore | b2deadd | 2009-07-24 10:56:43 +0800 | [diff] [blame] | 157 | |
Bob Moore | 2752699 | 2009-10-13 10:20:33 +0800 | [diff] [blame] | 158 | /* Object was successfully repaired */ |
| 159 | |
| 160 | /* |
| 161 | * If the original object is a package element, we need to: |
| 162 | * 1. Set the reference count of the new object to match the |
| 163 | * reference count of the old object. |
| 164 | * 2. Decrement the reference count of the original object. |
| 165 | */ |
| 166 | if (package_index != ACPI_NOT_PACKAGE_ELEMENT) { |
| 167 | new_object->common.reference_count = |
| 168 | return_object->common.reference_count; |
| 169 | |
| 170 | if (return_object->common.reference_count > 1) { |
| 171 | return_object->common.reference_count--; |
| 172 | } |
| 173 | |
Bob Moore | 7df200c | 2009-11-12 09:18:45 +0800 | [diff] [blame] | 174 | ACPI_INFO_PREDEFINED((AE_INFO, data->pathname, data->node_flags, |
Bob Moore | 2752699 | 2009-10-13 10:20:33 +0800 | [diff] [blame] | 175 | "Converted %s to expected %s at index %u", |
| 176 | acpi_ut_get_object_type_name |
| 177 | (return_object), |
| 178 | acpi_ut_get_object_type_name(new_object), |
| 179 | package_index)); |
| 180 | } else { |
Bob Moore | 7df200c | 2009-11-12 09:18:45 +0800 | [diff] [blame] | 181 | ACPI_INFO_PREDEFINED((AE_INFO, data->pathname, data->node_flags, |
Bob Moore | 2752699 | 2009-10-13 10:20:33 +0800 | [diff] [blame] | 182 | "Converted %s to expected %s", |
| 183 | acpi_ut_get_object_type_name |
| 184 | (return_object), |
| 185 | acpi_ut_get_object_type_name |
| 186 | (new_object))); |
| 187 | } |
| 188 | |
| 189 | /* Delete old object, install the new return object */ |
| 190 | |
| 191 | acpi_ut_remove_reference(return_object); |
| 192 | *return_object_ptr = new_object; |
| 193 | data->flags |= ACPI_OBJECT_REPAIRED; |
| 194 | return (AE_OK); |
Bob Moore | b2deadd | 2009-07-24 10:56:43 +0800 | [diff] [blame] | 195 | } |
Bob Moore | e5f69d6 | 2009-07-24 11:03:09 +0800 | [diff] [blame] | 196 | |
| 197 | /******************************************************************************* |
| 198 | * |
Bob Moore | 47e11d5 | 2009-12-11 15:01:12 +0800 | [diff] [blame] | 199 | * FUNCTION: acpi_ns_convert_to_integer |
| 200 | * |
| 201 | * PARAMETERS: original_object - Object to be converted |
| 202 | * return_object - Where the new converted object is returned |
| 203 | * |
| 204 | * RETURN: Status. AE_OK if conversion was successful. |
| 205 | * |
| 206 | * DESCRIPTION: Attempt to convert a String/Buffer object to an Integer. |
| 207 | * |
| 208 | ******************************************************************************/ |
| 209 | |
| 210 | static acpi_status |
| 211 | acpi_ns_convert_to_integer(union acpi_operand_object *original_object, |
| 212 | union acpi_operand_object **return_object) |
| 213 | { |
| 214 | union acpi_operand_object *new_object; |
| 215 | acpi_status status; |
| 216 | u64 value = 0; |
| 217 | u32 i; |
| 218 | |
| 219 | switch (original_object->common.type) { |
| 220 | case ACPI_TYPE_STRING: |
| 221 | |
| 222 | /* String-to-Integer conversion */ |
| 223 | |
| 224 | status = acpi_ut_strtoul64(original_object->string.pointer, |
| 225 | ACPI_ANY_BASE, &value); |
| 226 | if (ACPI_FAILURE(status)) { |
| 227 | return (status); |
| 228 | } |
| 229 | break; |
| 230 | |
| 231 | case ACPI_TYPE_BUFFER: |
| 232 | |
| 233 | /* Buffer-to-Integer conversion. Max buffer size is 64 bits. */ |
| 234 | |
| 235 | if (original_object->buffer.length > 8) { |
| 236 | return (AE_AML_OPERAND_TYPE); |
| 237 | } |
| 238 | |
| 239 | /* Extract each buffer byte to create the integer */ |
| 240 | |
| 241 | for (i = 0; i < original_object->buffer.length; i++) { |
| 242 | value |= |
| 243 | ((u64) original_object->buffer. |
| 244 | pointer[i] << (i * 8)); |
| 245 | } |
| 246 | break; |
| 247 | |
| 248 | default: |
| 249 | return (AE_AML_OPERAND_TYPE); |
| 250 | } |
| 251 | |
| 252 | new_object = acpi_ut_create_integer_object(value); |
| 253 | if (!new_object) { |
| 254 | return (AE_NO_MEMORY); |
| 255 | } |
| 256 | |
| 257 | *return_object = new_object; |
| 258 | return (AE_OK); |
| 259 | } |
| 260 | |
| 261 | /******************************************************************************* |
| 262 | * |
| 263 | * FUNCTION: acpi_ns_convert_to_string |
| 264 | * |
| 265 | * PARAMETERS: original_object - Object to be converted |
| 266 | * return_object - Where the new converted object is returned |
| 267 | * |
| 268 | * RETURN: Status. AE_OK if conversion was successful. |
| 269 | * |
| 270 | * DESCRIPTION: Attempt to convert a Integer/Buffer object to a String. |
| 271 | * |
| 272 | ******************************************************************************/ |
| 273 | |
| 274 | static acpi_status |
| 275 | acpi_ns_convert_to_string(union acpi_operand_object *original_object, |
| 276 | union acpi_operand_object **return_object) |
| 277 | { |
| 278 | union acpi_operand_object *new_object; |
| 279 | acpi_size length; |
| 280 | acpi_status status; |
| 281 | |
| 282 | switch (original_object->common.type) { |
| 283 | case ACPI_TYPE_INTEGER: |
| 284 | /* |
| 285 | * Integer-to-String conversion. Commonly, convert |
| 286 | * an integer of value 0 to a NULL string. The last element of |
| 287 | * _BIF and _BIX packages occasionally need this fix. |
| 288 | */ |
| 289 | if (original_object->integer.value == 0) { |
| 290 | |
| 291 | /* Allocate a new NULL string object */ |
| 292 | |
| 293 | new_object = acpi_ut_create_string_object(0); |
| 294 | if (!new_object) { |
| 295 | return (AE_NO_MEMORY); |
| 296 | } |
| 297 | } else { |
| 298 | status = |
| 299 | acpi_ex_convert_to_string(original_object, |
| 300 | &new_object, |
| 301 | ACPI_IMPLICIT_CONVERT_HEX); |
| 302 | if (ACPI_FAILURE(status)) { |
| 303 | return (status); |
| 304 | } |
| 305 | } |
| 306 | break; |
| 307 | |
| 308 | case ACPI_TYPE_BUFFER: |
| 309 | /* |
| 310 | * Buffer-to-String conversion. Use a to_string |
| 311 | * conversion, no transform performed on the buffer data. The best |
| 312 | * example of this is the _BIF method, where the string data from |
| 313 | * the battery is often (incorrectly) returned as buffer object(s). |
| 314 | */ |
| 315 | length = 0; |
| 316 | while ((length < original_object->buffer.length) && |
| 317 | (original_object->buffer.pointer[length])) { |
| 318 | length++; |
| 319 | } |
| 320 | |
| 321 | /* Allocate a new string object */ |
| 322 | |
| 323 | new_object = acpi_ut_create_string_object(length); |
| 324 | if (!new_object) { |
| 325 | return (AE_NO_MEMORY); |
| 326 | } |
| 327 | |
| 328 | /* |
| 329 | * Copy the raw buffer data with no transform. String is already NULL |
| 330 | * terminated at Length+1. |
| 331 | */ |
| 332 | ACPI_MEMCPY(new_object->string.pointer, |
| 333 | original_object->buffer.pointer, length); |
| 334 | break; |
| 335 | |
| 336 | default: |
| 337 | return (AE_AML_OPERAND_TYPE); |
| 338 | } |
| 339 | |
| 340 | *return_object = new_object; |
| 341 | return (AE_OK); |
| 342 | } |
| 343 | |
| 344 | /******************************************************************************* |
| 345 | * |
| 346 | * FUNCTION: acpi_ns_convert_to_buffer |
| 347 | * |
| 348 | * PARAMETERS: original_object - Object to be converted |
| 349 | * return_object - Where the new converted object is returned |
| 350 | * |
| 351 | * RETURN: Status. AE_OK if conversion was successful. |
| 352 | * |
Bob Moore | ea7c5ec | 2009-12-11 15:18:52 +0800 | [diff] [blame^] | 353 | * DESCRIPTION: Attempt to convert a Integer/String/Package object to a Buffer. |
Bob Moore | 47e11d5 | 2009-12-11 15:01:12 +0800 | [diff] [blame] | 354 | * |
| 355 | ******************************************************************************/ |
| 356 | |
| 357 | static acpi_status |
| 358 | acpi_ns_convert_to_buffer(union acpi_operand_object *original_object, |
| 359 | union acpi_operand_object **return_object) |
| 360 | { |
| 361 | union acpi_operand_object *new_object; |
| 362 | acpi_status status; |
Bob Moore | ea7c5ec | 2009-12-11 15:18:52 +0800 | [diff] [blame^] | 363 | union acpi_operand_object **elements; |
| 364 | u32 *dword_buffer; |
| 365 | u32 count; |
| 366 | u32 i; |
Bob Moore | 47e11d5 | 2009-12-11 15:01:12 +0800 | [diff] [blame] | 367 | |
| 368 | switch (original_object->common.type) { |
| 369 | case ACPI_TYPE_INTEGER: |
| 370 | /* |
| 371 | * Integer-to-Buffer conversion. |
| 372 | * Convert the Integer to a packed-byte buffer. _MAT and other |
| 373 | * objects need this sometimes, if a read has been performed on a |
| 374 | * Field object that is less than or equal to the global integer |
| 375 | * size (32 or 64 bits). |
| 376 | */ |
| 377 | status = |
| 378 | acpi_ex_convert_to_buffer(original_object, &new_object); |
| 379 | if (ACPI_FAILURE(status)) { |
| 380 | return (status); |
| 381 | } |
| 382 | break; |
| 383 | |
| 384 | case ACPI_TYPE_STRING: |
| 385 | |
| 386 | /* String-to-Buffer conversion. Simple data copy */ |
| 387 | |
| 388 | new_object = |
| 389 | acpi_ut_create_buffer_object(original_object->string. |
| 390 | length); |
| 391 | if (!new_object) { |
| 392 | return (AE_NO_MEMORY); |
| 393 | } |
| 394 | |
| 395 | ACPI_MEMCPY(new_object->buffer.pointer, |
| 396 | original_object->string.pointer, |
| 397 | original_object->string.length); |
| 398 | break; |
| 399 | |
Bob Moore | ea7c5ec | 2009-12-11 15:18:52 +0800 | [diff] [blame^] | 400 | case ACPI_TYPE_PACKAGE: |
| 401 | |
| 402 | /* All elements of the Package must be integers */ |
| 403 | |
| 404 | elements = original_object->package.elements; |
| 405 | count = original_object->package.count; |
| 406 | |
| 407 | for (i = 0; i < count; i++) { |
| 408 | if ((!*elements) || |
| 409 | ((*elements)->common.type != ACPI_TYPE_INTEGER)) { |
| 410 | return (AE_AML_OPERAND_TYPE); |
| 411 | } |
| 412 | elements++; |
| 413 | } |
| 414 | |
| 415 | /* Create the new buffer object to replace the Package */ |
| 416 | |
| 417 | new_object = acpi_ut_create_buffer_object(ACPI_MUL_4(count)); |
| 418 | if (!new_object) { |
| 419 | return (AE_NO_MEMORY); |
| 420 | } |
| 421 | |
| 422 | /* Copy the package elements (integers) to the buffer as DWORDs */ |
| 423 | |
| 424 | elements = original_object->package.elements; |
| 425 | dword_buffer = ACPI_CAST_PTR(u32, new_object->buffer.pointer); |
| 426 | |
| 427 | for (i = 0; i < count; i++) { |
| 428 | *dword_buffer = (u32) (*elements)->integer.value; |
| 429 | dword_buffer++; |
| 430 | elements++; |
| 431 | } |
| 432 | break; |
| 433 | |
Bob Moore | 47e11d5 | 2009-12-11 15:01:12 +0800 | [diff] [blame] | 434 | default: |
| 435 | return (AE_AML_OPERAND_TYPE); |
| 436 | } |
| 437 | |
| 438 | *return_object = new_object; |
| 439 | return (AE_OK); |
| 440 | } |
| 441 | |
| 442 | /******************************************************************************* |
| 443 | * |
| 444 | * FUNCTION: acpi_ns_convert_to_package |
| 445 | * |
| 446 | * PARAMETERS: original_object - Object to be converted |
| 447 | * return_object - Where the new converted object is returned |
| 448 | * |
| 449 | * RETURN: Status. AE_OK if conversion was successful. |
| 450 | * |
| 451 | * DESCRIPTION: Attempt to convert a Buffer object to a Package. Each byte of |
| 452 | * the buffer is converted to a single integer package element. |
| 453 | * |
| 454 | ******************************************************************************/ |
| 455 | |
| 456 | static acpi_status |
| 457 | acpi_ns_convert_to_package(union acpi_operand_object *original_object, |
| 458 | union acpi_operand_object **return_object) |
| 459 | { |
| 460 | union acpi_operand_object *new_object; |
| 461 | union acpi_operand_object **elements; |
| 462 | u32 length; |
| 463 | u8 *buffer; |
| 464 | |
| 465 | switch (original_object->common.type) { |
| 466 | case ACPI_TYPE_BUFFER: |
| 467 | |
| 468 | /* Buffer-to-Package conversion */ |
| 469 | |
| 470 | length = original_object->buffer.length; |
| 471 | new_object = acpi_ut_create_package_object(length); |
| 472 | if (!new_object) { |
| 473 | return (AE_NO_MEMORY); |
| 474 | } |
| 475 | |
| 476 | /* Convert each buffer byte to an integer package element */ |
| 477 | |
| 478 | elements = new_object->package.elements; |
| 479 | buffer = original_object->buffer.pointer; |
| 480 | |
| 481 | while (length--) { |
Bob Moore | ea7c5ec | 2009-12-11 15:18:52 +0800 | [diff] [blame^] | 482 | *elements = |
| 483 | acpi_ut_create_integer_object((u64) *buffer); |
Bob Moore | 47e11d5 | 2009-12-11 15:01:12 +0800 | [diff] [blame] | 484 | if (!*elements) { |
| 485 | acpi_ut_remove_reference(new_object); |
| 486 | return (AE_NO_MEMORY); |
| 487 | } |
| 488 | elements++; |
| 489 | buffer++; |
| 490 | } |
| 491 | break; |
| 492 | |
| 493 | default: |
| 494 | return (AE_AML_OPERAND_TYPE); |
| 495 | } |
| 496 | |
| 497 | *return_object = new_object; |
| 498 | return (AE_OK); |
| 499 | } |
| 500 | |
| 501 | /******************************************************************************* |
| 502 | * |
Bob Moore | e5f69d6 | 2009-07-24 11:03:09 +0800 | [diff] [blame] | 503 | * FUNCTION: acpi_ns_repair_package_list |
| 504 | * |
| 505 | * PARAMETERS: Data - Pointer to validation data structure |
| 506 | * obj_desc_ptr - Pointer to the object to repair. The new |
| 507 | * package object is returned here, |
| 508 | * overwriting the old object. |
| 509 | * |
| 510 | * RETURN: Status, new object in *obj_desc_ptr |
| 511 | * |
| 512 | * DESCRIPTION: Repair a common problem with objects that are defined to return |
| 513 | * a variable-length Package of Packages. If the variable-length |
| 514 | * is one, some BIOS code mistakenly simply declares a single |
| 515 | * Package instead of a Package with one sub-Package. This |
| 516 | * function attempts to repair this error by wrapping a Package |
| 517 | * object around the original Package, creating the correct |
| 518 | * Package with one sub-Package. |
| 519 | * |
| 520 | * Names that can be repaired in this manner include: |
| 521 | * _ALR, _CSD, _HPX, _MLS, _PRT, _PSS, _TRT, TSS |
| 522 | * |
| 523 | ******************************************************************************/ |
| 524 | |
| 525 | acpi_status |
| 526 | acpi_ns_repair_package_list(struct acpi_predefined_data *data, |
| 527 | union acpi_operand_object **obj_desc_ptr) |
| 528 | { |
| 529 | union acpi_operand_object *pkg_obj_desc; |
| 530 | |
| 531 | /* |
| 532 | * Create the new outer package and populate it. The new package will |
| 533 | * have a single element, the lone subpackage. |
| 534 | */ |
| 535 | pkg_obj_desc = acpi_ut_create_package_object(1); |
| 536 | if (!pkg_obj_desc) { |
| 537 | return (AE_NO_MEMORY); |
| 538 | } |
| 539 | |
| 540 | pkg_obj_desc->package.elements[0] = *obj_desc_ptr; |
| 541 | |
| 542 | /* Return the new object in the object pointer */ |
| 543 | |
| 544 | *obj_desc_ptr = pkg_obj_desc; |
| 545 | data->flags |= ACPI_OBJECT_REPAIRED; |
| 546 | |
Bob Moore | 7df200c | 2009-11-12 09:18:45 +0800 | [diff] [blame] | 547 | ACPI_INFO_PREDEFINED((AE_INFO, data->pathname, data->node_flags, |
| 548 | "Repaired Incorrectly formed Package")); |
Bob Moore | e5f69d6 | 2009-07-24 11:03:09 +0800 | [diff] [blame] | 549 | |
| 550 | return (AE_OK); |
| 551 | } |