| 1 | /****************************************************************************** |
| 2 | * |
| 3 | * Module Name: nsrepair - Repair for objects returned by predefined methods |
| 4 | * |
| 5 | *****************************************************************************/ |
| 6 | |
| 7 | /* |
| 8 | * Copyright (C) 2000 - 2016, 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.h" |
| 45 | #include "accommon.h" |
| 46 | #include "acnamesp.h" |
| 47 | #include "acinterp.h" |
| 48 | #include "acpredef.h" |
| 49 | #include "amlresrc.h" |
| 50 | |
| 51 | #define _COMPONENT ACPI_NAMESPACE |
| 52 | ACPI_MODULE_NAME ("nsrepair" ) |
| 53 | |
| 54 | |
| 55 | /******************************************************************************* |
| 56 | * |
| 57 | * This module attempts to repair or convert objects returned by the |
| 58 | * predefined methods to an object type that is expected, as per the ACPI |
| 59 | * specification. The need for this code is dictated by the many machines that |
| 60 | * return incorrect types for the standard predefined methods. Performing these |
| 61 | * conversions here, in one place, eliminates the need for individual ACPI |
| 62 | * device drivers to do the same. Note: Most of these conversions are different |
| 63 | * than the internal object conversion routines used for implicit object |
| 64 | * conversion. |
| 65 | * |
| 66 | * The following conversions can be performed as necessary: |
| 67 | * |
| 68 | * Integer -> String |
| 69 | * Integer -> Buffer |
| 70 | * String -> Integer |
| 71 | * String -> Buffer |
| 72 | * Buffer -> Integer |
| 73 | * Buffer -> String |
| 74 | * Buffer -> Package of Integers |
| 75 | * Package -> Package of one Package |
| 76 | * |
| 77 | * Additional conversions that are available: |
| 78 | * Convert a null return or zero return value to an EndTag descriptor |
| 79 | * Convert an ASCII string to a Unicode buffer |
| 80 | * |
| 81 | * An incorrect standalone object is wrapped with required outer package |
| 82 | * |
| 83 | * Additional possible repairs: |
| 84 | * Required package elements that are NULL replaced by Integer/String/Buffer |
| 85 | * |
| 86 | ******************************************************************************/ |
| 87 | |
| 88 | |
| 89 | /* Local prototypes */ |
| 90 | |
| 91 | static const ACPI_SIMPLE_REPAIR_INFO * |
| 92 | AcpiNsMatchSimpleRepair ( |
| 93 | ACPI_NAMESPACE_NODE *Node, |
| 94 | UINT32 ReturnBtype, |
| 95 | UINT32 PackageIndex); |
| 96 | |
| 97 | |
| 98 | /* |
| 99 | * Special but simple repairs for some names. |
| 100 | * |
| 101 | * 2nd argument: Unexpected types that can be repaired |
| 102 | */ |
| 103 | static const ACPI_SIMPLE_REPAIR_INFO AcpiObjectRepairInfo[] = |
| 104 | { |
| 105 | /* Resource descriptor conversions */ |
| 106 | |
| 107 | { "_CRS" , ACPI_RTYPE_INTEGER | ACPI_RTYPE_STRING | ACPI_RTYPE_BUFFER | ACPI_RTYPE_NONE, |
| 108 | ACPI_NOT_PACKAGE_ELEMENT, |
| 109 | AcpiNsConvertToResource }, |
| 110 | { "_DMA" , ACPI_RTYPE_INTEGER | ACPI_RTYPE_STRING | ACPI_RTYPE_BUFFER | ACPI_RTYPE_NONE, |
| 111 | ACPI_NOT_PACKAGE_ELEMENT, |
| 112 | AcpiNsConvertToResource }, |
| 113 | { "_PRS" , ACPI_RTYPE_INTEGER | ACPI_RTYPE_STRING | ACPI_RTYPE_BUFFER | ACPI_RTYPE_NONE, |
| 114 | ACPI_NOT_PACKAGE_ELEMENT, |
| 115 | AcpiNsConvertToResource }, |
| 116 | |
| 117 | /* Object reference conversions */ |
| 118 | |
| 119 | { "_DEP" , ACPI_RTYPE_STRING, ACPI_ALL_PACKAGE_ELEMENTS, |
| 120 | AcpiNsConvertToReference }, |
| 121 | |
| 122 | /* Unicode conversions */ |
| 123 | |
| 124 | { "_MLS" , ACPI_RTYPE_STRING, 1, |
| 125 | AcpiNsConvertToUnicode }, |
| 126 | { "_STR" , ACPI_RTYPE_STRING | ACPI_RTYPE_BUFFER, |
| 127 | ACPI_NOT_PACKAGE_ELEMENT, |
| 128 | AcpiNsConvertToUnicode }, |
| 129 | { {0,0,0,0}, 0, 0, NULL } /* Table terminator */ |
| 130 | }; |
| 131 | |
| 132 | |
| 133 | /******************************************************************************* |
| 134 | * |
| 135 | * FUNCTION: AcpiNsSimpleRepair |
| 136 | * |
| 137 | * PARAMETERS: Info - Method execution information block |
| 138 | * ExpectedBtypes - Object types expected |
| 139 | * PackageIndex - Index of object within parent package (if |
| 140 | * applicable - ACPI_NOT_PACKAGE_ELEMENT |
| 141 | * otherwise) |
| 142 | * ReturnObjectPtr - Pointer to the object returned from the |
| 143 | * evaluation of a method or object |
| 144 | * |
| 145 | * RETURN: Status. AE_OK if repair was successful. |
| 146 | * |
| 147 | * DESCRIPTION: Attempt to repair/convert a return object of a type that was |
| 148 | * not expected. |
| 149 | * |
| 150 | ******************************************************************************/ |
| 151 | |
| 152 | ACPI_STATUS |
| 153 | AcpiNsSimpleRepair ( |
| 154 | ACPI_EVALUATE_INFO *Info, |
| 155 | UINT32 ExpectedBtypes, |
| 156 | UINT32 PackageIndex, |
| 157 | ACPI_OPERAND_OBJECT **ReturnObjectPtr) |
| 158 | { |
| 159 | ACPI_OPERAND_OBJECT *ReturnObject = *ReturnObjectPtr; |
| 160 | ACPI_OPERAND_OBJECT *NewObject = NULL; |
| 161 | ACPI_STATUS Status; |
| 162 | const ACPI_SIMPLE_REPAIR_INFO *Predefined; |
| 163 | |
| 164 | |
| 165 | ACPI_FUNCTION_NAME (NsSimpleRepair); |
| 166 | |
| 167 | |
| 168 | /* |
| 169 | * Special repairs for certain names that are in the repair table. |
| 170 | * Check if this name is in the list of repairable names. |
| 171 | */ |
| 172 | Predefined = AcpiNsMatchSimpleRepair (Info->Node, |
| 173 | Info->ReturnBtype, PackageIndex); |
| 174 | if (Predefined) |
| 175 | { |
| 176 | if (!ReturnObject) |
| 177 | { |
| 178 | ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, |
| 179 | ACPI_WARN_ALWAYS, "Missing expected return value" )); |
| 180 | } |
| 181 | |
| 182 | Status = Predefined->ObjectConverter (Info->Node, ReturnObject, |
| 183 | &NewObject); |
| 184 | if (ACPI_FAILURE (Status)) |
| 185 | { |
| 186 | /* A fatal error occurred during a conversion */ |
| 187 | |
| 188 | ACPI_EXCEPTION ((AE_INFO, Status, |
| 189 | "During return object analysis" )); |
| 190 | return (Status); |
| 191 | } |
| 192 | if (NewObject) |
| 193 | { |
| 194 | goto ObjectRepaired; |
| 195 | } |
| 196 | } |
| 197 | |
| 198 | /* |
| 199 | * Do not perform simple object repair unless the return type is not |
| 200 | * expected. |
| 201 | */ |
| 202 | if (Info->ReturnBtype & ExpectedBtypes) |
| 203 | { |
| 204 | return (AE_OK); |
| 205 | } |
| 206 | |
| 207 | /* |
| 208 | * At this point, we know that the type of the returned object was not |
| 209 | * one of the expected types for this predefined name. Attempt to |
| 210 | * repair the object by converting it to one of the expected object |
| 211 | * types for this predefined name. |
| 212 | */ |
| 213 | |
| 214 | /* |
| 215 | * If there is no return value, check if we require a return value for |
| 216 | * this predefined name. Either one return value is expected, or none, |
| 217 | * for both methods and other objects. |
| 218 | * |
| 219 | * Try to fix if there was no return object. Warning if failed to fix. |
| 220 | */ |
| 221 | if (!ReturnObject) |
| 222 | { |
| 223 | if (ExpectedBtypes && (!(ExpectedBtypes & ACPI_RTYPE_NONE))) |
| 224 | { |
| 225 | if (PackageIndex != ACPI_NOT_PACKAGE_ELEMENT) |
| 226 | { |
| 227 | ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, |
| 228 | ACPI_WARN_ALWAYS, "Found unexpected NULL package element" )); |
| 229 | |
| 230 | Status = AcpiNsRepairNullElement (Info, ExpectedBtypes, |
| 231 | PackageIndex, ReturnObjectPtr); |
| 232 | if (ACPI_SUCCESS (Status)) |
| 233 | { |
| 234 | return (AE_OK); /* Repair was successful */ |
| 235 | } |
| 236 | } |
| 237 | else |
| 238 | { |
| 239 | ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, |
| 240 | ACPI_WARN_ALWAYS, "Missing expected return value" )); |
| 241 | } |
| 242 | |
| 243 | return (AE_AML_NO_RETURN_VALUE); |
| 244 | } |
| 245 | } |
| 246 | |
| 247 | if (ExpectedBtypes & ACPI_RTYPE_INTEGER) |
| 248 | { |
| 249 | Status = AcpiNsConvertToInteger (ReturnObject, &NewObject); |
| 250 | if (ACPI_SUCCESS (Status)) |
| 251 | { |
| 252 | goto ObjectRepaired; |
| 253 | } |
| 254 | } |
| 255 | if (ExpectedBtypes & ACPI_RTYPE_STRING) |
| 256 | { |
| 257 | Status = AcpiNsConvertToString (ReturnObject, &NewObject); |
| 258 | if (ACPI_SUCCESS (Status)) |
| 259 | { |
| 260 | goto ObjectRepaired; |
| 261 | } |
| 262 | } |
| 263 | if (ExpectedBtypes & ACPI_RTYPE_BUFFER) |
| 264 | { |
| 265 | Status = AcpiNsConvertToBuffer (ReturnObject, &NewObject); |
| 266 | if (ACPI_SUCCESS (Status)) |
| 267 | { |
| 268 | goto ObjectRepaired; |
| 269 | } |
| 270 | } |
| 271 | if (ExpectedBtypes & ACPI_RTYPE_PACKAGE) |
| 272 | { |
| 273 | /* |
| 274 | * A package is expected. We will wrap the existing object with a |
| 275 | * new package object. It is often the case that if a variable-length |
| 276 | * package is required, but there is only a single object needed, the |
| 277 | * BIOS will return that object instead of wrapping it with a Package |
| 278 | * object. Note: after the wrapping, the package will be validated |
| 279 | * for correct contents (expected object type or types). |
| 280 | */ |
| 281 | Status = AcpiNsWrapWithPackage (Info, ReturnObject, &NewObject); |
| 282 | if (ACPI_SUCCESS (Status)) |
| 283 | { |
| 284 | /* |
| 285 | * The original object just had its reference count |
| 286 | * incremented for being inserted into the new package. |
| 287 | */ |
| 288 | *ReturnObjectPtr = NewObject; /* New Package object */ |
| 289 | Info->ReturnFlags |= ACPI_OBJECT_REPAIRED; |
| 290 | return (AE_OK); |
| 291 | } |
| 292 | } |
| 293 | |
| 294 | /* We cannot repair this object */ |
| 295 | |
| 296 | return (AE_AML_OPERAND_TYPE); |
| 297 | |
| 298 | |
| 299 | ObjectRepaired: |
| 300 | |
| 301 | /* Object was successfully repaired */ |
| 302 | |
| 303 | if (PackageIndex != ACPI_NOT_PACKAGE_ELEMENT) |
| 304 | { |
| 305 | /* |
| 306 | * The original object is a package element. We need to |
| 307 | * decrement the reference count of the original object, |
| 308 | * for removing it from the package. |
| 309 | * |
| 310 | * However, if the original object was just wrapped with a |
| 311 | * package object as part of the repair, we don't need to |
| 312 | * change the reference count. |
| 313 | */ |
| 314 | if (!(Info->ReturnFlags & ACPI_OBJECT_WRAPPED)) |
| 315 | { |
| 316 | NewObject->Common.ReferenceCount = |
| 317 | ReturnObject->Common.ReferenceCount; |
| 318 | |
| 319 | if (ReturnObject->Common.ReferenceCount > 1) |
| 320 | { |
| 321 | ReturnObject->Common.ReferenceCount--; |
| 322 | } |
| 323 | } |
| 324 | |
| 325 | ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR, |
| 326 | "%s: Converted %s to expected %s at Package index %u\n" , |
| 327 | Info->FullPathname, AcpiUtGetObjectTypeName (ReturnObject), |
| 328 | AcpiUtGetObjectTypeName (NewObject), PackageIndex)); |
| 329 | } |
| 330 | else |
| 331 | { |
| 332 | ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR, |
| 333 | "%s: Converted %s to expected %s\n" , |
| 334 | Info->FullPathname, AcpiUtGetObjectTypeName (ReturnObject), |
| 335 | AcpiUtGetObjectTypeName (NewObject))); |
| 336 | } |
| 337 | |
| 338 | /* Delete old object, install the new return object */ |
| 339 | |
| 340 | AcpiUtRemoveReference (ReturnObject); |
| 341 | *ReturnObjectPtr = NewObject; |
| 342 | Info->ReturnFlags |= ACPI_OBJECT_REPAIRED; |
| 343 | return (AE_OK); |
| 344 | } |
| 345 | |
| 346 | |
| 347 | /****************************************************************************** |
| 348 | * |
| 349 | * FUNCTION: AcpiNsMatchSimpleRepair |
| 350 | * |
| 351 | * PARAMETERS: Node - Namespace node for the method/object |
| 352 | * ReturnBtype - Object type that was returned |
| 353 | * PackageIndex - Index of object within parent package (if |
| 354 | * applicable - ACPI_NOT_PACKAGE_ELEMENT |
| 355 | * otherwise) |
| 356 | * |
| 357 | * RETURN: Pointer to entry in repair table. NULL indicates not found. |
| 358 | * |
| 359 | * DESCRIPTION: Check an object name against the repairable object list. |
| 360 | * |
| 361 | *****************************************************************************/ |
| 362 | |
| 363 | static const ACPI_SIMPLE_REPAIR_INFO * |
| 364 | AcpiNsMatchSimpleRepair ( |
| 365 | ACPI_NAMESPACE_NODE *Node, |
| 366 | UINT32 ReturnBtype, |
| 367 | UINT32 PackageIndex) |
| 368 | { |
| 369 | const ACPI_SIMPLE_REPAIR_INFO *ThisName; |
| 370 | |
| 371 | |
| 372 | /* Search info table for a repairable predefined method/object name */ |
| 373 | |
| 374 | ThisName = AcpiObjectRepairInfo; |
| 375 | while (ThisName->ObjectConverter) |
| 376 | { |
| 377 | if (ACPI_COMPARE_NAME (Node->Name.Ascii, ThisName->Name)) |
| 378 | { |
| 379 | /* Check if we can actually repair this name/type combination */ |
| 380 | |
| 381 | if ((ReturnBtype & ThisName->UnexpectedBtypes) && |
| 382 | (ThisName->PackageIndex == ACPI_ALL_PACKAGE_ELEMENTS || |
| 383 | PackageIndex == ThisName->PackageIndex)) |
| 384 | { |
| 385 | return (ThisName); |
| 386 | } |
| 387 | |
| 388 | return (NULL); |
| 389 | } |
| 390 | |
| 391 | ThisName++; |
| 392 | } |
| 393 | |
| 394 | return (NULL); /* Name was not found in the repair table */ |
| 395 | } |
| 396 | |
| 397 | |
| 398 | /******************************************************************************* |
| 399 | * |
| 400 | * FUNCTION: AcpiNsRepairNullElement |
| 401 | * |
| 402 | * PARAMETERS: Info - Method execution information block |
| 403 | * ExpectedBtypes - Object types expected |
| 404 | * PackageIndex - Index of object within parent package (if |
| 405 | * applicable - ACPI_NOT_PACKAGE_ELEMENT |
| 406 | * otherwise) |
| 407 | * ReturnObjectPtr - Pointer to the object returned from the |
| 408 | * evaluation of a method or object |
| 409 | * |
| 410 | * RETURN: Status. AE_OK if repair was successful. |
| 411 | * |
| 412 | * DESCRIPTION: Attempt to repair a NULL element of a returned Package object. |
| 413 | * |
| 414 | ******************************************************************************/ |
| 415 | |
| 416 | ACPI_STATUS |
| 417 | AcpiNsRepairNullElement ( |
| 418 | ACPI_EVALUATE_INFO *Info, |
| 419 | UINT32 ExpectedBtypes, |
| 420 | UINT32 PackageIndex, |
| 421 | ACPI_OPERAND_OBJECT **ReturnObjectPtr) |
| 422 | { |
| 423 | ACPI_OPERAND_OBJECT *ReturnObject = *ReturnObjectPtr; |
| 424 | ACPI_OPERAND_OBJECT *NewObject; |
| 425 | |
| 426 | |
| 427 | ACPI_FUNCTION_NAME (NsRepairNullElement); |
| 428 | |
| 429 | |
| 430 | /* No repair needed if return object is non-NULL */ |
| 431 | |
| 432 | if (ReturnObject) |
| 433 | { |
| 434 | return (AE_OK); |
| 435 | } |
| 436 | |
| 437 | /* |
| 438 | * Attempt to repair a NULL element of a Package object. This applies to |
| 439 | * predefined names that return a fixed-length package and each element |
| 440 | * is required. It does not apply to variable-length packages where NULL |
| 441 | * elements are allowed, especially at the end of the package. |
| 442 | */ |
| 443 | if (ExpectedBtypes & ACPI_RTYPE_INTEGER) |
| 444 | { |
| 445 | /* Need an Integer - create a zero-value integer */ |
| 446 | |
| 447 | NewObject = AcpiUtCreateIntegerObject ((UINT64) 0); |
| 448 | } |
| 449 | else if (ExpectedBtypes & ACPI_RTYPE_STRING) |
| 450 | { |
| 451 | /* Need a String - create a NULL string */ |
| 452 | |
| 453 | NewObject = AcpiUtCreateStringObject (0); |
| 454 | } |
| 455 | else if (ExpectedBtypes & ACPI_RTYPE_BUFFER) |
| 456 | { |
| 457 | /* Need a Buffer - create a zero-length buffer */ |
| 458 | |
| 459 | NewObject = AcpiUtCreateBufferObject (0); |
| 460 | } |
| 461 | else |
| 462 | { |
| 463 | /* Error for all other expected types */ |
| 464 | |
| 465 | return (AE_AML_OPERAND_TYPE); |
| 466 | } |
| 467 | |
| 468 | if (!NewObject) |
| 469 | { |
| 470 | return (AE_NO_MEMORY); |
| 471 | } |
| 472 | |
| 473 | /* Set the reference count according to the parent Package object */ |
| 474 | |
| 475 | NewObject->Common.ReferenceCount = |
| 476 | Info->ParentPackage->Common.ReferenceCount; |
| 477 | |
| 478 | ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR, |
| 479 | "%s: Converted NULL package element to expected %s at index %u\n" , |
| 480 | Info->FullPathname, AcpiUtGetObjectTypeName (NewObject), |
| 481 | PackageIndex)); |
| 482 | |
| 483 | *ReturnObjectPtr = NewObject; |
| 484 | Info->ReturnFlags |= ACPI_OBJECT_REPAIRED; |
| 485 | return (AE_OK); |
| 486 | } |
| 487 | |
| 488 | |
| 489 | /****************************************************************************** |
| 490 | * |
| 491 | * FUNCTION: AcpiNsRemoveNullElements |
| 492 | * |
| 493 | * PARAMETERS: Info - Method execution information block |
| 494 | * PackageType - An AcpiReturnPackageTypes value |
| 495 | * ObjDesc - A Package object |
| 496 | * |
| 497 | * RETURN: None. |
| 498 | * |
| 499 | * DESCRIPTION: Remove all NULL package elements from packages that contain |
| 500 | * a variable number of subpackages. For these types of |
| 501 | * packages, NULL elements can be safely removed. |
| 502 | * |
| 503 | *****************************************************************************/ |
| 504 | |
| 505 | void |
| 506 | AcpiNsRemoveNullElements ( |
| 507 | ACPI_EVALUATE_INFO *Info, |
| 508 | UINT8 PackageType, |
| 509 | ACPI_OPERAND_OBJECT *ObjDesc) |
| 510 | { |
| 511 | ACPI_OPERAND_OBJECT **Source; |
| 512 | ACPI_OPERAND_OBJECT **Dest; |
| 513 | UINT32 Count; |
| 514 | UINT32 NewCount; |
| 515 | UINT32 i; |
| 516 | |
| 517 | |
| 518 | ACPI_FUNCTION_NAME (NsRemoveNullElements); |
| 519 | |
| 520 | |
| 521 | /* |
| 522 | * We can safely remove all NULL elements from these package types: |
| 523 | * PTYPE1_VAR packages contain a variable number of simple data types. |
| 524 | * PTYPE2 packages contain a variable number of subpackages. |
| 525 | */ |
| 526 | switch (PackageType) |
| 527 | { |
| 528 | case ACPI_PTYPE1_VAR: |
| 529 | case ACPI_PTYPE2: |
| 530 | case ACPI_PTYPE2_COUNT: |
| 531 | case ACPI_PTYPE2_PKG_COUNT: |
| 532 | case ACPI_PTYPE2_FIXED: |
| 533 | case ACPI_PTYPE2_MIN: |
| 534 | case ACPI_PTYPE2_REV_FIXED: |
| 535 | case ACPI_PTYPE2_FIX_VAR: |
| 536 | break; |
| 537 | |
| 538 | default: |
| 539 | case ACPI_PTYPE2_VAR_VAR: |
| 540 | case ACPI_PTYPE1_FIXED: |
| 541 | case ACPI_PTYPE1_OPTION: |
| 542 | return; |
| 543 | } |
| 544 | |
| 545 | Count = ObjDesc->Package.Count; |
| 546 | NewCount = Count; |
| 547 | |
| 548 | Source = ObjDesc->Package.Elements; |
| 549 | Dest = Source; |
| 550 | |
| 551 | /* Examine all elements of the package object, remove nulls */ |
| 552 | |
| 553 | for (i = 0; i < Count; i++) |
| 554 | { |
| 555 | if (!*Source) |
| 556 | { |
| 557 | NewCount--; |
| 558 | } |
| 559 | else |
| 560 | { |
| 561 | *Dest = *Source; |
| 562 | Dest++; |
| 563 | } |
| 564 | |
| 565 | Source++; |
| 566 | } |
| 567 | |
| 568 | /* Update parent package if any null elements were removed */ |
| 569 | |
| 570 | if (NewCount < Count) |
| 571 | { |
| 572 | ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR, |
| 573 | "%s: Found and removed %u NULL elements\n" , |
| 574 | Info->FullPathname, (Count - NewCount))); |
| 575 | |
| 576 | /* NULL terminate list and update the package count */ |
| 577 | |
| 578 | *Dest = NULL; |
| 579 | ObjDesc->Package.Count = NewCount; |
| 580 | } |
| 581 | } |
| 582 | |
| 583 | |
| 584 | /******************************************************************************* |
| 585 | * |
| 586 | * FUNCTION: AcpiNsWrapWithPackage |
| 587 | * |
| 588 | * PARAMETERS: Info - Method execution information block |
| 589 | * OriginalObject - Pointer to the object to repair. |
| 590 | * ObjDescPtr - The new package object is returned here |
| 591 | * |
| 592 | * RETURN: Status, new object in *ObjDescPtr |
| 593 | * |
| 594 | * DESCRIPTION: Repair a common problem with objects that are defined to |
| 595 | * return a variable-length Package of sub-objects. If there is |
| 596 | * only one sub-object, some BIOS code mistakenly simply declares |
| 597 | * the single object instead of a Package with one sub-object. |
| 598 | * This function attempts to repair this error by wrapping a |
| 599 | * Package object around the original object, creating the |
| 600 | * correct and expected Package with one sub-object. |
| 601 | * |
| 602 | * Names that can be repaired in this manner include: |
| 603 | * _ALR, _CSD, _HPX, _MLS, _PLD, _PRT, _PSS, _TRT, _TSS, |
| 604 | * _BCL, _DOD, _FIX, _Sx |
| 605 | * |
| 606 | ******************************************************************************/ |
| 607 | |
| 608 | ACPI_STATUS |
| 609 | AcpiNsWrapWithPackage ( |
| 610 | ACPI_EVALUATE_INFO *Info, |
| 611 | ACPI_OPERAND_OBJECT *OriginalObject, |
| 612 | ACPI_OPERAND_OBJECT **ObjDescPtr) |
| 613 | { |
| 614 | ACPI_OPERAND_OBJECT *PkgObjDesc; |
| 615 | |
| 616 | |
| 617 | ACPI_FUNCTION_NAME (NsWrapWithPackage); |
| 618 | |
| 619 | |
| 620 | /* |
| 621 | * Create the new outer package and populate it. The new |
| 622 | * package will have a single element, the lone sub-object. |
| 623 | */ |
| 624 | PkgObjDesc = AcpiUtCreatePackageObject (1); |
| 625 | if (!PkgObjDesc) |
| 626 | { |
| 627 | return (AE_NO_MEMORY); |
| 628 | } |
| 629 | |
| 630 | PkgObjDesc->Package.Elements[0] = OriginalObject; |
| 631 | |
| 632 | ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR, |
| 633 | "%s: Wrapped %s with expected Package object\n" , |
| 634 | Info->FullPathname, AcpiUtGetObjectTypeName (OriginalObject))); |
| 635 | |
| 636 | /* Return the new object in the object pointer */ |
| 637 | |
| 638 | *ObjDescPtr = PkgObjDesc; |
| 639 | Info->ReturnFlags |= ACPI_OBJECT_REPAIRED | ACPI_OBJECT_WRAPPED; |
| 640 | return (AE_OK); |
| 641 | } |
| 642 | |