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 /******************************************************************************
  *
  * Module Name: nsrepair - Repair for objects returned by predefined methods
  *
  *****************************************************************************/
 
 /******************************************************************************
  *
  * 1. Copyright Notice
  *
  * Some or all of this work - Copyright (c) 1999 - 2024, Intel Corp.
  * All rights reserved.
  *
  * 2. License
  *
  * 2.1. This is your license from Intel Corp. under its intellectual property
  * rights. You may have additional license terms from the party that provided
  * you this software, covering your right to use that party's intellectual
  * property rights.
  *
  * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
  * copy of the source code appearing in this file ("Covered Code") an
  * irrevocable, perpetual, worldwide license under Intel's copyrights in the
  * base code distributed originally by Intel ("Original Intel Code") to copy,
  * make derivatives, distribute, use and display any portion of the Covered
  * Code in any form, with the right to sublicense such rights; and
  *
  * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
  * license (with the right to sublicense), under only those claims of Intel
  * patents that are infringed by the Original Intel Code, to make, use, sell,
  * offer to sell, and import the Covered Code and derivative works thereof
  * solely to the minimum extent necessary to exercise the above copyright
  * license, and in no event shall the patent license extend to any additions
  * to or modifications of the Original Intel Code. No other license or right
  * is granted directly or by implication, estoppel or otherwise;
  *
  * The above copyright and patent license is granted only if the following
  * conditions are met:
  *
  * 3. Conditions
  *
  * 3.1. Redistribution of Source with Rights to Further Distribute Source.
  * Redistribution of source code of any substantial portion of the Covered
  * Code or modification with rights to further distribute source must include
  * the above Copyright Notice, the above License, this list of Conditions,
  * and the following Disclaimer and Export Compliance provision. In addition,
  * Licensee must cause all Covered Code to which Licensee contributes to
  * contain a file documenting the changes Licensee made to create that Covered
  * Code and the date of any change. Licensee must include in that file the
  * documentation of any changes made by any predecessor Licensee. Licensee
  * must include a prominent statement that the modification is derived,
  * directly or indirectly, from Original Intel Code.
  *
  * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
  * Redistribution of source code of any substantial portion of the Covered
  * Code or modification without rights to further distribute source must
  * include the following Disclaimer and Export Compliance provision in the
  * documentation and/or other materials provided with distribution. In
  * addition, Licensee may not authorize further sublicense of source of any
  * portion of the Covered Code, and must include terms to the effect that the
  * license from Licensee to its licensee is limited to the intellectual
  * property embodied in the software Licensee provides to its licensee, and
  * not to intellectual property embodied in modifications its licensee may
  * make.
  *
  * 3.3. Redistribution of Executable. Redistribution in executable form of any
  * substantial portion of the Covered Code or modification must reproduce the
  * above Copyright Notice, and the following Disclaimer and Export Compliance
  * provision in the documentation and/or other materials provided with the
  * distribution.
  *
  * 3.4. Intel retains all right, title, and interest in and to the Original
  * Intel Code.
  *
  * 3.5. Neither the name Intel nor any other trademark owned or controlled by
  * Intel shall be used in advertising or otherwise to promote the sale, use or
  * other dealings in products derived from or relating to the Covered Code
  * without prior written authorization from Intel.
  *
  * 4. Disclaimer and Export Compliance
  *
  * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
  * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
  * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
  * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
  * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
  * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
  * PARTICULAR PURPOSE.
  *
  * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
  * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
  * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
  * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
  * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
  * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
  * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
  * LIMITED REMEDY.
  *
  * 4.3. Licensee shall not export, either directly or indirectly, any of this
  * software or system incorporating such software without first obtaining any
  * required license or other approval from the U. S. Department of Commerce or
  * any other agency or department of the United States Government. In the
  * event Licensee exports any such software from the United States or
  * re-exports any such software from a foreign destination, Licensee shall
  * ensure that the distribution and export/re-export of the software is in
  * compliance with all laws, regulations, orders, or other restrictions of the
  * U.S. Export Administration Regulations. Licensee agrees that neither it nor
  * any of its subsidiaries will export/re-export any technical data, process,
  * software, or service, directly or indirectly, to any country for which the
  * United States government or any agency thereof requires an export license,
  * other governmental approval, or letter of assurance, without first obtaining
  * such license, approval or letter.
  *
  *****************************************************************************
  *
  * Alternatively, you may choose to be licensed under the terms of the
  * following license:
  *
  * 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.
  *
  * 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 MERCHANTABILITY AND FITNESS FOR
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * 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 DAMAGE.
  *
  * Alternatively, you may choose to be licensed under the terms of the
  * GNU General Public License ("GPL") version 2 as published by the Free
  * Software Foundation.
  *
  *****************************************************************************/
 
 #include "acpi.h"
 #include "accommon.h"
 #include "acnamesp.h"
 #include "acinterp.h"
 #include "acpredef.h"
 #include "amlresrc.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 conversions that are available:
  *  Convert a null return or zero return value to an EndTag descriptor
  *  Convert an ASCII string to a Unicode buffer
  *
  * An incorrect standalone object is wrapped with required outer package
  *
  * Additional possible repairs:
  * Required package elements that are NULL replaced by Integer/String/Buffer
  *
  ******************************************************************************/
 
 
 /* Local prototypes */
 
 static const ACPI_SIMPLE_REPAIR_INFO *
 AcpiNsMatchSimpleRepair (
     ACPI_NAMESPACE_NODE     *Node,
     UINT32                  ReturnBtype,
     UINT32                  PackageIndex);
 
 
 /*
  * Special but simple repairs for some names.
  *
  * 2nd argument: Unexpected types that can be repaired
  */
 static const ACPI_SIMPLE_REPAIR_INFO    AcpiObjectRepairInfo[] =
 {
     /* Resource descriptor conversions */
 
     { "_CRS", ACPI_RTYPE_INTEGER | ACPI_RTYPE_STRING | ACPI_RTYPE_BUFFER | ACPI_RTYPE_NONE,
                 ACPI_NOT_PACKAGE_ELEMENT,
                 AcpiNsConvertToResource },
     { "_DMA", ACPI_RTYPE_INTEGER | ACPI_RTYPE_STRING | ACPI_RTYPE_BUFFER | ACPI_RTYPE_NONE,
                 ACPI_NOT_PACKAGE_ELEMENT,
                 AcpiNsConvertToResource },
     { "_PRS", ACPI_RTYPE_INTEGER | ACPI_RTYPE_STRING | ACPI_RTYPE_BUFFER | ACPI_RTYPE_NONE,
                 ACPI_NOT_PACKAGE_ELEMENT,
                 AcpiNsConvertToResource },
 
     /* Object reference conversions */
 
     { "_DEP", ACPI_RTYPE_STRING, ACPI_ALL_PACKAGE_ELEMENTS,
                 AcpiNsConvertToReference },
 
     /* Unicode conversions */
 
     { "_MLS", ACPI_RTYPE_STRING, 1,
                 AcpiNsConvertToUnicode },
     { "_STR", ACPI_RTYPE_STRING | ACPI_RTYPE_BUFFER,
                 ACPI_NOT_PACKAGE_ELEMENT,
                 AcpiNsConvertToUnicode },
     { {0,0,0,0}, 0, 0, NULL } /* Table terminator */
 };
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiNsSimpleRepair
  *
  * PARAMETERS:  Info                - Method execution information block
  *              ExpectedBtypes      - Object types expected
  *              PackageIndex        - Index of object within parent package (if
  *                                    applicable - ACPI_NOT_PACKAGE_ELEMENT
  *                                    otherwise)
  *              ReturnObjectPtr     - 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
 AcpiNsSimpleRepair (
     ACPI_EVALUATE_INFO      *Info,
     UINT32                  ExpectedBtypes,
     UINT32                  PackageIndex,
     ACPI_OPERAND_OBJECT     **ReturnObjectPtr)
 {
     ACPI_OPERAND_OBJECT     *ReturnObject = *ReturnObjectPtr;
     ACPI_OPERAND_OBJECT     *NewObject = NULL;
     ACPI_STATUS             Status;
     const ACPI_SIMPLE_REPAIR_INFO   *Predefined;
 
 
     ACPI_FUNCTION_NAME (NsSimpleRepair);
 
 
     /*
      * Special repairs for certain names that are in the repair table.
      * Check if this name is in the list of repairable names.
      */
     Predefined = AcpiNsMatchSimpleRepair (Info->Node,
         Info->ReturnBtype, PackageIndex);
     if (Predefined)
     {
         if (!ReturnObject)
         {
             ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname,
                 ACPI_WARN_ALWAYS, "Missing expected return value"));
         }
 
         Status = Predefined->ObjectConverter (Info->Node, ReturnObject,
             &NewObject);
         if (ACPI_FAILURE (Status))
         {
             /* A fatal error occurred during a conversion */
 
             ACPI_EXCEPTION ((AE_INFO, Status,
                 "During return object analysis"));
             return (Status);
         }
         if (NewObject)
         {
             goto ObjectRepaired;
         }
     }
 
     /*
      * Do not perform simple object repair unless the return type is not
      * expected.
      */
     if (Info->ReturnBtype & ExpectedBtypes)
     {
         return (AE_OK);
     }
 
     /*
      * 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 there is no return value, check if we require a return value for
      * this predefined name. Either one return value is expected, or none,
      * for both methods and other objects.
      *
      * Try to fix if there was no return object. Warning if failed to fix.
      */
     if (!ReturnObject)
     {
         if (ExpectedBtypes)
         {
             if (!(ExpectedBtypes & ACPI_RTYPE_NONE) &&
                 PackageIndex != ACPI_NOT_PACKAGE_ELEMENT)
             {
                 ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname,
                     ACPI_WARN_ALWAYS, "Found unexpected NULL package element"));
 
                 Status = AcpiNsRepairNullElement (Info, ExpectedBtypes,
                     PackageIndex, ReturnObjectPtr);
                 if (ACPI_SUCCESS (Status))
                 {
                     return (AE_OK); /* Repair was successful */
                 }
             }
 
             if (ExpectedBtypes != ACPI_RTYPE_NONE)
             {
                 ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname,
                                        ACPI_WARN_ALWAYS,
                                        "Missing expected return value"));
                 return (AE_AML_NO_RETURN_VALUE);
             }
         }
     }
 
     if (ExpectedBtypes & ACPI_RTYPE_INTEGER)
     {
         Status = AcpiNsConvertToInteger (ReturnObject, &NewObject);
         if (ACPI_SUCCESS (Status))
         {
             goto ObjectRepaired;
         }
     }
     if (ExpectedBtypes & ACPI_RTYPE_STRING)
     {
         Status = AcpiNsConvertToString (ReturnObject, &NewObject);
         if (ACPI_SUCCESS (Status))
         {
             goto ObjectRepaired;
         }
     }
     if (ExpectedBtypes & ACPI_RTYPE_BUFFER)
     {
         Status = AcpiNsConvertToBuffer (ReturnObject, &NewObject);
         if (ACPI_SUCCESS (Status))
         {
             goto ObjectRepaired;
         }
     }
     if (ExpectedBtypes & ACPI_RTYPE_PACKAGE)
     {
         /*
          * A package is expected. We will wrap the existing object with a
          * new package object. It is often the case that if a variable-length
          * package is required, but there is only a single object needed, the
          * BIOS will return that object instead of wrapping it with a Package
          * object. Note: after the wrapping, the package will be validated
          * for correct contents (expected object type or types).
          */
         Status = AcpiNsWrapWithPackage (Info, ReturnObject, &NewObject);
         if (ACPI_SUCCESS (Status))
         {
             /*
              * The original object just had its reference count
              * incremented for being inserted into the new package.
              */
             *ReturnObjectPtr = NewObject;       /* New Package object */
             Info->ReturnFlags |= ACPI_OBJECT_REPAIRED;
             return (AE_OK);
         }
     }
 
     /* We cannot repair this object */
 
     return (AE_AML_OPERAND_TYPE);
 
 
 ObjectRepaired:
 
     /* Object was successfully repaired */
 
     if (PackageIndex != ACPI_NOT_PACKAGE_ELEMENT)
     {
         /* Update reference count of new object */
 
         if (!(Info->ReturnFlags & ACPI_OBJECT_WRAPPED))
         {
             NewObject->Common.ReferenceCount =
                 ReturnObject->Common.ReferenceCount;
         }
 
         ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR,
             "%s: Converted %s to expected %s at Package index %u\n",
             Info->FullPathname, AcpiUtGetObjectTypeName (ReturnObject),
             AcpiUtGetObjectTypeName (NewObject), PackageIndex));
     }
     else
     {
         ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR,
             "%s: Converted %s to expected %s\n",
             Info->FullPathname, AcpiUtGetObjectTypeName (ReturnObject),
             AcpiUtGetObjectTypeName (NewObject)));
     }
 
     /* Delete old object, install the new return object */
 
     AcpiUtRemoveReference (ReturnObject);
     *ReturnObjectPtr = NewObject;
     Info->ReturnFlags |= ACPI_OBJECT_REPAIRED;
     return (AE_OK);
 }
 
 
 /******************************************************************************
  *
  * FUNCTION:    AcpiNsMatchSimpleRepair
  *
  * PARAMETERS:  Node                - Namespace node for the method/object
  *              ReturnBtype         - Object type that was returned
  *              PackageIndex        - Index of object within parent package (if
  *                                    applicable - ACPI_NOT_PACKAGE_ELEMENT
  *                                    otherwise)
  *
  * RETURN:      Pointer to entry in repair table. NULL indicates not found.
  *
  * DESCRIPTION: Check an object name against the repairable object list.
  *
  *****************************************************************************/
 
 static const ACPI_SIMPLE_REPAIR_INFO *
 AcpiNsMatchSimpleRepair (
     ACPI_NAMESPACE_NODE     *Node,
     UINT32                  ReturnBtype,
     UINT32                  PackageIndex)
 {
     const ACPI_SIMPLE_REPAIR_INFO   *ThisName;
 
 
     /* Search info table for a repairable predefined method/object name */
 
     ThisName = AcpiObjectRepairInfo;
     while (ThisName->ObjectConverter)
     {
         if (ACPI_COMPARE_NAMESEG (Node->Name.Ascii, ThisName->Name))
         {
             /* Check if we can actually repair this name/type combination */
 
             if ((ReturnBtype & ThisName->UnexpectedBtypes) &&
                 (ThisName->PackageIndex == ACPI_ALL_PACKAGE_ELEMENTS ||
                  PackageIndex == ThisName->PackageIndex))
             {
                 return (ThisName);
             }
 
             return (NULL);
         }
 
         ThisName++;
     }
 
     return (NULL); /* Name was not found in the repair table */
 }
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiNsRepairNullElement
  *
  * PARAMETERS:  Info                - Method execution information block
  *              ExpectedBtypes      - Object types expected
  *              PackageIndex        - Index of object within parent package (if
  *                                    applicable - ACPI_NOT_PACKAGE_ELEMENT
  *                                    otherwise)
  *              ReturnObjectPtr     - 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
 AcpiNsRepairNullElement (
     ACPI_EVALUATE_INFO      *Info,
     UINT32                  ExpectedBtypes,
     UINT32                  PackageIndex,
     ACPI_OPERAND_OBJECT     **ReturnObjectPtr)
 {
     ACPI_OPERAND_OBJECT     *ReturnObject = *ReturnObjectPtr;
     ACPI_OPERAND_OBJECT     *NewObject;
 
 
     ACPI_FUNCTION_NAME (NsRepairNullElement);
 
 
     /* No repair needed if return object is non-NULL */
 
     if (ReturnObject)
     {
         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 (ExpectedBtypes & ACPI_RTYPE_INTEGER)
     {
         /* Need an Integer - create a zero-value integer */
 
         NewObject = AcpiUtCreateIntegerObject ((UINT64) 0);
     }
     else if (ExpectedBtypes & ACPI_RTYPE_STRING)
     {
         /* Need a String - create a NULL string */
 
         NewObject = AcpiUtCreateStringObject (0);
     }
     else if (ExpectedBtypes & ACPI_RTYPE_BUFFER)
     {
         /* Need a Buffer - create a zero-length buffer */
 
         NewObject = AcpiUtCreateBufferObject (0);
     }
     else
     {
         /* Error for all other expected types */
 
         return (AE_AML_OPERAND_TYPE);
     }
 
     if (!NewObject)
     {
         return (AE_NO_MEMORY);
     }
 
     /* Set the reference count according to the parent Package object */
 
     NewObject->Common.ReferenceCount =
         Info->ParentPackage->Common.ReferenceCount;
 
     ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR,
         "%s: Converted NULL package element to expected %s at index %u\n",
         Info->FullPathname, AcpiUtGetObjectTypeName (NewObject),
         PackageIndex));
 
     *ReturnObjectPtr = NewObject;
     Info->ReturnFlags |= ACPI_OBJECT_REPAIRED;
     return (AE_OK);
 }
 
 
 /******************************************************************************
  *
  * FUNCTION:    AcpiNsRemoveNullElements
  *
  * PARAMETERS:  Info                - Method execution information block
  *              PackageType         - An AcpiReturnPackageTypes value
  *              ObjDesc             - A Package object
  *
  * RETURN:      None.
  *
  * DESCRIPTION: Remove all NULL package elements from packages that contain
  *              a variable number of subpackages. For these types of
  *              packages, NULL elements can be safely removed.
  *
  *****************************************************************************/
 
 void
 AcpiNsRemoveNullElements (
     ACPI_EVALUATE_INFO      *Info,
     UINT8                   PackageType,
     ACPI_OPERAND_OBJECT     *ObjDesc)
 {
     ACPI_OPERAND_OBJECT     **Source;
     ACPI_OPERAND_OBJECT     **Dest;
     UINT32                  Count;
     UINT32                  NewCount;
     UINT32                  i;
 
 
     ACPI_FUNCTION_NAME (NsRemoveNullElements);
 
 
     /*
      * 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 subpackages.
      */
     switch (PackageType)
     {
     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:
     case ACPI_PTYPE2_FIX_VAR:
         break;
 
     default:
     case ACPI_PTYPE2_VAR_VAR:
     case ACPI_PTYPE1_FIXED:
     case ACPI_PTYPE1_OPTION:
         return;
     }
 
     Count = ObjDesc->Package.Count;
     NewCount = Count;
 
     Source = ObjDesc->Package.Elements;
     Dest = Source;
 
     /* Examine all elements of the package object, remove nulls */
 
     for (i = 0; i < Count; i++)
     {
         if (!*Source)
         {
             NewCount--;
         }
         else
         {
             *Dest = *Source;
             Dest++;
         }
 
         Source++;
     }
 
     /* Update parent package if any null elements were removed */
 
     if (NewCount < Count)
     {
         ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR,
             "%s: Found and removed %u NULL elements\n",
             Info->FullPathname, (Count - NewCount)));
 
         /* NULL terminate list and update the package count */
 
         *Dest = NULL;
         ObjDesc->Package.Count = NewCount;
     }
 }
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiNsWrapWithPackage
  *
  * PARAMETERS:  Info                - Method execution information block
  *              OriginalObject      - Pointer to the object to repair.
  *              ObjDescPtr          - The new package object is returned here
  *
  * RETURN:      Status, new object in *ObjDescPtr
  *
  * DESCRIPTION: Repair a common problem with objects that are defined to
  *              return a variable-length Package of sub-objects. If there is
  *              only one sub-object, some BIOS code mistakenly simply declares
  *              the single object instead of a Package with one sub-object.
  *              This function attempts to repair this error by wrapping a
  *              Package object around the original object, creating the
  *              correct and expected Package with one sub-object.
  *
  *              Names that can be repaired in this manner include:
  *              _ALR, _CSD, _HPX, _MLS, _PLD, _PRT, _PSS, _TRT, _TSS,
  *              _BCL, _DOD, _FIX, _Sx
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiNsWrapWithPackage (
     ACPI_EVALUATE_INFO      *Info,
     ACPI_OPERAND_OBJECT     *OriginalObject,
     ACPI_OPERAND_OBJECT     **ObjDescPtr)
 {
     ACPI_OPERAND_OBJECT     *PkgObjDesc;
 
 
     ACPI_FUNCTION_NAME (NsWrapWithPackage);
 
 
     /*
      * Create the new outer package and populate it. The new
      * package will have a single element, the lone sub-object.
      */
     PkgObjDesc = AcpiUtCreatePackageObject (1);
     if (!PkgObjDesc)
     {
         return (AE_NO_MEMORY);
     }
 
     PkgObjDesc->Package.Elements[0] = OriginalObject;
 
     ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR,
         "%s: Wrapped %s with expected Package object\n",
         Info->FullPathname, AcpiUtGetObjectTypeName (OriginalObject)));
 
     /* Return the new object in the object pointer */
 
     *ObjDescPtr = PkgObjDesc;
     Info->ReturnFlags |= ACPI_OBJECT_REPAIRED | ACPI_OBJECT_WRAPPED;
     return (AE_OK);
 }

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