ACPICA: Object repair code: Support to add Package wrappers (6a99b1c9) · Commits · e / devices / android_kernel_samsung_universal8895

drivers/acpi/acpica/aclocal.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -370,6 +370,7 @@ struct acpi_predefined_data {
		/* Defines for Flags field above */

		#define ACPI_OBJECT_REPAIRED 1
		#define ACPI_OBJECT_WRAPPED 2

		/*
		* Bitmapped return value types

drivers/acpi/acpica/acnamesp.h

+3 −2

Original line number	Diff line number	Diff line
		@@ -283,7 +283,8 @@ acpi_ns_repair_object(struct acpi_predefined_data *data,
		union acpi_operand_object **return_object_ptr);

		acpi_status
		acpi_ns_repair_package_list(struct acpi_predefined_data *data,
		acpi_ns_wrap_with_package(struct acpi_predefined_data *data,
		union acpi_operand_object *original_object,
		union acpi_operand_object **obj_desc_ptr);

		acpi_status

drivers/acpi/acpica/nspredef.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -638,7 +638,7 @@ acpi_ns_check_package(struct acpi_predefined_data *data,
		/* Create the new outer package and populate it */

		status =
		acpi_ns_repair_package_list(data,
		acpi_ns_wrap_with_package(data, *elements,
		return_object_ptr);
		if (ACPI_FAILURE(status)) {
		return (status);

drivers/acpi/acpica/nsrepair.c

+58 −101

Original line number	Diff line number	Diff line
		@@ -71,11 +71,10 @@ ACPI_MODULE_NAME("nsrepair")
		* Buffer -> String
		* Buffer -> Package of Integers
		* Package -> Package of one Package
		* An incorrect standalone object is wrapped with required outer 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 */
		@@ -91,10 +90,6 @@ 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
		@@ -151,9 +146,24 @@ acpi_ns_repair_object(struct acpi_predefined_data *data,
		}
		}
		if (expected_btypes & ACPI_RTYPE_PACKAGE) {
		status = acpi_ns_convert_to_package(return_object, &new_object);
		/*
		* 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 =
		acpi_ns_wrap_with_package(data, return_object, &new_object);
		if (ACPI_SUCCESS(status)) {
		goto object_repaired;
		/*
		* The original object just had its reference count
		* incremented for being inserted into the new package.
		*/
		return_object_ptr = new_object; / New Package object */
		data->flags \|= ACPI_OBJECT_REPAIRED;
		return (AE_OK);
		}
		}

		@@ -165,22 +175,27 @@ acpi_ns_repair_object(struct acpi_predefined_data *data,

		/* Object was successfully repaired */

		if (package_index != ACPI_NOT_PACKAGE_ELEMENT) {
		/*
		* 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.
		* The original object is a package element. We need to
		* decrement the reference count of the original object,
		* for removing it from the package.
		*
		* However, if the original object was just wrapped with a
		* package object as part of the repair, we don't need to
		* change the reference count.
		*/
		if (package_index != ACPI_NOT_PACKAGE_ELEMENT) {
		if (!(data->flags & ACPI_OBJECT_WRAPPED)) {
		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",
		"%s: Converted %s to expected %s at Package index %u\n",
		data->pathname,
		acpi_ut_get_object_type_name(return_object),
		acpi_ut_get_object_type_name(new_object),
		@@ -451,65 +466,6 @@ acpi_ns_convert_to_buffer(union acpi_operand_object *original_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
		@@ -677,55 +633,56 @@ acpi_ns_remove_null_elements(struct acpi_predefined_data *data,

		/*******************************************************************************
		*
		* FUNCTION: acpi_ns_repair_package_list
		* FUNCTION: acpi_ns_wrap_with_package
		*
		* 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.
		* original_object - Pointer to the object to repair.
		* obj_desc_ptr - The new package object is returned here
		*
		* 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.
		* 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, _PRT, _PSS, _TRT, TSS
		* _ALR, _CSD, _HPX, _MLS, _PLD, _PRT, _PSS, _TRT, _TSS,
		* _BCL, _DOD, _FIX, _Sx
		*
		******************************************************************************/

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

		ACPI_FUNCTION_NAME(ns_repair_package_list);
		ACPI_FUNCTION_NAME(ns_wrap_with_package);

		/*
		* Create the new outer package and populate it. The new package will
		* have a single element, the lone subpackage.
		* have a single element, the lone sub-object.
		*/
		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;
		pkg_obj_desc->package.elements[0] = original_object;

		ACPI_DEBUG_PRINT((ACPI_DB_REPAIR,
		"%s: Wrapped %s with expected Package object\n",
		data->pathname,
		acpi_ut_get_object_type_name(original_object)));

		/* 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));

		data->flags \|= ACPI_OBJECT_REPAIRED \| ACPI_OBJECT_WRAPPED;
		return (AE_OK);
		}