From 34c39c755347c1ca3d06284bad2273c6a9c3108a Mon Sep 17 00:00:00 2001 From: Bob Moore Date: Fri, 11 Dec 2009 14:53:11 +0800 Subject: ACPICA: Add repair for bad _FDE/_GTM buffers The expected return value for both names is a Buffer of 5 DWORDS. This repair fixes two possible problems (both seen in the field): A package of integers is returned, or a buffer of BYTEs is returned. Signed-off-by: Bob Moore Signed-off-by: Lin Ming Signed-off-by: Len Brown --- drivers/acpi/acpica/nsrepair2.c | 149 +++++++++++++++++++++++++++++++++++++++- 1 file changed, 146 insertions(+), 3 deletions(-) (limited to 'drivers/acpi/acpica/nsrepair2.c') diff --git a/drivers/acpi/acpica/nsrepair2.c b/drivers/acpi/acpica/nsrepair2.c index d07b686..6c35b57 100644 --- a/drivers/acpi/acpica/nsrepair2.c +++ b/drivers/acpi/acpica/nsrepair2.c @@ -74,6 +74,10 @@ acpi_ns_repair_ALR(struct acpi_predefined_data *data, union acpi_operand_object **return_object_ptr); static acpi_status +acpi_ns_repair_FDE(struct acpi_predefined_data *data, + union acpi_operand_object **return_object_ptr); + +static acpi_status acpi_ns_repair_PSS(struct acpi_predefined_data *data, union acpi_operand_object **return_object_ptr); @@ -104,17 +108,27 @@ acpi_ns_sort_list(union acpi_operand_object **elements, * This table contains the names of the predefined methods for which we can * perform more complex repairs. * - * _ALR: Sort the list ascending by ambient_illuminance if necessary - * _PSS: Sort the list descending by Power if necessary - * _TSS: Sort the list descending by Power if necessary + * As necessary: + * + * _ALR: Sort the list ascending by ambient_illuminance + * _FDE: Convert a Package or Buffer of BYTEs to a Buffer of DWORDs + * _GTM: Convert a Package or Buffer of BYTEs to a Buffer of DWORDs + * _PSS: Sort the list descending by Power + * _TSS: Sort the list descending by Power */ static const struct acpi_repair_info acpi_ns_repairable_names[] = { {"_ALR", acpi_ns_repair_ALR}, + {"_FDE", acpi_ns_repair_FDE}, + {"_GTM", acpi_ns_repair_FDE}, /* _GTM has same repair as _FDE */ {"_PSS", acpi_ns_repair_PSS}, {"_TSS", acpi_ns_repair_TSS}, {{0, 0, 0, 0}, NULL} /* Table terminator */ }; +#define ACPI_FDE_FIELD_COUNT 5 +#define ACPI_FDE_BYTE_BUFFER_SIZE 5 +#define ACPI_FDE_DWORD_BUFFER_SIZE (ACPI_FDE_FIELD_COUNT * sizeof (u32)) + /****************************************************************************** * * FUNCTION: acpi_ns_complex_repairs @@ -215,6 +229,135 @@ acpi_ns_repair_ALR(struct acpi_predefined_data *data, /****************************************************************************** * + * FUNCTION: acpi_ns_repair_FDE + * + * PARAMETERS: Data - Pointer to validation data structure + * return_object_ptr - Pointer to the object returned from the + * evaluation of a method or object + * + * RETURN: Status. AE_OK if object is OK or was repaired successfully + * + * DESCRIPTION: Repair for the _FDE and _GTM objects. The expected return + * value is a Buffer of 5 DWORDs. This function repairs two + * possible problems: + * 1) The return value is a Buffer of BYTEs, not DWORDs + * 2) The return value is a Package of Integer objects + * + *****************************************************************************/ + +static acpi_status +acpi_ns_repair_FDE(struct acpi_predefined_data *data, + union acpi_operand_object **return_object_ptr) +{ + union acpi_operand_object *return_object = *return_object_ptr; + union acpi_operand_object **elements; + union acpi_operand_object *buffer_object; + u8 *byte_buffer; + u32 *dword_buffer; + u32 count; + u32 i; + + switch (return_object->common.type) { + case ACPI_TYPE_BUFFER: + + /* This is the expected type. Length should be (at least) 5 DWORDs */ + + if (return_object->buffer.length >= ACPI_FDE_DWORD_BUFFER_SIZE) { + return (AE_OK); + } + + /* We can only repair if we have exactly 5 BYTEs */ + + if (return_object->buffer.length != ACPI_FDE_BYTE_BUFFER_SIZE) { + ACPI_WARN_PREDEFINED((AE_INFO, data->pathname, + data->node_flags, + "Incorrect return buffer length %u, expected %u", + return_object->buffer.length, + ACPI_FDE_DWORD_BUFFER_SIZE)); + + return (AE_AML_OPERAND_TYPE); + } + + /* Create the new (larger) buffer object */ + + buffer_object = + acpi_ut_create_buffer_object(ACPI_FDE_DWORD_BUFFER_SIZE); + if (!buffer_object) { + return (AE_NO_MEMORY); + } + + /* Expand each byte to a DWORD */ + + byte_buffer = return_object->buffer.pointer; + dword_buffer = + ACPI_CAST_PTR(u32, buffer_object->buffer.pointer); + + for (i = 0; i < ACPI_FDE_FIELD_COUNT; i++) { + *dword_buffer = (u32) *byte_buffer; + dword_buffer++; + byte_buffer++; + } + + ACPI_INFO_PREDEFINED((AE_INFO, data->pathname, data->node_flags, + "Expanded Byte Buffer to expected DWord Buffer")); + break; + + case ACPI_TYPE_PACKAGE: + + /* All elements of the Package must be integers */ + + elements = return_object->package.elements; + count = + ACPI_MIN(ACPI_FDE_FIELD_COUNT, + return_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 */ + + buffer_object = + acpi_ut_create_buffer_object(ACPI_FDE_DWORD_BUFFER_SIZE); + if (!buffer_object) { + return (AE_NO_MEMORY); + } + + /* Copy the package elements (integers) to the buffer */ + + elements = return_object->package.elements; + dword_buffer = + ACPI_CAST_PTR(u32, buffer_object->buffer.pointer); + + for (i = 0; i < count; i++) { + *dword_buffer = (u32) (*elements)->integer.value; + dword_buffer++; + elements++; + } + + ACPI_INFO_PREDEFINED((AE_INFO, data->pathname, data->node_flags, + "Converted Package to expected Buffer")); + break; + + default: + return (AE_AML_OPERAND_TYPE); + } + + /* Delete the original return object, return the new buffer object */ + + acpi_ut_remove_reference(return_object); + *return_object_ptr = buffer_object; + + data->flags |= ACPI_OBJECT_REPAIRED; + return (AE_OK); +} + +/****************************************************************************** + * * FUNCTION: acpi_ns_repair_TSS * * PARAMETERS: Data - Pointer to validation data structure -- cgit v1.1