iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ACPICA: Add repair for bad _FDE/_GTM buffers

Browse Source 
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 <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Bob Moore 2009-12-11 14:53:11 +08:00 committed by Len Brown
parent ebdca3edd5
commit 34c39c7553
2 changed files with 152 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
drivers/acpi/acpica/nspredef.c
View File

@ -222,23 +222,21 @@ acpi_ns_check_predefined_names(struct acpi_namespace_node *node,
status = acpi_ns_check_object_type(data, return_object_ptr,
predefined->info.expected_btypes,
ACPI_NOT_PACKAGE_ELEMENT);
if (ACPI_FAILURE(status)) {
goto check_validation_status;
}
if (ACPI_SUCCESS(status)) {
/* For returned Package objects, check the type of all sub-objects */
/* For returned Package objects, check the type of all sub-objects */
if (return_object->common.type == ACPI_TYPE_PACKAGE) {
status = acpi_ns_check_package(data, return_object_ptr);
if (return_object->common.type == ACPI_TYPE_PACKAGE) {
status = acpi_ns_check_package(data, return_object_ptr);
}
}
/*
* Perform additional, more complicated repairs on a per-name
* basis.
* basis. Do this regardless of the status from above.
*/
status = acpi_ns_complex_repairs(data, node, status, return_object_ptr);
check_validation_status:
/*
* If the object validation failed or if we successfully repaired one
* or more objects, mark the parent node to suppress further warning

149
drivers/acpi/acpica/nsrepair2.c
View File

@ -73,6 +73,10 @@ static acpi_status
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
@ -213,6 +227,135 @@ acpi_ns_repair_ALR(struct acpi_predefined_data *data,
return (status);
}
/******************************************************************************
*
* 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