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ACPICA: Add repair for bad _BIF/_BIX packages 

Add a repair for the "Oem Information" field which is often
mistakenly returned as an integer. It should always be a string.
ACPICA BZ 807.

http://www.acpica.org/bugzilla/show_bug.cgi?id=807

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 2009-10-13 10:20:33 +08:00 committed by Len Brown
parent 648f4e3e50
commit 2752699392
1 changed files with 66 additions and 27 deletions
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93
drivers/acpi/acpica/nsrepair.c
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@ -77,6 +77,11 @@ acpi_ns_repair_object(struct acpi_predefined_data *data,
union acpi_operand_object *new_object;
acpi_size length;
/*
* 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. Only a limited number of repairs are possible.
*/
switch (return_object->common.type) {
case ACPI_TYPE_BUFFER:
@ -111,43 +116,77 @@ acpi_ns_repair_object(struct acpi_predefined_data *data,
*/
ACPI_MEMCPY(new_object->string.pointer,
return_object->buffer.pointer, length);
break;
/*
* 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.
*/
if (package_index != ACPI_NOT_PACKAGE_ELEMENT) {
new_object->common.reference_count =
return_object->common.reference_count;
case ACPI_TYPE_INTEGER:
if (return_object->common.reference_count > 1) {
return_object->common.reference_count--;
/* Does the method/object legally return a string? */
if (expected_btypes & ACPI_RTYPE_STRING) {
/*
* The only supported Integer-to-String conversion is to convert
* an integer of value 0 to a NULL string. The last element of
* _BIF and _BIX packages occasionally need this fix.
*/
if (return_object->integer.value != 0) {
return (AE_AML_OPERAND_TYPE);
}
ACPI_WARN_PREDEFINED((AE_INFO, data->pathname,
data->node_flags,
"Converted Buffer to expected String at index %u",
package_index));
/* Allocate a new NULL string object */
new_object = acpi_ut_create_string_object(0);
if (!new_object) {
return (AE_NO_MEMORY);
}
} else {
ACPI_WARN_PREDEFINED((AE_INFO, data->pathname,
data->node_flags,
"Converted Buffer to expected String"));
return (AE_AML_OPERAND_TYPE);
}
/* Delete old object, install the new return object */
acpi_ut_remove_reference(return_object);
*return_object_ptr = new_object;
data->flags |= ACPI_OBJECT_REPAIRED;
return (AE_OK);
break;
default:
break;
/* We cannot repair this object */
return (AE_AML_OPERAND_TYPE);
}
return (AE_AML_OPERAND_TYPE);
/* Object was successfully repaired */
/*
* 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.
*/
if (package_index != ACPI_NOT_PACKAGE_ELEMENT) {
new_object->common.reference_count =
return_object->common.reference_count;
if (return_object->common.reference_count > 1) {
return_object->common.reference_count--;
}
ACPI_WARN_PREDEFINED((AE_INFO, data->pathname, data->node_flags,
"Converted %s to expected %s at index %u",
acpi_ut_get_object_type_name
(return_object),
acpi_ut_get_object_type_name(new_object),
package_index));
} else {
ACPI_WARN_PREDEFINED((AE_INFO, data->pathname, data->node_flags,
"Converted %s to expected %s",
acpi_ut_get_object_type_name
(return_object),
acpi_ut_get_object_type_name
(new_object)));
}
/* Delete old object, install the new return object */
acpi_ut_remove_reference(return_object);
*return_object_ptr = new_object;
data->flags |= ACPI_OBJECT_REPAIRED;
return (AE_OK);
}
/*******************************************************************************