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ACPICA: Do not repair _TSS return package if _PSS is present

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commit 8f9c91273e upstream.

We can only sort the _TSS return package if there is no _PSS
in the same scope. This is because if _PSS is present, the ACPI
specification dictates that the _TSS Power Dissipation field is
to be ignored, and therefore some BIOSs leave garbage values in
the _TSS Power field(s).  In this case, it is best to just return
the _TSS package as-is.

Reported-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Fenghua Yu 2011-07-04 08:36:16 +00:00 committed by Greg Kroah-Hartman
parent 054b93a673
commit 3cba74d538
3 changed files with 17 additions and 0 deletions
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1
drivers/acpi/acpica/aclocal.h
View File

@ -357,6 +357,7 @@ struct acpi_predefined_data {
char *pathname;
const union acpi_predefined_info *predefined;
union acpi_operand_object *parent_package;
struct acpi_namespace_node *node;
u32 flags;
u8 node_flags;
};

1
drivers/acpi/acpica/nspredef.c
View File

@ -212,6 +212,7 @@ acpi_ns_check_predefined_names(struct acpi_namespace_node *node,
goto cleanup;
}
data->predefined = predefined;
data->node = node;
data->node_flags = node->flags;
data->pathname = pathname;

15
drivers/acpi/acpica/nsrepair2.c
View File

@ -503,6 +503,21 @@ acpi_ns_repair_TSS(struct acpi_predefined_data *data,
{
union acpi_operand_object *return_object = *return_object_ptr;
acpi_status status;
struct acpi_namespace_node *node;
/*
* We can only sort the _TSS return package if there is no _PSS in the
* same scope. This is because if _PSS is present, the ACPI specification
* dictates that the _TSS Power Dissipation field is to be ignored, and
* therefore some BIOSs leave garbage values in the _TSS Power field(s).
* In this case, it is best to just return the _TSS package as-is.
* (May, 2011)
*/
status =
acpi_ns_get_node(data->node, "^_PSS", ACPI_NS_NO_UPSEARCH, &node);
if (ACPI_SUCCESS(status)) {
return (AE_OK);
}
status = acpi_ns_check_sorted_list(data, return_object, 5, 1,
ACPI_SORT_DESCENDING,