diff options
| author | Fenghua Yu <fenghua.yu@intel.com> | 2011-07-04 08:36:16 +0000 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2011-07-13 23:51:49 -0400 |
| commit | 8f9c91273e36e5762c617c23e4fd48d5172e0dac (patch) | |
| tree | 98773e4e0b5f5d4da1648ba841ec3945fdfda728 /drivers/acpi/acpica/nsrepair2.c | |
| parent | d57b23ad0ca7a46931e4d98eb6b4b73b112f0969 (diff) | |
| download | linux-8f9c91273e36e5762c617c23e4fd48d5172e0dac.tar.gz linux-8f9c91273e36e5762c617c23e4fd48d5172e0dac.tar.bz2 linux-8f9c91273e36e5762c617c23e4fd48d5172e0dac.zip | |
ACPICA: Do not repair _TSS return package if _PSS is present
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>
Diffstat (limited to 'drivers/acpi/acpica/nsrepair2.c')
| -rw-r--r-- | drivers/acpi/acpica/nsrepair2.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/nsrepair2.c b/drivers/acpi/acpica/nsrepair2.c index 973883babee1..024c4f263f87 100644 --- a/drivers/acpi/acpica/nsrepair2.c +++ b/drivers/acpi/acpica/nsrepair2.c @@ -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, |