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| author | Bob Moore <robert.moore@intel.com> | 2008-09-27 10:29:31 +0800 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2008-10-22 23:14:43 -0400 |
| commit | b68bacf225e5e9758472e99505d76125ced3ea88 (patch) | |
| tree | 82d552e04aca32fa590a84bb6fada78adddc19e4 /drivers/acpi/namespace | |
| parent | 65f4692c5220330e1ea044796c4cfa603e349c84 (diff) | |
| download | lwn-b68bacf225e5e9758472e99505d76125ced3ea88.tar.gz lwn-b68bacf225e5e9758472e99505d76125ced3ea88.zip | |
ACPICA: Disallow evaluation of named object types with no value
Return AE_TYPE for objects that have no value and therefore
evaluation is undefined: Device, Event, Mutex, Region, Thermal,
and Scope.
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/namespace')
| -rw-r--r-- | drivers/acpi/namespace/nseval.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/acpi/namespace/nseval.c b/drivers/acpi/namespace/nseval.c index d369164e00b0..0a1ae670a847 100644 --- a/drivers/acpi/namespace/nseval.c +++ b/drivers/acpi/namespace/nseval.c @@ -195,7 +195,28 @@ acpi_status acpi_ns_evaluate(struct acpi_evaluate_info * info) } else { /* * 2) Object is not a method, return its current value + * + * Disallow certain object types. For these, "evaluation" is undefined. */ + switch (info->resolved_node->type) { + case ACPI_TYPE_DEVICE: + case ACPI_TYPE_EVENT: + case ACPI_TYPE_MUTEX: + case ACPI_TYPE_REGION: + case ACPI_TYPE_THERMAL: + case ACPI_TYPE_LOCAL_SCOPE: + + ACPI_ERROR((AE_INFO, + "[%4.4s] Evaluation of object type [%s] is not supported", + info->resolved_node->name.ascii, + acpi_ut_get_type_name(info->resolved_node-> + type))); + + return_ACPI_STATUS(AE_TYPE); + + default: + break; + } /* * Objects require additional resolution steps (e.g., the Node may be |