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| author | Lv Zheng <lv.zheng@intel.com> | 2013-10-31 09:30:36 +0800 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-10-31 14:37:33 +0100 |
| commit | 130797a6c3f1421c10880a1681d6a9c57b80ef17 (patch) | |
| tree | 707e88e530660a340963b5482b4584324426b81e | |
| parent | 9187a415fd119c1d89a5ad2fd05513cd43699ebf (diff) | |
| download | linux-130797a6c3f1421c10880a1681d6a9c57b80ef17.tar.bz2 | |
ACPICA: Fix wrong object length returned by acpi_ut_get_simple_object_size().
The object length returned by acpi_ut_get_simple_object_size() should
be rounded up to the closest word boundary.
This patch ports a fix from ACPICA upstream to Linux.
[rjw: Changelog]
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| -rw-r--r-- | drivers/acpi/acpica/utobject.c | 23 |
1 files changed, 13 insertions, 10 deletions
diff --git a/drivers/acpi/acpica/utobject.c b/drivers/acpi/acpica/utobject.c index aa61f66ee861..cddb0ef5b9b7 100644 --- a/drivers/acpi/acpica/utobject.c +++ b/drivers/acpi/acpica/utobject.c @@ -461,25 +461,28 @@ acpi_ut_get_simple_object_size(union acpi_operand_object *internal_object, ACPI_FUNCTION_TRACE_PTR(ut_get_simple_object_size, internal_object); + /* Start with the length of the (external) Acpi object */ + + length = sizeof(union acpi_object); + + /* A NULL object is allowed, can be a legal uninitialized package element */ + + if (!internal_object) { /* - * Handle a null object (Could be a uninitialized package - * element -- which is legal) + * Object is NULL, just return the length of union acpi_object + * (A NULL union acpi_object is an object of all zeroes.) */ - if (!internal_object) { - *obj_length = sizeof(union acpi_object); + *obj_length = ACPI_ROUND_UP_TO_NATIVE_WORD(length); return_ACPI_STATUS(AE_OK); } - /* Start with the length of the Acpi object */ - - length = sizeof(union acpi_object); + /* A Namespace Node should never appear here */ if (ACPI_GET_DESCRIPTOR_TYPE(internal_object) == ACPI_DESC_TYPE_NAMED) { - /* Object is a named object (reference), just return the length */ + /* A namespace node should never get here */ - *obj_length = ACPI_ROUND_UP_TO_NATIVE_WORD(length); - return_ACPI_STATUS(status); + return_ACPI_STATUS(AE_AML_INTERNAL); } /* |