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| author | Lin Ming <ming.m.lin@intel.com> | 2008-11-13 11:25:22 +0800 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2008-12-29 22:38:39 -0500 |
| commit | 7a4b8131ac7b47feb110b3e0142d4207ee79a025 (patch) | |
| tree | 7c5320446994efb6f8789d55baab2f7ba42b082f /drivers/acpi/parser/psxface.c | |
| parent | eeb4437e63c39ce19cf9b2de36a1dddbf12910c4 (diff) | |
| download | lwn-7a4b8131ac7b47feb110b3e0142d4207ee79a025.tar.gz lwn-7a4b8131ac7b47feb110b3e0142d4207ee79a025.zip | |
ACPICA: Enhance implicit return mechanism
For Windows compatibility, return an implicit integer of value
zero for methods that have no executable code. A default implicit
value of zero is provided for methods. Lin Ming.
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/parser/psxface.c')
| -rw-r--r-- | drivers/acpi/parser/psxface.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/acpi/parser/psxface.c b/drivers/acpi/parser/psxface.c index 4985ce58c024..41b0c8c052a8 100644 --- a/drivers/acpi/parser/psxface.c +++ b/drivers/acpi/parser/psxface.c @@ -295,6 +295,22 @@ acpi_status acpi_ps_execute_method(struct acpi_evaluate_info *info) goto cleanup; } + /* + * Start method evaluation with an implicit return of zero. + * This is done for Windows compatibility. + */ + if (acpi_gbl_enable_interpreter_slack) { + walk_state->implicit_return_obj = + acpi_ut_create_internal_object(ACPI_TYPE_INTEGER); + if (!walk_state->implicit_return_obj) { + status = AE_NO_MEMORY; + acpi_ds_delete_walk_state(walk_state); + goto cleanup; + } + + walk_state->implicit_return_obj->integer.value = 0; + } + /* Parse the AML */ status = acpi_ps_parse_aml(walk_state); |