ACPICA: Fix to make _SST method optional

Fixes a problem introduced in 20080514 where the status of
execution of _SST is incorrectly returned to the caller. _SST
is optional, and if it is AE_NOT_FOUND, the exception should be
ignored.

http://www.acpica.org/bugzilla/show_bug.cgi?id=716

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>

diff --git a/drivers/acpi/hardware/hwsleep.c b/drivers/acpi/hardware/hwsleep.c
index d9937e05ec6a237d0eff801091dca208eaadcb3c..dba3cfbe8cba9e3235970e7b972e7f54da24c4af 100644 (file)
--- a/drivers/acpi/hardware/hwsleep.c
+++ b/drivers/acpi/hardware/hwsleep.c
@@ -223,15 +223,17 @@ acpi_status acpi_enter_sleep_state_prep(u8 sleep_state)
                break;
        }
 
-       /* Set the system indicators to show the desired sleep state. */
-
+       /*
+        * Set the system indicators to show the desired sleep state.
+        * _SST is an optional method (return no error if not found)
+        */
        status = acpi_evaluate_object(NULL, METHOD_NAME__SST, &arg_list, NULL);
        if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
                ACPI_EXCEPTION((AE_INFO, status,
                                "While executing method _SST"));
        }
 
-       return_ACPI_STATUS(status);
+       return_ACPI_STATUS(AE_OK);
 }
 
 ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_prep)