patch-2.4.23 linux-2.4.23/drivers/acpi/hardware/hwacpi.c

• Lines: 16
• Date: 2003-11-28 10:26:19.000000000 -0800
• Orig file: linux-2.4.22/drivers/acpi/hardware/hwacpi.c
• Orig date: 2003-08-25 04:44:41.000000000 -0700

diff -urN linux-2.4.22/drivers/acpi/hardware/hwacpi.c linux-2.4.23/drivers/acpi/hardware/hwacpi.c
@@ -212,6 +212,15 @@
 	if (!acpi_gbl_FADT->smi_cmd)
 		return_VALUE (ACPI_SYS_MODE_ACPI);
 
+
+	/*
+	 * ACPI 2.0 clarified that if SMI_CMD in FADT is zero,
+	 * system does not support mode transition.
+	 */
+	if (!acpi_gbl_FADT->smi_cmd) {
+		return_VALUE (ACPI_SYS_MODE_ACPI);
+	}
+
 	status = acpi_get_register (ACPI_BITREG_SCI_ENABLE, &value, ACPI_MTX_LOCK);
 	if (ACPI_FAILURE (status)) {
 		return_VALUE (ACPI_SYS_MODE_LEGACY);