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-rw-r--r--drivers/acpi/scan.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 8ab80bafe3f1..571396cf6110 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -885,6 +885,13 @@ static int acpi_bus_get_power_flags(struct acpi_device *device)
acpi_bus_add_power_resource(ps->resources.handles[j]);
}
+ /* The exist of _PR3 indicates D3Cold support */
+ if (i == ACPI_STATE_D3) {
+ status = acpi_get_handle(device->handle, object_name, &handle);
+ if (ACPI_SUCCESS(status))
+ device->power.states[ACPI_STATE_D3_COLD].flags.valid = 1;
+ }
+
/* Evaluate "_PSx" to see if we can do explicit sets */
object_name[2] = 'S';
status = acpi_get_handle(device->handle, object_name, &handle);