diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c
index c5c41ae..ac1b644 100644
--- a/drivers/usb/serial/sierra.c
+++ b/drivers/usb/serial/sierra.c
@@ -1005,7 +1005,7 @@
 	struct sierra_intf_private *intfdata;
 	int b;
 
-	if (serial->dev->auto_pm) {
+	if (message.event & PM_EVENT_AUTO) {
 		intfdata = serial->private;
 		spin_lock_irq(&intfdata->susp_lock);
 		b = intfdata->in_flight;