diff --git a/[refs] b/[refs]
index a2cb9e944b1e..4df755f20c2e 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 16871dcac74c63227aa92e0012f3004a648c2062
+refs/heads/master: 9a91aedca2f4ef24344b7cd8f56570e620fbe4d5
diff --git a/trunk/drivers/usb/serial/usb_wwan.c b/trunk/drivers/usb/serial/usb_wwan.c
index fe5e48eb9693..817e6ff8de8b 100644
--- a/trunk/drivers/usb/serial/usb_wwan.c
+++ b/trunk/drivers/usb/serial/usb_wwan.c
@@ -424,6 +424,7 @@ int usb_wwan_open(struct tty_struct *tty, struct usb_serial_port *port)
 	spin_lock_irq(&intfdata->susp_lock);
 	portdata->opened = 1;
 	spin_unlock_irq(&intfdata->susp_lock);
+	/* this balances a get in the generic USB serial code */
 	usb_autopm_put_interface(serial->interface);
 
 	return 0;
@@ -450,7 +451,8 @@ void usb_wwan_close(struct usb_serial_port *port)
 			usb_kill_urb(portdata->in_urbs[i]);
 		for (i = 0; i < N_OUT_URB; i++)
 			usb_kill_urb(portdata->out_urbs[i]);
-		usb_autopm_get_interface(serial->interface);
+		/* balancing - important as an error cannot be handled*/
+		usb_autopm_get_interface_no_resume(serial->interface);
 		serial->interface->needs_remote_wakeup = 0;
 	}
 }