USB: cp210x: use generic open to start reading from device

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/serial/cp210x.c

@@ -379,7 +379,7 @@ static int cp210x_open(struct tty_struct *tty, struct usb_serial_port *port)
 		return -EPROTO;
 	}
 
-	result = usb_serial_generic_submit_read_urb(port, GFP_KERNEL);
+	result = usb_serial_generic_open(tty, port);
 	if (result)
 		return result;