USB: pl2303: use usb_serial_generic_open

Use generic open rather than calling usb_serial_submit_read_urb
directly.
Signed-off-by: NJohan Hovold <jhovold@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/usb/serial/pl2303.c

@@ -511,7 +511,7 @@ static int pl2303_open(struct tty_struct *tty, struct usb_serial_port *port)
 		return result;
 	}
 
-	result = usb_serial_generic_submit_read_urb(port, GFP_KERNEL);
+	result = usb_serial_generic_open(tty, port);
 	if (result) {
 		usb_kill_urb(port->interrupt_in_urb);
 		return result;