USB: pl2303: use usb_serial_generic_open

Use generic open rather than calling usb_serial_submit_read_urb
directly.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index 9fdc944..56aa1e6 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -511,7 +511,7 @@
 		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;