usb: usb-serial free urb cleanup

- usb_free_urb() cleanup
Signed-off-by: NMariusz Kozlowski <m.kozlowski@tuxland.pl>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/usb/serial/usb-serial.c

@@ -952,32 +952,28 @@ int usb_serial_probe(struct usb_interface *interface,
 		port = serial->port[i];
 		if (!port)
 			continue;
-		if (port->read_urb)
-			usb_free_urb (port->read_urb);
+		usb_free_urb(port->read_urb);
 		kfree(port->bulk_in_buffer);
 	}
 	for (i = 0; i < num_bulk_out; ++i) {
 		port = serial->port[i];
 		if (!port)
 			continue;
-		if (port->write_urb)
-			usb_free_urb (port->write_urb);
+		usb_free_urb(port->write_urb);
 		kfree(port->bulk_out_buffer);
 	}
 	for (i = 0; i < num_interrupt_in; ++i) {
 		port = serial->port[i];
 		if (!port)
 			continue;
-		if (port->interrupt_in_urb)
-			usb_free_urb (port->interrupt_in_urb);
+		usb_free_urb(port->interrupt_in_urb);
 		kfree(port->interrupt_in_buffer);
 	}
 	for (i = 0; i < num_interrupt_out; ++i) {
 		port = serial->port[i];
 		if (!port)
 			continue;
-		if (port->interrupt_out_urb)
-			usb_free_urb (port->interrupt_out_urb);
+		usb_free_urb(port->interrupt_out_urb);
 		kfree(port->interrupt_out_buffer);
 	}