xhci: dbc: add dbgtty request to end of list once it completes

Make sure we move the requests from the read_queue to the end of the
read_pool list, avoiding looping and using the same one request all
the time.

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20240905143300.1959279-3-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/host/xhci-dbgtty.c

@@ -346,7 +346,7 @@ static void dbc_rx_push(struct tasklet_struct *t)
 			port->n_read = 0;
 		}
 
-		list_move(&req->list_pool, &port->read_pool);
+		list_move_tail(&req->list_pool, &port->read_pool);
 	}
 
 	if (do_push)