diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index dba5a03caa263f711ce54944d4a10e3bda9ee43c..05562b3cca451a9bf5549a9edb6c3e9530653797 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -1426,6 +1426,9 @@ static void gsm_dlci_close(struct gsm_dlci *dlci)
 	if (dlci->addr != 0) {
 		tty_port_tty_hangup(&dlci->port, false);
 		kfifo_reset(&dlci->fifo);
+		/* Ensure that gsmtty_open() can return. */
+		tty_port_set_initialized(&dlci->port, 0);
+		wake_up_interruptible(&dlci->port.open_wait);
 	} else
 		dlci->gsm->dead = true;
 	wake_up(&dlci->gsm->event);