diff --git a/drivers/tty/serial/pmac_zilog.c b/drivers/tty/serial/pmac_zilog.c
index e3a919328695..f49d6052d11b 100644
--- a/drivers/tty/serial/pmac_zilog.c
+++ b/drivers/tty/serial/pmac_zilog.c
@@ -444,7 +444,7 @@ static irqreturn_t pmz_interrupt(int irq, void *dev_id)
  skip_a:
 	uart_port_unlock(&uap_a->port);
 	if (push)
-		tty_flip_buffer_push(&uap->port.state->port);
+		tty_flip_buffer_push(&uap_a->port.state->port);
 
 	if (!uap_b)
 		goto out;
@@ -469,7 +469,7 @@ static irqreturn_t pmz_interrupt(int irq, void *dev_id)
  skip_b:
 	uart_port_unlock(&uap_b->port);
 	if (push)
-		tty_flip_buffer_push(&uap->port.state->port);
+		tty_flip_buffer_push(&uap_b->port.state->port);
 
  out:
 	return rc;