1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/tty/serial/altera_uart.c b/drivers/tty/serial/altera_uart.c
index fa638db9a98c..6431472aeb1f 100644
--- a/drivers/tty/serial/altera_uart.c
+++ b/drivers/tty/serial/altera_uart.c
@@ -231,7 +231,9 @@ static void altera_uart_rx_chars(struct altera_uart *pp)
                                  flag);
         }
 
+        spin_unlock(&port->lock);
         tty_flip_buffer_push(&port->state->port);
+        spin_lock(&port->lock);
 }
 
 static void altera_uart_tx_chars(struct altera_uart *pp)