1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c
index 0c880f17d27e..88dac3b79369 100644
--- a/drivers/tty/tty_port.c
+++ b/drivers/tty/tty_port.c
@@ -33,7 +33,9 @@ static int tty_port_default_receive_buf(struct tty_port *port,
         if (!disc)
                 return 0;
 
+        mutex_lock(&tty->atomic_write_lock);
         ret = tty_ldisc_receive_buf(disc, p, (char *)f, count);
+        mutex_unlock(&tty->atomic_write_lock);
 
         tty_ldisc_deref(disc);