1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c
index 484b6a3c9b03..d996038eacfd 100644
--- a/drivers/tty/mxser.c
+++ b/drivers/tty/mxser.c
@@ -1084,6 +1084,10 @@ static void mxser_close(struct tty_struct *tty, struct file *filp)
         mutex_lock(&port->mutex);
         mxser_close_port(port);
         mxser_flush_buffer(tty);
+        if (test_bit(ASYNCB_INITIALIZED, &port->flags)) {
+                if (C_HUPCL(tty))
+                        tty_port_lower_dtr_rts(port);
+        }
         mxser_shutdown_port(port);
         clear_bit(ASYNCB_INITIALIZED, &port->flags);
         mutex_unlock(&port->mutex);