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path: root/drivers/tty/mxser.c
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-rw-r--r--drivers/tty/mxser.c4
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);