serial_core: Get a reference for port->tty in uart_remove_one_port()
Suggested-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 203cb32..3253905 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -2645,6 +2645,7 @@
{
struct uart_state *state = drv->state + uport->line;
struct tty_port *port = &state->port;
+ struct tty_struct *tty;
int ret = 0;
BUG_ON(in_interrupt());
@@ -2673,8 +2674,11 @@
*/
tty_unregister_device(drv->tty_driver, uport->line);
- if (port->tty)
+ tty = tty_port_tty_get(port);
+ if (tty) {
tty_vhangup(port->tty);
+ tty_kref_put(tty);
+ }
/*
* If the port is used as a console, unregister it
