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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>
This commit is contained in:
Geert Uytterhoeven 2014-03-17 14:10:58 +01:00 committed by Greg Kroah-Hartman
parent 63e3ad3252
commit 4c6d5b4d53
1 changed files with 5 additions and 1 deletions
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6
drivers/tty/serial/serial_core.c
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@ -2645,6 +2645,7 @@ int uart_remove_one_port(struct uart_driver *drv, struct uart_port *uport)
{
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 @@ int uart_remove_one_port(struct uart_driver *drv, struct uart_port *uport)
*/
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