From: Geert Uytterhoeven <geert+renesas@xxxxxxxxxxxxxx> If the serial port being removed is used as a console, it must also be unregistered from the console subsystem using unregister_console(). uart_ops.release_port() will release resources (e.g. iounmap() the serial port registers), causing a crash on subsequent kernel output if the console is still registered. Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxxxxxxx> --- drivers/tty/serial/serial_core.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index ece2049bd270..8ece7f14d89d 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -2677,6 +2677,12 @@ int uart_remove_one_port(struct uart_driver *drv, struct uart_port *uport) tty_vhangup(port->tty); /* + * If the port is used as a console, unregister it + */ + if (uart_console(uport)) + unregister_console(uport->cons); + + /* * Free the port IO and memory resources, if any. */ if (uport->type != PORT_UNKNOWN) -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
