Commit 5f5c9ae5 authored Feb 28, 2014 by Geert Uytterhoeven Committed by Greg Kroah-Hartman Feb 28, 2014

serial_core: Unregister console in uart_remove_one_port()

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@linux-m68k.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent a3c1fa99

drivers/tty/serial/serial_core.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -2676,6 +2676,12 @@ int uart_remove_one_port(struct uart_driver drv, struct uart_port uport)
		if (port->tty)
		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.
		*/