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serial_core: Unregister console in uart_remove_one_port()

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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>
This commit is contained in:
Geert Uytterhoeven 2014-02-28 14:21:32 +01:00 committed by Greg Kroah-Hartman
parent a3c1fa99f4
commit 5f5c9ae56c
1 changed files with 6 additions and 0 deletions
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6
drivers/tty/serial/serial_core.c
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@ -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.
*/