From 084a66bbb3dad4431692e4e0ebc673c93b23c340 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Mon, 14 May 2012 14:51:22 +0100 Subject: [PATCH] tty: Allow uart_register/unregister/register commit 1e66cded334e6cea596c72f6f650eec351b1e959 upstream. This is legitimate but because we don't clear the drv->state pointer in the unregister code causes a bogus BUG(). Resolves-bug: https://bugzilla.kernel.org/show_bug.cgi?id=42880 Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/serial_core.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index 13056180adf5..8f5d0d8a2f10 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -2283,6 +2283,7 @@ void uart_unregister_driver(struct uart_driver *drv) tty_unregister_driver(p); put_tty_driver(p); kfree(drv->state); + drv->state = NULL; drv->tty_driver = NULL; } -- 2.11.4.GIT