| | Date | Sun, 27 May 2012 10:05:08 +0900 | | From | Greg KH <> | | Subject | [ 45/94] tty: Allow uart_register/unregister/register |
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3.3-stable review patch. If anyone has any objections, please let me know.
------------------ From: Alan Cox <alan@linux.intel.com>
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 <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/tty/serial/serial_core.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -2283,6 +2283,7 @@ void uart_unregister_driver(struct uart_ tty_unregister_driver(p); put_tty_driver(p); kfree(drv->state); + drv->state = NULL; drv->tty_driver = NULL; }
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