| Date | Mon, 28 May 2012 04:13:00 +0100 | From | Ben Hutchings <> | Subject | [ 058/117] tty: Allow uart_register/unregister/register |
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3.2-stable review patch. If anyone has any objections, please let me know.
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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> Signed-off-by: Ben Hutchings <ben@decadent.org.uk> --- 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 59fb3ba..a21dc8e 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -2282,6 +2282,7 @@ 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; }
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