diff options
| author |   Alan Cox <alan@linux.intel.com> | 2012-05-14 14:51:22 +0100 |
|---|---|---|
| committer |   Ben Hutchings <ben@decadent.org.uk> | 2012-05-31 00:43:42 +0100 |
| commit | b89d788669db009d58b2f5e9988caaaf7df9e4ab (patch) | |
| tree | e79eedc3fcddd322bddfd56f3a6edae847cfd732 | |
| parent | 8fd4242d5ce7514591eff1b1170ab253b215a787 (diff) | |
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 <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
| -rw-r--r-- | drivers/tty/serial/serial_core.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index 0406d7ff505..af5ffb9154d 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -2305,6 +2305,7 @@ 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; } |