summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorAlan Cox <alan@linux.intel.com>2012-05-14 14:51:22 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-06-01 15:12:56 +0800
commit3c867337cdb88f7b31f9fcf07003e97d408fcd26 (patch)
treec9c2404210f7273b36f639db36e645d5df21a6cb
parente9fecd74e41f2a9ff04071675be20a5db97723ac (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>
-rw-r--r--drivers/tty/serial/serial_core.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 6bc20d77395e..de5e33fc1290 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -2325,6 +2325,7 @@ 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;
}