serdev: fix memleak on module unload

Make sure to free all resources associated with the ida on module
exit.

Fixes: cd6484e1830b ("serdev: Introduce new bus for serial attached devices")
Cc: stable <stable@vger.kernel.org>	# 4.11
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serdev/core.c b/drivers/tty/serdev/core.c
index df93b727e984ee3d185fa0f5a42cad09d63a3f65..9e59f4788589c879358ce12507362baec459533d 100644 (file)
--- a/drivers/tty/serdev/core.c
+++ b/drivers/tty/serdev/core.c
@@ -617,6 +617,7 @@ EXPORT_SYMBOL_GPL(__serdev_device_driver_register);
 static void __exit serdev_exit(void)
 {
        bus_unregister(&serdev_bus_type);
+       ida_destroy(&ctrl_ida);
 }
 module_exit(serdev_exit);