[PATCH] serdev: fix memleak on module unload

[Johan Hovold]

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@xxxxxxxxxxxxxxx>	# 4.11
Signed-off-by: Johan Hovold <johan@xxxxxxxxxx>
---
 drivers/tty/serdev/core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/tty/serdev/core.c b/drivers/tty/serdev/core.c
index df93b727e984..9e59f4788589 100644
--- 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);
 
-- 
2.17.1