[PATCH 4.14 13/61] serdev: fix memleak on module unload

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4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Johan Hovold <johan@xxxxxxxxxx>

commit bc6cf3669d22371f573ab0305b3abf13887c0786 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/tty/serdev/core.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/tty/serdev/core.c
+++ b/drivers/tty/serdev/core.c
@@ -482,6 +482,7 @@ EXPORT_SYMBOL_GPL(__serdev_device_driver
 static void __exit serdev_exit(void)
 {
 	bus_unregister(&serdev_bus_type);
+	ida_destroy(&ctrl_ida);
 }
 module_exit(serdev_exit);
 





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