diff --git a/drivers/usb/gadget/function/f_midi.c b/drivers/usb/gadget/function/f_midi.c
index f23a6f7..a832d27 100644
--- a/drivers/usb/gadget/function/f_midi.c
+++ b/drivers/usb/gadget/function/f_midi.c
@@ -1265,6 +1265,7 @@
 	mutex_lock(&opts->lock);
 	kfifo_free(&midi->in_req_fifo);
 	kfree(midi);
+	opts->func_inst.f = NULL;
 	--opts->refcnt;
 	mutex_unlock(&opts->lock);
 }