From patchwork series 482252

https://patchwork.ozlabs.org//project/linuxppc-dev/list/?series=482252

Author: Fox Snowpatch

arch/powerpc/platforms/44x/warp.c

@@ -293,6 +293,8 @@ static int pika_dtm_thread(void __iomem *fpga)
 		schedule_timeout(HZ);
 	}
 
+	put_device(&client->dev);
+
 	return 0;
 }