From ec59ee43b93fb720650ad7fb8df40c155d874fd1 Mon Sep 17 00:00:00 2001
From: Bill Zissimopoulos <billziss@navimatics.com>
Date: Mon, 16 Nov 2015 22:40:02 -0800
Subject: [PATCH] sys: WIP

---
 src/sys/driver.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/sys/driver.c b/src/sys/driver.c
index 1dbba6b6..fb17c438 100644
--- a/src/sys/driver.c
+++ b/src/sys/driver.c
@@ -109,7 +109,11 @@ FspUnload(
     PAGED_CODE();
 
     if (0 != FspDeviceObject)
+    {
+        IoUnregisterFileSystem(FspDeviceObject);
         IoDeleteDevice(FspDeviceObject);
+        FspDeviceObject = 0;
+    }
 }
 
 PDEVICE_OBJECT FspDeviceObject;