From f66832dae0ad61732d07c40a3c81adbc935fa1b3 Mon Sep 17 00:00:00 2001
From: Viresh Kumar <viresh.kumar@linaro.org>
Date: Fri, 14 Nov 2014 17:25:01 +0530
Subject: [PATCH] greybus: nullify dangling pointers

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
---
 drivers/staging/greybus/ap.c      | 1 +
 drivers/staging/greybus/debugfs.c | 1 +
 drivers/staging/greybus/gbuf.c    | 1 +
 3 files changed, 3 insertions(+)

diff --git a/drivers/staging/greybus/ap.c b/drivers/staging/greybus/ap.c
index a8cd7e7cdd60..9d743f28e08e 100644
--- a/drivers/staging/greybus/ap.c
+++ b/drivers/staging/greybus/ap.c
@@ -367,6 +367,7 @@ int gb_ap_init(void)
 void gb_ap_exit(void)
 {
 	destroy_workqueue(ap_workqueue);
+	ap_workqueue = NULL;
 }
 
 
diff --git a/drivers/staging/greybus/debugfs.c b/drivers/staging/greybus/debugfs.c
index ef292f43db45..4755a36d0522 100644
--- a/drivers/staging/greybus/debugfs.c
+++ b/drivers/staging/greybus/debugfs.c
@@ -26,4 +26,5 @@ int gb_debugfs_init(void)
 void gb_debugfs_cleanup(void)
 {
 	debugfs_remove_recursive(gb_debug_root);
+	gb_debug_root = NULL;
 }
diff --git a/drivers/staging/greybus/gbuf.c b/drivers/staging/greybus/gbuf.c
index 8b5a438e3b01..d5cfb38d6d75 100644
--- a/drivers/staging/greybus/gbuf.c
+++ b/drivers/staging/greybus/gbuf.c
@@ -136,4 +136,5 @@ int gb_gbuf_init(void)
 void gb_gbuf_exit(void)
 {
 	kmem_cache_destroy(gbuf_head_cache);
+	gbuf_head_cache = NULL;
 }