ocfs2: fix double kmem_cache_destroy in dlm_init

In dlm_init, if create dlm_lockname_cache failed in
dlm_init_master_caches, it will destroy dlm_lockres_cache which created
before twice.  And this will cause system die when loading modules.

Signed-off-by: Joseph Qi <joseph.qi@huawei.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 6 insertions, 2 deletions

diff --git a/fs/ocfs2/dlm/dlmmaster.c b/fs/ocfs2/dlm/dlmmaster.c
index af3f7aa73e13..ee1f88419cb0 100644
--- a/fs/ocfs2/dlm/dlmmaster.c
+++ b/fs/ocfs2/dlm/dlmmaster.c
@@ -472,11 +472,15 @@ bail:
 
 void dlm_destroy_master_caches(void)
 {
-        if (dlm_lockname_cache)
+        if (dlm_lockname_cache) {
                 kmem_cache_destroy(dlm_lockname_cache);
+                dlm_lockname_cache = NULL;
+        }
 
-        if (dlm_lockres_cache)
+        if (dlm_lockres_cache) {
                 kmem_cache_destroy(dlm_lockres_cache);
+                dlm_lockres_cache = NULL;
+        }
 }
 
 static void dlm_lockres_release(struct kref *kref)