jbd2: only create debugfs and stats entries if init is successful

jbd2 debugfs and stats entries should only be created if cache initialisation
is successful.  At the moment they are being created unconditionally which
will leave them dangling if cache (and hence module) initialisation fails.

Signed-off-by: Duane Griffin <duaneg@dghda.com>
Cc: <linux-ext4@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

1 files changed, 5 insertions, 3 deletions

diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index d707a219e21b..64356e85a10f 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -2307,10 +2307,12 @@ static int __init journal_init(void)
         BUILD_BUG_ON(sizeof(struct journal_superblock_s) != 1024);
 
         ret = journal_init_caches();
-        if (ret != 0)
+        if (ret == 0) {
+                jbd2_create_debugfs_entry();
+                jbd2_create_jbd_stats_proc_entry();
+        } else {
                 jbd2_journal_destroy_caches();
-        jbd2_create_debugfs_entry();
-        jbd2_create_jbd_stats_proc_entry();
+        }
         return ret;
 }