From: Markus Elfring <[email protected]>
Date: Sun, 5 Jul 2015 14:54:33 +0200

The iput() function was called in one case by the ocfs2_journal_shutdown()
function during input parameter validation even if the passed
variable contained still a null pointer.

* Return directly if received values indicate that at the beginning.

* Delete the unnecessary jump label "done".

* Drop unnecessary initialisations for the variables "inode",
  "journal" and "num_running_trans" then.

Signed-off-by: Markus Elfring <[email protected]>
---
 fs/ocfs2/journal.c | 15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)

diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c
index 7bb50f4..f13e6fdb 100644
--- a/fs/ocfs2/journal.c
+++ b/fs/ocfs2/journal.c
@@ -951,22 +951,20 @@ static int ocfs2_journal_toggle_dirty(struct ocfs2_super 
*osb,
  */
 void ocfs2_journal_shutdown(struct ocfs2_super *osb)
 {
-       struct ocfs2_journal *journal = NULL;
+       struct ocfs2_journal *journal;
        int status = 0;
-       struct inode *inode = NULL;
-       int num_running_trans = 0;
+       struct inode *inode;
+       int num_running_trans;
 
        BUG_ON(!osb);
 
        journal = osb->journal;
        if (!journal)
-               goto done;
-
-       inode = journal->j_inode;
-
+               return;
        if (journal->j_state != OCFS2_JOURNAL_LOADED)
-               goto done;
+               return;
 
+       inode = journal->j_inode;
        /* need to inc inode use count - jbd2_journal_destroy will iput. */
        if (!igrab(inode))
                BUG();
@@ -1025,7 +1023,6 @@ void ocfs2_journal_shutdown(struct ocfs2_super *osb)
        journal->j_state = OCFS2_JOURNAL_FREE;
 
 //     up_write(&journal->j_trans_barrier);
-done:
        iput(inode);
 }
 
-- 
2.4.5

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