linux-kernel - [PATCH 3.4 41/43] ocfs2: do not put bh when buffer

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Message-Id: <20140504154229.834633765@linuxfoundation.org>
Date:	Sun,  4 May 2014 11:42:35 -0400
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Alex Chen <alex.chen@...wei.com>,
	Joseph Qi <joseph.qi@...wei.com>,
	Srinivas Eeda <srinivas.eeda@...cle.com>,
	Mark Fasheh <mfasheh@...e.com>,
	Joel Becker <jlbec@...lplan.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: [PATCH 3.4 41/43] ocfs2: do not put bh when buffer_uptodate failed

3.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: alex chen <alex.chen@...wei.com>

commit f7cf4f5bfe073ad792ab49c04f247626b3e38db6 upstream.

Do not put bh when buffer_uptodate failed in ocfs2_write_block and
ocfs2_write_super_or_backup, because it will put bh in b_end_io.
Otherwise it will hit a warning "VFS: brelse: Trying to free free
buffer".

Signed-off-by: Alex Chen <alex.chen@...wei.com>
Reviewed-by: Joseph Qi <joseph.qi@...wei.com>
Reviewed-by: Srinivas Eeda <srinivas.eeda@...cle.com>
Cc: Mark Fasheh <mfasheh@...e.com>
Acked-by: Joel Becker <jlbec@...lplan.org>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 fs/ocfs2/buffer_head_io.c |    2 --
 1 file changed, 2 deletions(-)

--- a/fs/ocfs2/buffer_head_io.c
+++ b/fs/ocfs2/buffer_head_io.c
@@ -90,7 +90,6 @@ int ocfs2_write_block(struct ocfs2_super
 		 * information for this bh as it's not marked locally
 		 * uptodate. */
 		ret = -EIO;
-		put_bh(bh);
 		mlog_errno(ret);
 	}
 
@@ -420,7 +419,6 @@ int ocfs2_write_super_or_backup(struct o
 
 	if (!buffer_uptodate(bh)) {
 		ret = -EIO;
-		put_bh(bh);
 		mlog_errno(ret);
 	}
 


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