linux-kernel - [50/53] batman-adv: remove references for global tt entries

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Message-Id: <20111123002557.611213284@clark.kroah.org>
Date:	Tue, 22 Nov 2011 16:25:50 -0800
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk,
	Simon Wunderlich <siwu@....tu-chemnitz.de>,
	Marek Lindner <lindner_marek@...oo.de>
Subject: [50/53] batman-adv: remove references for global tt entries

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

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

From: Simon Wunderlich <simon.wunderlich@...03.tu-chemnitz.de>

commit 531027fcddbcf81c9937dd04f08a7e8f11fd47d2 upstream.

struct tt_global_entry holds a reference to an orig_node which must be
decremented before deallocating the structure.

Signed-off-by: Simon Wunderlich <siwu@....tu-chemnitz.de>
Tested-by: Alexey Fisher <bug-track@...her-privat.net>
Signed-off-by: Marek Lindner <lindner_marek@...oo.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 net/batman-adv/translation-table.c |   14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

--- a/net/batman-adv/translation-table.c
+++ b/net/batman-adv/translation-table.c
@@ -137,10 +137,22 @@ static void tt_local_entry_free_ref(stru
 		kfree_rcu(tt_local_entry, rcu);
 }
 
+static void tt_global_entry_free_rcu(struct rcu_head *rcu)
+{
+	struct tt_global_entry *tt_global_entry;
+
+	tt_global_entry = container_of(rcu, struct tt_global_entry, rcu);
+
+	if (tt_global_entry->orig_node)
+		orig_node_free_ref(tt_global_entry->orig_node);
+
+	kfree(tt_global_entry);
+}
+
 static void tt_global_entry_free_ref(struct tt_global_entry *tt_global_entry)
 {
 	if (atomic_dec_and_test(&tt_global_entry->refcount))
-		kfree_rcu(tt_global_entry, rcu);
+		call_rcu(&tt_global_entry->rcu, tt_global_entry_free_rcu);
 }
 
 static void tt_local_event(struct bat_priv *bat_priv, const uint8_t *addr,


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