[patch 23/57] firewire: fix struct fw_node memory leak

[Greg KH]

2.6.27-stable review patch.  If anyone has any objections, please let us know.

------------------
From: Jay Fenlason <fenlason@xxxxxxxxxx>

commit 77e557191701afa55ae7320d42ad6458a2ad292e upstream

With the bus_resets patch applied, it is easy to see this memory leak
by repeatedly resetting the firewire bus while running slabtop in
another window.  Just watch kmalloc-32 grow and grow...

Signed-off-by: Jay Fenlason <fenlason@xxxxxxxxxx>
Signed-off-by: Stefan Richter <stefanr@xxxxxxxxxxxxxxxxx>

---
 drivers/firewire/fw-topology.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

--- a/drivers/firewire/fw-topology.c
+++ b/drivers/firewire/fw-topology.c
@@ -413,7 +413,7 @@ static void
 update_tree(struct fw_card *card, struct fw_node *root)
 {
 	struct list_head list0, list1;
-	struct fw_node *node0, *node1;
+	struct fw_node *node0, *node1, *next1;
 	int i, event;
 
 	INIT_LIST_HEAD(&list0);
@@ -485,7 +485,9 @@ update_tree(struct fw_card *card, struct
 		}
 
 		node0 = fw_node(node0->link.next);
-		node1 = fw_node(node1->link.next);
+		next1 = fw_node(node1->link.next);
+		fw_node_put(node1);
+		node1 = next1;
 	}
 }
 

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