firewire: fix struct fw_node memory leak

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@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>

diff --git a/drivers/firewire/fw-topology.c b/drivers/firewire/fw-topology.c
index c1b81077c4a82b6e15bc528b314dfa87a73e1c35..5e204713002d843d34dcc19aecec530d00ea577a 100644 (file)
--- 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 fw_node *root)
                }
 
                node0 = fw_node(node0->link.next);
-               node1 = fw_node(node1->link.next);
+               next1 = fw_node(node1->link.next);
+               fw_node_put(node1);
+               node1 = next1;
        }
 }