@@ -215,9 +215,17 @@ static void tcf_chain_flush(struct tcf_chain *chain)
static void tcf_chain_destroy(struct tcf_chain *chain)
{
- list_del(&chain->list);
+ /* May be already removed from the list by the previous call. */
+ if (!list_empty(&chain->list))
+ list_del_init(&chain->list);
+
tcf_chain_flush(chain);
- kfree(chain);
+
+ /* There might still be a reference held when we got here from
+ * tcf_block_put. Wait for the user to drop reference before free.
+ */
+ if (!chain->refcnt)
+ kfree(chain);
}
struct tcf_chain *tcf_chain_get(struct tcf_block *block, u32 chain_index,