From 954415e33ed6cfa932c13e8c2460bd05e50723b5 Mon Sep 17 00:00:00 2001
From: Stephen Hemminger <shemminger@vyatta.com>
Date: Sat, 9 Feb 2008 23:26:53 -0800
Subject: [PATCH] [PKT_SCHED] ematch: tcf_em_destroy robustness

Make the code in tcf_em_tree_destroy more robust and cleaner:
 * Don't need to cast pointer to kfree() or avoid passing NULL.
 * After freeing the tree, clear the pointer to avoid possible problems
from repeated free.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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