From 50a749c1f2fc8f03232c174c9dbc78a78f9bebfd Mon Sep 17 00:00:00 2001
From: Dan Carpenter <error27@gmail.com>
Date: Fri, 23 Jul 2010 01:05:05 +0000
Subject: [PATCH] mv643xx_eth: potential null dereference

We assume that "pd" can be null on the previous line, and throughout the
function so we should check it here as well.  This was introduced by
9b2c2ff7a1c0 "mv643xx_eth: use sw csum for big packets"

Signed-off-by: Dan Carpenter <error27@gmail.com>
Acked-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/mv643xx_eth.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/mv643xx_eth.c b/drivers/net/mv643xx_eth.c
index 2fcdb1e1b99d..2d488abcf62d 100644
--- a/drivers/net/mv643xx_eth.c
+++ b/drivers/net/mv643xx_eth.c
@@ -2675,7 +2675,8 @@ static int mv643xx_eth_shared_probe(struct platform_device *pdev)
 	 * Detect hardware parameters.
 	 */
 	msp->t_clk = (pd != NULL && pd->t_clk != 0) ? pd->t_clk : 133000000;
-	msp->tx_csum_limit = pd->tx_csum_limit ? pd->tx_csum_limit : 9 * 1024;
+	msp->tx_csum_limit = (pd != NULL && pd->tx_csum_limit) ?
+					pd->tx_csum_limit : 9 * 1024;
 	infer_hw_params(msp);
 
 	platform_set_drvdata(pdev, msp);
-- 
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