diff --git a/drivers/net/mv643xx_eth.c b/drivers/net/mv643xx_eth.c
index 2fcdb1e1b99d068ab4791752c53f52a42f14f97a..2d488abcf62d7c789a84583dd1ad7564c00ba80c 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);