linux-kernel - [BUGFIX PATCH] net: ethernet: cpsw: fix erroneous condition in error check

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Message-Id: <1363868411-25318-1-git-send-email-LW@KARO-electronics.de>
Date:	Thu, 21 Mar 2013 13:20:11 +0100
From:	Lothar Waßmann <LW@...O-electronics.de>
To:	Richard Cochran <richardcochran@...il.com>
Cc:	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, Mugunthan V N <mugunthanvnm@...com>,
	Lothar Waßmann <LW@...O-electronics.de>
Subject: [BUGFIX PATCH] net: ethernet: cpsw: fix erroneous condition in error check

The error check in cpsw_probe_dt() has an '&&' where an '||' is
meant to be. This causes a NULL pointer dereference when incomplet DT
data is passed to the driver ('phy_id' property for cpsw_emac1
missing).


Signed-off-by: Lothar Waßmann <LW@...O-electronics.de>
---
 drivers/net/ethernet/ti/cpsw.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c
index 5ceaa4c3..7aebc0c 100644
--- a/drivers/net/ethernet/ti/cpsw.c
+++ b/drivers/net/ethernet/ti/cpsw.c
@@ -1504,7 +1504,7 @@ static int cpsw_probe_dt(struct cpsw_platform_data *data,
 		struct platform_device *mdio;
 
 		parp = of_get_property(slave_node, "phy_id", &lenp);
-		if ((parp == NULL) && (lenp != (sizeof(void *) * 2))) {
+		if ((parp == NULL) || (lenp != (sizeof(void *) * 2))) {
 			pr_err("Missing slave[%d] phy_id property\n", i);
 			ret = -EINVAL;
 			goto error_ret;
-- 
1.7.2.5

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