From: Lothar Waßmann <LW@KARO-electronics.de>
Date: Thu, 21 Mar 2013 02:20:11 +0000 (+0000)
Subject: net: ethernet: cpsw: fix erroneous condition in error check
X-Git-Tag: accepted/tizen/common/20141203.182822~2602^2~15
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ce16294fda230c787ce5c35f61b2f80d14d70a72;p=platform%2Fkernel%2Flinux-arm64.git

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@KARO-electronics.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c
index 75c4855..df32a09 100644
--- a/drivers/net/ethernet/ti/cpsw.c
+++ b/drivers/net/ethernet/ti/cpsw.c
@@ -1364,7 +1364,7 @@ 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;