netdev - [PATCH net] net: nixge: Fix a signedness bug in nixge

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Message-ID: <20190925110524.GP3264@mwanda>
Date:   Wed, 25 Sep 2019 14:05:24 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     "David S. Miller" <davem@...emloft.net>,
        Moritz Fischer <mdf@...nel.org>
Cc:     Andrew Lunn <andrew@...n.ch>, Alex Williams <alex.williams@...com>,
        Luis Chamberlain <mcgrof@...nel.org>, netdev@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: [PATCH net] net: nixge: Fix a signedness bug in nixge_probe()

The "priv->phy_mode" is an enum and in this context GCC will treat it
as an unsigned int so it can never be less than zero.

Fixes: 492caffa8a1a ("net: ethernet: nixge: Add support for National Instruments XGE netdev")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
---
 drivers/net/ethernet/ni/nixge.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/ni/nixge.c b/drivers/net/ethernet/ni/nixge.c
index 0b384f97d2fd..2761f3a3ae50 100644
--- a/drivers/net/ethernet/ni/nixge.c
+++ b/drivers/net/ethernet/ni/nixge.c
@@ -1347,7 +1347,7 @@ static int nixge_probe(struct platform_device *pdev)
 	}
 
 	priv->phy_mode = of_get_phy_mode(pdev->dev.of_node);
-	if (priv->phy_mode < 0) {
+	if ((int)priv->phy_mode < 0) {
 		netdev_err(ndev, "not find \"phy-mode\" property\n");
 		err = -EINVAL;
 		goto unregister_mdio;
-- 
2.20.1