linux-kernel - [PATCH 4.9 203/271] net: hisilicon: Fix signedness bug in hix5hd2_dev

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Message-Id: <20200128135907.674070948@linuxfoundation.org>
Date:   Tue, 28 Jan 2020 15:05:52 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dan Carpenter <dan.carpenter@...cle.com>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.9 203/271] net: hisilicon: Fix signedness bug in hix5hd2_dev_probe()

From: Dan Carpenter <dan.carpenter@...cle.com>

[ Upstream commit 002dfe8085255b7bf1e0758c3d195c5412d35be9 ]

The "priv->phy_mode" variable is an enum and in this context GCC will
treat it as unsigned to the error handling will never trigger.

Fixes: 57c5bc9ad7d7 ("net: hisilicon: add hix5hd2 mac driver")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/ethernet/hisilicon/hix5hd2_gmac.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/hisilicon/hix5hd2_gmac.c b/drivers/net/ethernet/hisilicon/hix5hd2_gmac.c
index e69a6bed31a95..dd24c352b2000 100644
--- a/drivers/net/ethernet/hisilicon/hix5hd2_gmac.c
+++ b/drivers/net/ethernet/hisilicon/hix5hd2_gmac.c
@@ -929,7 +929,7 @@ static int hix5hd2_dev_probe(struct platform_device *pdev)
 		goto err_free_mdio;
 
 	priv->phy_mode = of_get_phy_mode(node);
-	if (priv->phy_mode < 0) {
+	if ((int)priv->phy_mode < 0) {
 		netdev_err(ndev, "not find phy-mode\n");
 		ret = -EINVAL;
 		goto err_mdiobus;
-- 
2.20.1