[PATCH net] net: nixge: Fix a signedness bug in nixge_probe()

[Dan Carpenter]

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.carpen...@oracle.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