From f25247d88708ff0666573541923a7339845403de Mon Sep 17 00:00:00 2001 From: Colin Ian King Date: Wed, 9 Jun 2021 18:17:48 +0100 Subject: [PATCH] net: phy: realtek: net: Fix less than zero comparison of a u16 The comparisons of the u16 values priv->phycr1 and priv->phycr2 to less than zero always false because they are unsigned. Fix this by using an int for the assignment and less than zero check. Addresses-Coverity: ("Unsigned compared against 0") Fixes: 0a4355c2b7f8 ("net: phy: realtek: add dt property to disable CLKOUT clock") Fixes: d90db36a9e74 ("net: phy: realtek: add dt property to enable ALDPS mode") Signed-off-by: Colin Ian King Signed-off-by: David S. Miller --- drivers/net/phy/realtek.c | 17 +++++++++-------- 1 file changed, 9 insertions(+), 8 deletions(-) diff --git a/drivers/net/phy/realtek.c b/drivers/net/phy/realtek.c index 1b844a06fe72..11be60333fa8 100644 --- a/drivers/net/phy/realtek.c +++ b/drivers/net/phy/realtek.c @@ -94,24 +94,25 @@ static int rtl821x_probe(struct phy_device *phydev) { struct device *dev = &phydev->mdio.dev; struct rtl821x_priv *priv; + int ret; priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; - priv->phycr1 = phy_read_paged(phydev, 0xa43, RTL8211F_PHYCR1); - if (priv->phycr1 < 0) - return priv->phycr1; + ret = phy_read_paged(phydev, 0xa43, RTL8211F_PHYCR1); + if (ret < 0) + return ret; - priv->phycr1 &= (RTL8211F_ALDPS_PLL_OFF | RTL8211F_ALDPS_ENABLE | RTL8211F_ALDPS_XTAL_OFF); + priv->phycr1 = ret & (RTL8211F_ALDPS_PLL_OFF | RTL8211F_ALDPS_ENABLE | RTL8211F_ALDPS_XTAL_OFF); if (of_property_read_bool(dev->of_node, "realtek,aldps-enable")) priv->phycr1 |= RTL8211F_ALDPS_PLL_OFF | RTL8211F_ALDPS_ENABLE | RTL8211F_ALDPS_XTAL_OFF; - priv->phycr2 = phy_read_paged(phydev, 0xa43, RTL8211F_PHYCR2); - if (priv->phycr2 < 0) - return priv->phycr2; + ret = phy_read_paged(phydev, 0xa43, RTL8211F_PHYCR2); + if (ret < 0) + return ret; - priv->phycr2 &= RTL8211F_CLKOUT_EN; + priv->phycr2 = ret & RTL8211F_CLKOUT_EN; if (of_property_read_bool(dev->of_node, "realtek,clkout-disable")) priv->phycr2 &= ~RTL8211F_CLKOUT_EN; -- 2.11.0