netdev - [PATCH net-next v2 1/7] net: phy: at803x: Avoid comparison is always false warning

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Date:   Tue,  7 Jul 2020 03:49:33 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     David Miller <davem@...emloft.net>
Cc:     netdev <netdev@...r.kernel.org>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Andrew Lunn <andrew@...n.ch>, Jakub Kicinski <kuba@...nel.org>
Subject: [PATCH net-next v2 1/7] net: phy: at803x: Avoid comparison is always false warning

By placing the GENMASK value into an unsigned int and then passing it
to PREF_FIELD, the type is reduces down from ULL. Given the reduced
size of the type, the range checks in PREP_FAIL() are always true, and
-Wtype-limits then gives a warning.

By skipping the intermediate variable, the warning can be avoided.

Reviewed-by: Jakub Kicinski <kuba@...nel.org>
Signed-off-by: Andrew Lunn <andrew@...n.ch>
---
 drivers/net/phy/at803x.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/net/phy/at803x.c b/drivers/net/phy/at803x.c
index 97cbe593f0ea..96c61aa75bd7 100644
--- a/drivers/net/phy/at803x.c
+++ b/drivers/net/phy/at803x.c
@@ -400,8 +400,8 @@ static int at803x_parse_dt(struct phy_device *phydev)
 {
 	struct device_node *node = phydev->mdio.dev.of_node;
 	struct at803x_priv *priv = phydev->priv;
-	unsigned int sel, mask;
 	u32 freq, strength;
+	unsigned int sel;
 	int ret;
 
 	if (!IS_ENABLED(CONFIG_OF_MDIO))
@@ -409,7 +409,6 @@ static int at803x_parse_dt(struct phy_device *phydev)
 
 	ret = of_property_read_u32(node, "qca,clk-out-frequency", &freq);
 	if (!ret) {
-		mask = AT803X_CLK_OUT_MASK;
 		switch (freq) {
 		case 25000000:
 			sel = AT803X_CLK_OUT_25MHZ_XTAL;
@@ -428,8 +427,8 @@ static int at803x_parse_dt(struct phy_device *phydev)
 			return -EINVAL;
 		}
 
-		priv->clk_25m_reg |= FIELD_PREP(mask, sel);
-		priv->clk_25m_mask |= mask;
+		priv->clk_25m_reg |= FIELD_PREP(AT803X_CLK_OUT_MASK, sel);
+		priv->clk_25m_mask |= AT803X_CLK_OUT_MASK;
 
 		/* Fixup for the AR8030/AR8035. This chip has another mask and
 		 * doesn't support the DSP reference. Eg. the lowest bit of the
-- 
2.27.0.rc2