linux-kernel - [PATCH AUTOSEL 4.19 191/671] mdio_bus: Fix PTR_ERR() usage after initialization to constant

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Date:   Thu, 16 Jan 2020 11:51:40 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     YueHaibing <yuehaibing@...wei.com>,
        "David S . Miller" <davem@...emloft.net>,
        Sasha Levin <sashal@...nel.org>, netdev@...r.kernel.org
Subject: [PATCH AUTOSEL 4.19 191/671] mdio_bus: Fix PTR_ERR() usage after initialization to constant

From: YueHaibing <yuehaibing@...wei.com>

[ Upstream commit 780feae7eb69388c8d8b661cda6706b0dc0f642b ]

Fix coccinelle warning:

./drivers/net/phy/mdio_bus.c:51:5-12: ERROR: PTR_ERR applied after initialization to constant on line 44
./drivers/net/phy/mdio_bus.c:52:5-12: ERROR: PTR_ERR applied after initialization to constant on line 44

fix this by using IS_ERR before PTR_ERR

Fixes: bafbdd527d56 ("phylib: Add device reset GPIO support")
Signed-off-by: YueHaibing <yuehaibing@...wei.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/net/phy/mdio_bus.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index c5588d4508f9..5c89a310359d 100644
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -56,11 +56,12 @@ static int mdiobus_register_gpiod(struct mdio_device *mdiodev)
 		gpiod = fwnode_get_named_gpiod(&mdiodev->dev.of_node->fwnode,
 					       "reset-gpios", 0, GPIOD_OUT_LOW,
 					       "PHY reset");
-	if (PTR_ERR(gpiod) == -ENOENT ||
-	    PTR_ERR(gpiod) == -ENOSYS)
-		gpiod = NULL;
-	else if (IS_ERR(gpiod))
-		return PTR_ERR(gpiod);
+	if (IS_ERR(gpiod)) {
+		if (PTR_ERR(gpiod) == -ENOENT || PTR_ERR(gpiod) == -ENOSYS)
+			gpiod = NULL;
+		else
+			return PTR_ERR(gpiod);
+	}
 
 	mdiodev->reset = gpiod;
 
-- 
2.20.1