linux-kernel - [PATCH -next] pinctrl: nuvoton: Fix return value check in wpcm450_gpio

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Message-ID: <20220317065851.495394-1-zhangjialin11@huawei.com>
Date:   Thu, 17 Mar 2022 14:58:51 +0800
From:   Jialin Zhang <zhangjialin11@...wei.com>
To:     <j.neuschaefer@....net>, <linus.walleij@...aro.org>
CC:     <openbmc@...ts.ozlabs.org>, <linux-gpio@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH -next] pinctrl: nuvoton: Fix return value check in wpcm450_gpio_register()

In case of error, the function devm_platform_ioremap_resource()
returns ERR_PTR() and never returns NULL. The NULL test in the
return value check should be replaced with IS_ERR().

Fixes: a1d1e0e3d80a ("pinctrl: nuvoton: Add driver for WPCM450")
Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Jialin Zhang <zhangjialin11@...wei.com>
---
 drivers/pinctrl/nuvoton/pinctrl-wpcm450.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/pinctrl/nuvoton/pinctrl-wpcm450.c b/drivers/pinctrl/nuvoton/pinctrl-wpcm450.c
index 661aa963e3fc..a71b684b9b44 100644
--- a/drivers/pinctrl/nuvoton/pinctrl-wpcm450.c
+++ b/drivers/pinctrl/nuvoton/pinctrl-wpcm450.c
@@ -1019,8 +1019,9 @@ static int wpcm450_gpio_register(struct platform_device *pdev,
 	int ret;
 
 	pctrl->gpio_base = devm_platform_ioremap_resource(pdev, 0);
-	if (!pctrl->gpio_base)
-		return dev_err_probe(dev, -ENOMEM, "Resource fail for GPIO controller\n");
+	if (IS_ERR(pctrl->gpio_base))
+		return dev_err_probe(dev, PTR_ERR(pctrl->gpio_base),
+				     "Resource fail for GPIO controller\n");
 
 	device_for_each_child_node(dev, child)  {
 		void __iomem *dat = NULL;
-- 
2.25.1