linux-kernel - [PATCH] phy: sunplus: Fix an IS_ERR() vs NULL bug in sp_usb_phy

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Message-ID: <20220911054931.122530-1-wupeng58@huawei.com>
Date:   Sun, 11 Sep 2022 05:49:31 +0000
From:   Peng Wu <wupeng58@...wei.com>
To:     <vincent.sunplus@...il.com>, <kishon@...com>, <vkoul@...nel.org>
CC:     <linux-usb@...r.kernel.org>, <inux-phy@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <liwei391@...wei.com>,
        <wupeng58@...wei.com>
Subject: [PATCH] phy: sunplus: Fix an IS_ERR() vs NULL bug in sp_usb_phy_probe

The devm_ioremap() function returns NULL on error, it doesn't return
error pointers.

Fixes: 99d9ccd973852 ("phy: usb: Add USB2.0 phy driver for Sunplus SP7021")
Signed-off-by: Peng Wu <wupeng58@...wei.com>
---
 drivers/phy/sunplus/phy-sunplus-usb2.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/phy/sunplus/phy-sunplus-usb2.c b/drivers/phy/sunplus/phy-sunplus-usb2.c
index 5269968b3060..0e64eb3e6db5 100644
--- a/drivers/phy/sunplus/phy-sunplus-usb2.c
+++ b/drivers/phy/sunplus/phy-sunplus-usb2.c
@@ -256,8 +256,8 @@ static int sp_usb_phy_probe(struct platform_device *pdev)
 	usbphy->moon4_res_mem = platform_get_resource_byname(pdev, IORESOURCE_MEM, "moon4");
 	usbphy->moon4_regs = devm_ioremap(&pdev->dev, usbphy->moon4_res_mem->start,
 					  resource_size(usbphy->moon4_res_mem));
-	if (IS_ERR(usbphy->moon4_regs))
-		return PTR_ERR(usbphy->moon4_regs);
+	if (!usbphy->moon4_regs)
+		return -ENOMEM;
 
 	usbphy->phy_clk = devm_clk_get(&pdev->dev, NULL);
 	if (IS_ERR(usbphy->phy_clk))
-- 
2.17.1