linux-kernel - [PATCH 5.11 194/306] USB: gadget: udc: s3c2410_udc: fix return value check in s3c2410_udc

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Date:   Mon, 15 Mar 2021 14:54:17 +0100
From:   gregkh@...uxfoundation.org
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Hulk Robot <hulkci@...wei.com>,
        Arnd Bergmann <arnd@...db.de>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        Wei Yongjun <weiyongjun1@...wei.com>
Subject: [PATCH 5.11 194/306] USB: gadget: udc: s3c2410_udc: fix return value check in s3c2410_udc_probe()

From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

From: Wei Yongjun <weiyongjun1@...wei.com>

commit 414c20df7d401bcf1cb6c13d2dd944fb53ae4acf upstream.

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: 188db4435ac6 ("usb: gadget: s3c: use platform resources")
Cc: stable <stable@...r.kernel.org>
Reported-by: Hulk Robot <hulkci@...wei.com>
Reviewed-by: Arnd Bergmann <arnd@...db.de>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
Signed-off-by: Wei Yongjun <weiyongjun1@...wei.com>
Link: https://lore.kernel.org/r/20210305034927.3232386-1-weiyongjun1@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/usb/gadget/udc/s3c2410_udc.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/usb/gadget/udc/s3c2410_udc.c
+++ b/drivers/usb/gadget/udc/s3c2410_udc.c
@@ -1773,8 +1773,8 @@ static int s3c2410_udc_probe(struct plat
 	udc_info = dev_get_platdata(&pdev->dev);
 
 	base_addr = devm_platform_ioremap_resource(pdev, 0);
-	if (!base_addr) {
-		retval = -ENOMEM;
+	if (IS_ERR(base_addr)) {
+		retval = PTR_ERR(base_addr);
 		goto err_mem;
 	}