[PATCH 5.10 198/290] USB: gadget: udc: s3c2410_udc: fix return value check in s3c2410_udc_probe()

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

From: Wei Yongjun <redacted>

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 <redacted>
Reported-by: Hulk Robot <redacted>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Krzysztof Kozlowski <redacted>
Signed-off-by: Wei Yongjun <redacted>
Link: https://lore.kernel.org/r/20210305034927.3232386-1-weiyongjun1@huawei.com (local)
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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;
 	}