usb: gadget: Fix return value check in r8a66597_probe()

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

Acked-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --git a/drivers/usb/gadget/udc/r8a66597-udc.c b/drivers/usb/gadget/udc/r8a66597-udc.c
index 4600842..de2a871 100644 (file)
--- a/drivers/usb/gadget/udc/r8a66597-udc.c
+++ b/drivers/usb/gadget/udc/r8a66597-udc.c
@@ -1868,8 +1868,8 @@ static int r8a66597_probe(struct platform_device *pdev)
 
        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        reg = devm_ioremap_resource(&pdev->dev, res);
-       if (!reg)
-               return -ENODEV;
+       if (IS_ERR(reg))
+               return PTR_ERR(reg);
 
        ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
        irq = ires->start;