res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
mdev->base = devm_ioremap_resource(&pdev->dev, res);
- if (!mdev->base)
- return -ENOMEM;
+ if (IS_ERR(mdev->base))
+ return PTR_ERR(mdev->base);
ret = of_property_read_string(np, "mbox-name", &mdev->name);
if (ret)