driver core: platform: Propagate error from insert_resource()

Since insert_resource() might return an error we don't need
to shadow its error code and would safely propagate to the user.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/base/platform.c

@@ -438,12 +438,14 @@ int platform_device_add(struct platform_device *pdev)
 				p = &ioport_resource;
 		}
 
-		if (p && insert_resource(p, r)) {
+		if (p) {
+			ret = insert_resource(p, r);
+			if (ret) {
 				dev_err(&pdev->dev, "failed to claim resource %d: %pR\n", i, r);
-			ret = -EBUSY;
 				goto failed;
 			}
 		}
+	}
 
 	pr_debug("Registering platform device '%s'. Parent at %s\n",
 		 dev_name(&pdev->dev), dev_name(pdev->dev.parent));