USB: gadget: udc: s3c2410_udc: no need to check return value of debugfs_create functions

When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

Cc: Felipe Balbi <balbi@kernel.org>
Cc: Li Yang <leoyang.li@nxp.com>
Cc: Nicolas Ferre <nicolas.ferre@microchip.com>
Cc: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/gadget/udc/s3c2410_udc.c

@@ -1871,13 +1871,9 @@ static int s3c2410_udc_probe(struct platform_device *pdev)
 	if (retval)
 		goto err_add_udc;
 
-	if (s3c2410_udc_debugfs_root) {
-		udc->regs_info = debugfs_create_file("registers", S_IRUGO,
-				s3c2410_udc_debugfs_root,
-				udc, &s3c2410_udc_debugfs_fops);
-		if (!udc->regs_info)
-			dev_warn(dev, "debugfs file creation failed\n");
-	}
+	udc->regs_info = debugfs_create_file("registers", S_IRUGO,
+					     s3c2410_udc_debugfs_root, udc,
+					     &s3c2410_udc_debugfs_fops);
 
 	dev_dbg(dev, "probe ok\n");
 
@@ -1994,11 +1990,6 @@ static int __init udc_init(void)
 	dprintk(DEBUG_NORMAL, "%s\n", gadget_name);
 
 	s3c2410_udc_debugfs_root = debugfs_create_dir(gadget_name, NULL);
-	if (IS_ERR(s3c2410_udc_debugfs_root)) {
-		pr_err("%s: debugfs dir creation failed %ld\n",
-			gadget_name, PTR_ERR(s3c2410_udc_debugfs_root));
-		s3c2410_udc_debugfs_root = NULL;
-	}
 
 	retval = platform_driver_register(&udc_driver_24x0);
 	if (retval)
@@ -2014,7 +2005,7 @@ err:
 static void __exit udc_exit(void)
 {
 	platform_driver_unregister(&udc_driver_24x0);
-	debugfs_remove(s3c2410_udc_debugfs_root);
+	debugfs_remove_recursive(s3c2410_udc_debugfs_root);
 }
 
 module_init(udc_init);