USB: fotg210-hcd: 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 <[e-mail]>
Cc: Alan Stern <[e-mail]>
Cc: Johan Hovold <[e-mail]>
Cc: Kuppuswamy Sathyanarayanan <[e-mail]>
Cc: Vasyl Gomonovych <[e-mail]>
Cc: Mariusz Skamra <[e-mail]>
Cc: "Gustavo A. R. Silva" <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/host/fotg210-hcd.c

···
 static inline void create_debug_files(struct fotg210_hcd *fotg210)
 {
 	struct usb_bus *bus = &fotg210_to_hcd(fotg210)->self;
+	struct dentry *root;
 
-	fotg210->debug_dir = debugfs_create_dir(bus->bus_name,
-			fotg210_debug_root);
-	if (!fotg210->debug_dir)
-		return;
+	root = debugfs_create_dir(bus->bus_name, fotg210_debug_root);
+	fotg210->debug_dir = root;
 
-	if (!debugfs_create_file("async", S_IRUGO, fotg210->debug_dir, bus,
-			&debug_async_fops))
-		goto file_error;
-
-	if (!debugfs_create_file("periodic", S_IRUGO, fotg210->debug_dir, bus,
-			&debug_periodic_fops))
-		goto file_error;
-
-	if (!debugfs_create_file("registers", S_IRUGO, fotg210->debug_dir, bus,
-			&debug_registers_fops))
-		goto file_error;
-
-	return;
-
-file_error:
-	debugfs_remove_recursive(fotg210->debug_dir);
+	debugfs_create_file("async", S_IRUGO, root, bus, &debug_async_fops);
+	debugfs_create_file("periodic", S_IRUGO, root, bus,
+			    &debug_periodic_fops);
+	debugfs_create_file("registers", S_IRUGO, root, bus,
+			    &debug_registers_fops);
 }
 
 static inline void remove_debug_files(struct fotg210_hcd *fotg210)
···
 			sizeof(struct fotg210_itd));
 
 	fotg210_debug_root = debugfs_create_dir("fotg210", usb_debug_root);
-	if (!fotg210_debug_root) {
-		retval = -ENOENT;
-		goto err_debug;
-	}
 
 	retval = platform_driver_register(&fotg210_hcd_driver);
 	if (retval < 0)
···
 clean:
 	debugfs_remove(fotg210_debug_root);
 	fotg210_debug_root = NULL;
-err_debug:
+
 	clear_bit(USB_EHCI_LOADED, &usb_hcds_loaded);
 	return retval;
 }