USB: uhci: 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: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/host/uhci-hcd.c

@@ -590,14 +590,10 @@ static int uhci_start(struct usb_hcd *hcd)
 	init_waitqueue_head(&uhci->waitqh);
 
 #ifdef UHCI_DEBUG_OPS
-	dentry = debugfs_create_file(hcd->self.bus_name,
-			S_IFREG|S_IRUGO|S_IWUSR, uhci_debugfs_root,
-			uhci, &uhci_debug_operations);
-	if (!dentry) {
-		dev_err(uhci_dev(uhci), "couldn't create uhci debugfs entry\n");
-		return -ENOMEM;
-	}
-	uhci->dentry = dentry;
+	uhci->dentry = debugfs_create_file(hcd->self.bus_name,
+					   S_IFREG|S_IRUGO|S_IWUSR,
+					   uhci_debugfs_root, uhci,
+					   &uhci_debug_operations);
 #endif
 
 	uhci->frame = dma_zalloc_coherent(uhci_dev(uhci),
@@ -882,8 +878,6 @@ static int __init uhci_hcd_init(void)
 	if (!errbuf)
 		goto errbuf_failed;
 	uhci_debugfs_root = debugfs_create_dir("uhci", usb_debug_root);
-	if (!uhci_debugfs_root)
-		goto debug_failed;
 #endif
 
 	uhci_up_cachep = kmem_cache_create("uhci_urb_priv",
@@ -918,7 +912,6 @@ static int __init uhci_hcd_init(void)
 #if defined(DEBUG) || defined(CONFIG_DYNAMIC_DEBUG)
 	debugfs_remove(uhci_debugfs_root);
 
-debug_failed:
 	kfree(errbuf);
 
 errbuf_failed: