xhci: don't mess with ->d_iname

use debugs_{creat_file,get}_aux() instead

Signed-off-by: Al Viro <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: Al Viro

drivers/usb/host/xhci-debugfs.c

@@ -232,16 +232,7 @@ static struct xhci_file_map ring_files[] = {
 
 static int xhci_ring_open(struct inode *inode, struct file *file)
 {
-	int			i;
-	struct xhci_file_map	*f_map;
-	const char		*file_name = file_dentry(file)->d_iname;
-
-	for (i = 0; i < ARRAY_SIZE(ring_files); i++) {
-		f_map = &ring_files[i];
-
-		if (strcmp(f_map->name, file_name) == 0)
-			break;
-	}
+	const struct xhci_file_map *f_map = debugfs_get_aux(file);
 
 	return single_open(file, f_map->show, inode->i_private);
 }
@@ -318,16 +309,7 @@ static struct xhci_file_map context_files[] = {
 
 static int xhci_context_open(struct inode *inode, struct file *file)
 {
-	int			i;
-	struct xhci_file_map	*f_map;
-	const char		*file_name = file_dentry(file)->d_iname;
-
-	for (i = 0; i < ARRAY_SIZE(context_files); i++) {
-		f_map = &context_files[i];
-
-		if (strcmp(f_map->name, file_name) == 0)
-			break;
-	}
+	const struct xhci_file_map *f_map = debugfs_get_aux(file);
 
 	return single_open(file, f_map->show, inode->i_private);
 }
@@ -410,7 +392,8 @@ static void xhci_debugfs_create_files(struct xhci_hcd *xhci,
 	int			i;
 
 	for (i = 0; i < nentries; i++)
-		debugfs_create_file(files[i].name, 0444, parent, data, fops);
+		debugfs_create_file_aux(files[i].name, 0444, parent,
+					data, &files[i], fops);
 }
 
 static struct dentry *xhci_debugfs_create_ring_dir(struct xhci_hcd *xhci,