usb: gadget: composite: switch over to ERR_CAST()

---
 drivers/usb/gadget/composite.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
 
diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index d742bed..fab9064 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -1139,7 +1139,7 @@ struct usb_string *usb_gstrings_attach(struct usb_composite_dev *cdev,
 
 	uc = copy_gadget_strings(sp, n_gstrings, n_strings);
 	if (IS_ERR(uc))
-		return ERR_PTR(PTR_ERR(uc));
+		return ERR_CAST(uc);
 
 	n_gs = get_containers_gs(uc);
 	ret = usb_string_ids_tab(cdev, n_gs[0]->strings);