diff --git a/drivers/usb/gadget/legacy/inode.c b/drivers/usb/gadget/legacy/inode.c
index aa3707b..8560f2f 100644
--- a/drivers/usb/gadget/legacy/inode.c
+++ b/drivers/usb/gadget/legacy/inode.c
@@ -606,7 +606,7 @@
 	}
 	if (is_sync_kiocb(iocb)) {
 		value = ep_io(epdata, buf, len);
-		if (value >= 0 && copy_to_iter(buf, value, to))
+		if (value >= 0 && (copy_to_iter(buf, value, to) != value))
 			value = -EFAULT;
 	} else {
 		struct kiocb_priv *priv = kzalloc(sizeof *priv, GFP_KERNEL);