diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 005e65922608e9f0f72c3f06d26a9a436d1362f7..7fa58c99f12614962a1f852711b699929799f1e5 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -1455,8 +1455,7 @@ static int xhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flag
 	else
 		num_tds = 1;
 
-	urb_priv = kzalloc(sizeof(struct urb_priv) +
-			   num_tds * sizeof(struct xhci_td), mem_flags);
+	urb_priv = kzalloc(struct_size(urb_priv, td, num_tds), mem_flags);
 	if (!urb_priv)
 		return -ENOMEM;