diff --git a/drivers/usb/gadget/function/u_ether.c b/drivers/usb/gadget/function/u_ether.c
index 3be4b93fd415f56cbf8cfadf68abdc55d517ee45..9c8c9ed1dc9e0b2186e60e66488ea1159f22d7b8 100644
--- a/drivers/usb/gadget/function/u_ether.c
+++ b/drivers/usb/gadget/function/u_ether.c
@@ -571,7 +571,8 @@ static netdev_tx_t eth_start_xmit(struct sk_buff *skb,
 	req->complete = tx_complete;
 
 	/* NCM requires no zlp if transfer is dwNtbInMaxSize */
-	if (dev->port_usb->is_fixed &&
+	if (dev->port_usb &&
+	    dev->port_usb->is_fixed &&
 	    length == dev->port_usb->fixed_in_len &&
 	    (length % in->maxpacket) == 0)
 		req->zero = 0;