rtl8187: Add termination packet to prevent stall

The RTL8187 and RTL8187B devices can stall unless an explicit termination
packet is sent.
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/rtl818x/rtl8187_dev.c

@@ -273,6 +273,7 @@ static int rtl8187_tx(struct ieee80211_hw *dev, struct sk_buff *skb)
 
 	usb_fill_bulk_urb(urb, priv->udev, usb_sndbulkpipe(priv->udev, ep),
 			  buf, skb->len, rtl8187_tx_cb, skb);
+	urb->transfer_flags |= URB_ZERO_PACKET;
 	usb_anchor_urb(urb, &priv->anchored);
 	rc = usb_submit_urb(urb, GFP_ATOMIC);
 	if (rc < 0) {