netback: correct netbk_tx_err to handle wrap around.

Ian Campbell · davem330 · commit b9149729ebdc · 2013-02-07T23:29:29.000-05:00
Signed-off-by: Ian Campbell &lt;ian.campbell@citrix.com&gt;
Acked-by: Jan Beulich &lt;JBeulich@suse.com&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c
@@ -880,7 +880,7 @@ static void netbk_tx_err(struct xenvif *vif,
 
 	do {
 		make_tx_response(vif, txp, XEN_NETIF_RSP_ERROR);
-		if (cons >= end)
+		if (cons == end)
 			break;
 		txp = RING_GET_REQUEST(&vif->tx, cons++);
 	} while (1);
