8139cp: use napi_complete_done()

Use napi_complete_done() instead of __napi_complete() to :

1) Get support of gro_flush_timeout if opt-in
2) Not rearm interrupts for busy-polling users.
3) use standard NAPI API.
4) Eventually get rid of napi_gro_flush() in the future.
Signed-off-by: NEric Dumazet <edumazet@google.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/realtek/8139cp.c

@@ -465,10 +465,8 @@ static int cp_rx_poll(struct napi_struct *napi, int budget)
 	struct cp_private *cp = container_of(napi, struct cp_private, napi);
 	struct net_device *dev = cp->dev;
 	unsigned int rx_tail = cp->rx_tail;
-	int rx;
+	int rx = 0;
 
-	rx = 0;
-rx_status_loop:
 	cpw16(IntrStatus, cp_rx_intr_mask);
 
 	while (rx < budget) {
@@ -556,15 +554,10 @@ static int cp_rx_poll(struct napi_struct *napi, int budget)
 	/* if we did not reach work limit, then we're done with
 	 * this round of polling
 	 */
-	if (rx < budget) {
+	if (rx < budget && napi_complete_done(napi, rx)) {
 		unsigned long flags;
 
-		if (cpr16(IntrStatus) & cp_rx_intr_mask)
-			goto rx_status_loop;
-
-		napi_gro_flush(napi, false);
 		spin_lock_irqsave(&cp->lock, flags);
-		__napi_complete(napi);
 		cpw16_f(IntrMask, cp_intr_mask);
 		spin_unlock_irqrestore(&cp->lock, flags);
 	}