net8139: fix a race at the end of NAPI

fix a race at the end of NAPI complete processing, it had
better do __napi_complete() first before re-enable interrupt.
Signed-off-by: NFigo.zhang <figo1802@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/8139cp.c

@@ -598,8 +598,8 @@ static int cp_rx_poll(struct napi_struct *napi, int budget)
 			goto rx_status_loop;
 
 		spin_lock_irqsave(&cp->lock, flags);
-		cpw16_f(IntrMask, cp_intr_mask);
 		__napi_complete(napi);
+		cpw16_f(IntrMask, cp_intr_mask);
 		spin_unlock_irqrestore(&cp->lock, flags);
 	}
 

drivers/net/8139too.c

@@ -2089,8 +2089,8 @@ static int rtl8139_poll(struct napi_struct *napi, int budget)
 		 * again when we think we are done.
 		 */
 		spin_lock_irqsave(&tp->lock, flags);
-		RTL_W16_F(IntrMask, rtl8139_intr_mask);
 		__napi_complete(napi);
+		RTL_W16_F(IntrMask, rtl8139_intr_mask);
 		spin_unlock_irqrestore(&tp->lock, flags);
 	}
 	spin_unlock(&tp->rx_lock);