igb: remove netif running call from igb_poll

The netif_running check in igb poll is a hold over from the use of fake
netdevs to use multiple queues with NAPI prior to 2.6.24.  It is no longer
necessary to have the call there and it currently can cause errors if
work_done == budget.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Acked-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/igb/igb_main.c

@@ -4187,7 +4187,6 @@ static int igb_poll(struct napi_struct *napi, int budget)
 {
 	struct igb_ring *rx_ring = container_of(napi, struct igb_ring, napi);
 	struct igb_adapter *adapter = rx_ring->adapter;
-	struct net_device *netdev = adapter->netdev;
 	int work_done = 0;
 
 #ifdef CONFIG_IGB_DCA
@@ -4206,7 +4205,7 @@ static int igb_poll(struct napi_struct *napi, int budget)
 	}
 
 	/* If not enough Rx work done, exit the polling mode */
-	if ((work_done < budget) || !netif_running(netdev)) {
+	if (work_done < budget) {
 		napi_complete(napi);
 		igb_rx_irq_enable(rx_ring);
 	}