i40vf: don't stop me now

If a reset occurs when the netdev is closed, the reset task will hang in
napi_disable, causing deadlocks and general grumpiness.

Check to make sure the device is actually running before stopping
everything. This allows the reset task to complete and have a real good
time.

Change-ID: Iaaea84acbcb9b3810c216b14c3326e4287b75b58
Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/i40evf/i40evf_main.c

@@ -1578,13 +1578,14 @@ static void i40evf_reset_task(struct work_struct *work)
 	adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
 
 	i40evf_irq_disable(adapter);
-	i40evf_napi_disable_all(adapter);
 
+	if (netif_running(adapter->netdev)) {
+		i40evf_napi_disable_all(adapter);
 		netif_tx_disable(netdev);
-
 		netif_tx_stop_all_queues(netdev);
-
 		netif_carrier_off(netdev);
+	}
+
 	adapter->state = __I40EVF_RESETTING;
 
 	/* kill and reinit the admin queue */