ixgbe: fix crash when injecting AER after failed reset

In case where AER recovery fails the device is left in a down state.
Consecutive AER error injection can lead to a double IRQ free.
Signed-off-by: NEmil Tantilov <emil.s.tantilov@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/ixgbe/ixgbe_main.c

@@ -10861,6 +10861,9 @@ static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
 	if (!test_bit(__IXGBE_SERVICE_INITED, &adapter->state))
 		return PCI_ERS_RESULT_DISCONNECT;
 
+	if (!netif_device_present(netdev))
+		return PCI_ERS_RESULT_DISCONNECT;
+
 	rtnl_lock();
 	netif_device_detach(netdev);