From: Emil Tantilov <emil.s.tanti...@intel.com>

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: Emil Tantilov <emil.s.tanti...@intel.com>
Tested-by: Andrew Bowers <andrewx.bow...@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirs...@intel.com>
---
 drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c 
b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index 5e2686d106db..c6f9da7990c7 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/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);
 
-- 
2.14.2

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