ixgbe/ixgbevf: Free IRQ when PCI error recovery removes the device

Since commit f7f37e7ff2b9 ("ixgbe: handle close/suspend race with
netif_device_detach/present") ixgbe_close_suspend is called, from
ixgbe_close, only if the device is present, i.e. if it isn't detached.
That exposed a situation where IRQs weren't freed if a PCI error
recovery system opts to remove the device. For such case the pci channel
state is set to pci_channel_io_perm_failure and ixgbe_io_error_detected
was returning PCI_ERS_RESULT_DISCONNECT before calling
ixgbe_close_suspend consequentially not freeing IRQ and crashing when
the remove handler calls pci_disable_device, hitting a BUG_ON at
free_msi_irqs, which asserts that there is no non-free IRQ associated
with the device to be removed:

BUG_ON(irq_has_action(entry->irq + i));

The issue is fixed by calling the ixgbe_close_suspend before evaluate
the pci channel state.

Reported-by: Naresh Bannoth <nbannoth@in.ibm.com>
Reported-by: Abdul Haleem <abdhalee@in.ibm.com>
Signed-off-by: Mauro S M Rodrigues <maurosr@linux.vnet.ibm.com>
Reviewed-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index 163b34a9572d..a52d92e182ee 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -10935,14 +10935,14 @@ skip_bad_vf_detection:
 	rtnl_lock();
 	netif_device_detach(netdev);
 
+	if (netif_running(netdev))
+		ixgbe_close_suspend(adapter);
+
 	if (state == pci_channel_io_perm_failure) {
 		rtnl_unlock();
 		return PCI_ERS_RESULT_DISCONNECT;
 	}
 
-	if (netif_running(netdev))
-		ixgbe_close_suspend(adapter);
-
 	if (!test_and_set_bit(__IXGBE_DISABLED, &adapter->state))
 		pci_disable_device(pdev);
 	rtnl_unlock();