[PATCH 3.18 24/38] ixgbe: fix AER error handling

Greg Kroah-Hartman
2017-11-19T15:20:48Z

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

[ Upstream commit 126db13fa0e6d05c9f94e0125f61e773bd5ab079 ]

Make sure that we free the IRQs in ixgbe_io_error_detected() when
responding to an PCIe AER error and also restore them when the
interface recovers from it.

Previously it was possible to trigger BUG_ON() check in free_msix_irqs()
in the case where we call ixgbe_remove() after a failed recovery from
AER error because the interrupts were not freed.

Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -8575,7 +8575,7 @@ skip_bad_vf_detection:
}

if (netif_running(netdev))
- ixgbe_down(adapter);
+ ixgbe_close_suspend(adapter);

if (!test_and_set_bit(__IXGBE_DISABLED, &adapter->state))
pci_disable_device(pdev);
@@ -8645,10 +8645,12 @@ static void ixgbe_io_resume(struct pci_d
}

#endif
+ rtnl_lock();
if (netif_running(netdev))
- ixgbe_up(adapter);
+ ixgbe_open(netdev);

netif_device_attach(netdev);
+ rtnl_unlock();
}

static const struct pci_error_handlers ixgbe_err_handler = {