e1000e: driver trying to free already-free irq

During systemd reboot sequence network driver interface is shutdown
by e1000_close. The PCI driver interface is shut by e1000_shutdown.
The e1000_shutdown checks for netif_running status, if still up it
brings down driver. But it disables msi outside of this if statement,
regardless of netif status. All this is OK when e1000_close happens
after shutdown. However, by default, everything in systemd is done
in parallel. This creates a conditions where e1000_shutdown is called
after e1000_close, therefore hitting BUG_ON assert in free_msi_irqs.

CC: xe-kernel@external.cisco.com
Signed-off-by: khalidm <khalidm@cisco.com>
Signed-off-by: David Singleton <davsingl@cisco.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c
index eccf1da9356badc85df416cca1a519bb1ec417bc..af3960853a321d7b93b11afb0396ffa569f19fe0 100644 (file)
--- a/drivers/net/ethernet/intel/e1000e/netdev.c
+++ b/drivers/net/ethernet/intel/e1000e/netdev.c
@@ -6276,8 +6276,8 @@ static int e1000e_pm_freeze(struct device *dev)
                /* Quiesce the device without resetting the hardware */
                e1000e_down(adapter, false);
                e1000_free_irq(adapter);
+               e1000e_reset_interrupt_capability(adapter);
        }
-       e1000e_reset_interrupt_capability(adapter);
 
        /* Allow time for pending master requests to run */
        e1000e_disable_pcie_master(&adapter->hw);