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ixgbe: Teardown SR-IOV before unregister_netdev() 

When the .remove() callback for a PF is called, SR-IOV support for the
device is disabled, which requires unbinding and removing the VFs.
The VFs may be in-use either by the host kernel or userspace, such as
assigned to a VM through vfio-pci.  In this latter case, the VFs may
be removed either by shutting down the VM or hot-unplugging the
devices from the VM.  Unfortunately in the case of a Windows 2012 R2
guest, hot-unplug is broken due to the ordering of the PF driver
teardown.  Disabling SR-IOV prior to unregister_netdev() avoids this
issue.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Acked-by: Mitch Williams <mitch.a.williams@intel.com>
Tested-by: Krishneil Singh <krishneil.k.singh@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Alex Williamson 2015-07-29 14:38:21 -06:00 committed by Jeff Kirsher
parent 4ccc650cc8
commit 6b010e9b1f
1 changed files with 3 additions and 3 deletions
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6
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
View File

@ -9028,12 +9028,12 @@ static void ixgbe_remove(struct pci_dev *pdev)
/* remove the added san mac */
ixgbe_del_sanmac_netdev(netdev);
if (netdev->reg_state == NETREG_REGISTERED)
unregister_netdev(netdev);
#ifdef CONFIG_PCI_IOV
ixgbe_disable_sriov(adapter);
#endif
if (netdev->reg_state == NETREG_REGISTERED)
unregister_netdev(netdev);
ixgbe_clear_interrupt_scheme(adapter);
ixgbe_release_hw_control(adapter);