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igb: Teardown SR-IOV before unregister_netdev()

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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: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Alex Williamson 2015-07-29 14:38:15 -06:00 • committed by Jeff Kirsher
parent 51045ecff0
commit c23d92b80e
1 changed files with 4 additions and 4 deletions
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8
drivers/net/ethernet/intel/igb/igb_main.c
View file

@ -2809,14 +2809,14 @@ static void igb_remove(struct pci_dev *pdev)
*/ */
igb_release_hw_control(adapter); igb_release_hw_control(adapter);
unregister_netdev(netdev);
igb_clear_interrupt_scheme(adapter);
#ifdef CONFIG_PCI_IOV #ifdef CONFIG_PCI_IOV
igb_disable_sriov(pdev); igb_disable_sriov(pdev);
#endif #endif
unregister_netdev(netdev);
igb_clear_interrupt_scheme(adapter);
pci_iounmap(pdev, hw->hw_addr); pci_iounmap(pdev, hw->hw_addr);
if (hw->flash_address) if (hw->flash_address)
iounmap(hw->flash_address); iounmap(hw->flash_address);