diff options
| author | Greg Rose <gregory.v.rose@intel.com> | 2011-07-22 05:46:07 +0000 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2011-09-23 09:05:44 -0700 |
| commit | 6777829cfe1c4ed78319ad40aaee60254222da76 (patch) | |
| tree | 03e55538247c4b2fbdc837984922a0ac8753b253 /virt/kvm/assigned-dev.c | |
| parent | 9c9b1f24f2aa31a3cea94939edc551f68ebadc89 (diff) | |
| download | lwn-6777829cfe1c4ed78319ad40aaee60254222da76.tar.gz lwn-6777829cfe1c4ed78319ad40aaee60254222da76.zip | |
pci: Add flag indicating device has been assigned by KVM
Device drivers that create and destroy SR-IOV virtual functions via
calls to pci_enable_sriov() and pci_disable_sriov can cause catastrophic
failures if they attempt to destroy VFs while they are assigned to
guest virtual machines. By adding a flag for use by the KVM module
to indicate that a device is assigned a device driver can check that
flag and avoid destroying VFs while they are assigned and avoid system
failures.
CC: Ian Campbell <ijc@hellion.org.uk>
CC: Konrad Wilk <konrad.wilk@oracle.com>
Signed-off-by: Greg Rose <gregory.v.rose@intel.com>
Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'virt/kvm/assigned-dev.c')
| -rw-r--r-- | virt/kvm/assigned-dev.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/virt/kvm/assigned-dev.c b/virt/kvm/assigned-dev.c index 4e9eaeb518c7..eaf3a50f9769 100644 --- a/virt/kvm/assigned-dev.c +++ b/virt/kvm/assigned-dev.c @@ -205,6 +205,8 @@ static void kvm_free_assigned_device(struct kvm *kvm, else pci_restore_state(assigned_dev->dev); + assigned_dev->dev->dev_flags &= ~PCI_DEV_FLAGS_ASSIGNED; + pci_release_regions(assigned_dev->dev); pci_disable_device(assigned_dev->dev); pci_dev_put(assigned_dev->dev); |