From 6777829cfe1c4ed78319ad40aaee60254222da76 Mon Sep 17 00:00:00 2001 From: Greg Rose Date: Fri, 22 Jul 2011 05:46:07 +0000 Subject: 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 CC: Konrad Wilk Signed-off-by: Greg Rose Acked-by: Jesse Barnes Signed-off-by: Jeff Kirsher --- virt/kvm/assigned-dev.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'virt/kvm/assigned-dev.c') 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); -- cgit v1.2.3