aboutsummaryrefslogtreecommitdiff
path: root/virt/kvm/assigned-dev.c
diff options
context:
space:
mode:
authorGreg Rose <gregory.v.rose@intel.com>2011-07-22 05:46:07 +0000
committerJeff Kirsher <jeffrey.t.kirsher@intel.com>2011-09-23 09:05:44 -0700
commit6777829cfe1c4ed78319ad40aaee60254222da76 (patch)
tree03e55538247c4b2fbdc837984922a0ac8753b253 /virt/kvm/assigned-dev.c
parent9c9b1f24f2aa31a3cea94939edc551f68ebadc89 (diff)
downloadlinux-linaro-stable-6777829cfe1c4ed78319ad40aaee60254222da76.tar.gz
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.c2
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);