From e323369b2e204da4dc771bbddceef986f4bf85d5 Mon Sep 17 00:00:00 2001 From: Alex Williamson Date: Wed, 28 Jun 2017 13:49:52 -0600 Subject: kvm-vfio: Decouple only when we match a group Unset-KVM and decrement-assignment only when we find the group in our list. Otherwise we can get out of sync if the user triggers this for groups that aren't currently on our list. Signed-off-by: Alex Williamson Reviewed-by: Alexey Kardashevskiy Reviewed-by: Eric Auger Tested-by: Eric Auger Acked-by: Paolo Bonzini Cc: stable@vger.kernel.org --- virt/kvm/vfio.c | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-) (limited to 'virt') diff --git a/virt/kvm/vfio.c b/virt/kvm/vfio.c index 37d9118..6e002d0 100644 --- a/virt/kvm/vfio.c +++ b/virt/kvm/vfio.c @@ -246,21 +246,20 @@ static int kvm_vfio_set_group(struct kvm_device *dev, long attr, u64 arg) continue; list_del(&kvg->node); + kvm_arch_end_assignment(dev->kvm); +#ifdef CONFIG_SPAPR_TCE_IOMMU + kvm_spapr_tce_release_vfio_group(dev->kvm, + kvg->vfio_group); +#endif + kvm_vfio_group_set_kvm(kvg->vfio_group, NULL); kvm_vfio_group_put_external_user(kvg->vfio_group); kfree(kvg); ret = 0; break; } - kvm_arch_end_assignment(dev->kvm); - mutex_unlock(&kv->lock); -#ifdef CONFIG_SPAPR_TCE_IOMMU - kvm_spapr_tce_release_vfio_group(dev->kvm, vfio_group); -#endif - kvm_vfio_group_set_kvm(vfio_group, NULL); - kvm_vfio_group_put_external_user(vfio_group); kvm_vfio_update_coherency(dev); -- cgit v1.1