Before unbind from stub driver libvirt should be sure the guest is not using the device anymore. The libvirt today waits for pci-stub driver alone in /proc/iommu. The same wait is needed for vfio devices too. Signed-off-by: Shivaprasad G Bhat <sbhat@xxxxxxxxxxxxxxxxxx> --- src/util/virhostdev.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/src/util/virhostdev.c b/src/util/virhostdev.c index f24ccd8..9f15f34 100644 --- a/src/util/virhostdev.c +++ b/src/util/virhostdev.c @@ -756,6 +756,13 @@ virHostdevReattachPCIDevice(virPCIDevicePtr dev, virHostdevManagerPtr mgr) usleep(100*1000); retries--; } + } else if (STREQ(virPCIDeviceGetStubDriver(dev), "vfio-pci")) { + int retries = 100; + while (virPCIDeviceWaitForCleanup(dev, "vfio-pci") + && retries) { + usleep(100*1000); + retries--; + } } if (virPCIDeviceReattach(dev, mgr->activePCIHostdevs, -- libvir-list mailing list libvir-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/libvir-list