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(a)linux.vnet.ibm.com>
---
src/util/virhostdev.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/src/util/virhostdev.c b/src/util/virhostdev.c
index 4c441b9..c5a6553 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,