[libvirt] [PATCH v4 04/10] Wait for vfio-pci device cleanups before reassinging the device to host driver
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 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,