it should be a comparison of modes between new and old devices. So the argument of the second virDomainNetGetActualDirectMode should be newdev. Signed-off-by: ZhiPeng Lu <lu.zhipeng(a)zte.com.cn&gt; --- src/qemu/qemu_hotplug.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c index 120bcdc..eec99af 100644 --- a/src/qemu/qemu_hotplug.c +++ b/src/qemu/qemu_hotplug.c @@ -3273,7 +3273,7 @@ qemuDomainChangeNet(virQEMUDriverPtr driver, if (STRNEQ_NULLABLE(virDomainNetGetActualDirectDev(olddev), virDomainNetGetActualDirectDev(newdev)) || - virDomainNetGetActualDirectMode(olddev) != virDomainNetGetActualDirectMode(olddev) || + virDomainNetGetActualDirectMode(olddev) != virDomainNetGetActualDirectMode(newdev) || !virNetDevVPortProfileEqual(virDomainNetGetActualVirtPortProfile(olddev), virDomainNetGetActualVirtPortProfile(newdev)) || !virNetDevVlanEqual(virDomainNetGetActualVlan(olddev), -- 1.8.3.1