https://bugzilla.redhat.com/show_bug.cgi?id=1174154 When we use attach-device add a hostdev or chr device which have a iscsi address or others (just like guest agent, subsys iscsi disk...), we will find there is no basic controller for our new attached device. Somtimes this will make guest cannot start after we add them (although they can start at the second time). Signed-off-by: Luyao Huang <lhuang(a)redhat.com&gt; --- src/qemu/qemu_driver.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index df3ba6d..62fb784 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -7250,6 +7250,8 @@ qemuDomainAttachDeviceConfig(virQEMUCapsPtr qemuCaps, if (virDomainHostdevInsert(vmdef, hostdev)) return -1; dev->data.hostdev = NULL; + if (virDomainDefAddImplicitControllers(vmdef) < 0) + return -1; if (qemuDomainAssignAddresses(vmdef, qemuCaps, NULL) < 0) return -1; break; @@ -7290,6 +7292,8 @@ qemuDomainAttachDeviceConfig(virQEMUCapsPtr qemuCaps, if (qemuDomainChrInsert(vmdef, dev->data.chr) < 0) return -1; dev->data.chr = NULL; + if (virDomainDefAddImplicitControllers(vmdef) < 0) + return -1; break; case VIR_DOMAIN_DEVICE_FS: