Although existing virDomainDefPostParse is called after modifying the XML and it contains validating process for changed device, the virDomainDefValidate function performs a more comprehensive check. It should detect errors resulting from dependencies between devices. Therefore, the virDomainDefValidate is added at the end. Signed-off-by: Adam Julis <ajulis(a)redhat.com&gt; --- src/qemu/qemu_driver.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index e2698c7924..67b9778c67 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -6869,6 +6869,9 @@ qemuDomainAttachDeviceConfig(virDomainDef *vmdef, if (virDomainDefPostParse(vmdef, parse_flags, xmlopt, qemuCaps) < 0) return -1; + if (virDomainDefValidate(vmdef, parse_flags, xmlopt, qemuCaps) < 0) + return -1; + return 0; } -- 2.44.0