Re: [libvirt] [PATCH v2] conf: add enum constants for default controller models

The controller model is slightly unusual in that the default value is -1, not 0. As a result the default value is not covered by any of the existing enum cases. This in turn means that any switch() statements that think they have covered all cases, will in fact not match the default value at all. In the qemuDomainDeviceCalculatePCIConnectFlags() method this has caused a serious mistake where we fallthrough from the SCSI controller case, to the VirtioSerial controller case, and from the USB controller case to the IDE controller case. By adding explicit enum constant starting at -1, we can ensure switches remember to handle the default case. Signed-off-by: Daniel P. Berrangé <berrange(a)redhat.com&gt; --- src/conf/domain_addr.c | 6 +++--- src/conf/domain_conf.c | 3 ++- src/conf/domain_conf.h | 4 ++++ src/libxl/libxl_conf.c | 2 +- src/qemu/qemu_command.c | 21 ++++++++++++++++----- src/qemu/qemu_domain.c | 14 +++++++++++--- src/qemu/qemu_domain_address.c | 19 +++++++++++++++++-- src/qemu/qemu_hotplug.c | 2 +- src/vbox/vbox_common.c | 13 +++++++++---- src/vmx/vmx.c | 2 +- 10 files changed, 65 insertions(+), 21 deletions(-)