We get two error messages: one from monitor_handle_fd_param2(), and another one from vhost_scsi_realize(). The second one gets suppressed in QMP context.
That's because monitor_handle_fd_param() calls qerror_report_err(). Calling qerror_report_err() is always inappropriate in realize methods, because it doesn't return the Error object. It either reports the error to stderr or the human monitor, or it stores it in the QMP monitor, where it makes the QMP command fail even when the realize method ignores the error and succeeds. Fortunately, vhost_scsi_realize() doesn't do that. Fix by switching to monitor_handle_fd_param2(). Signed-off-by: Markus Armbruster <arm...@redhat.com> --- hw/scsi/vhost-scsi.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/hw/scsi/vhost-scsi.c b/hw/scsi/vhost-scsi.c index dcb2bc5..567f350 100644 --- a/hw/scsi/vhost-scsi.c +++ b/hw/scsi/vhost-scsi.c @@ -214,9 +214,11 @@ static void vhost_scsi_realize(DeviceState *dev, Error **errp) } if (vs->conf.vhostfd) { - vhostfd = monitor_handle_fd_param(cur_mon, vs->conf.vhostfd); + vhostfd = monitor_handle_fd_param2(cur_mon, vs->conf.vhostfd, &err); if (vhostfd == -1) { - error_setg(errp, "vhost-scsi: unable to parse vhostfd"); + error_setg(errp, "vhost-scsi: unable to parse vhostfd: %s", + error_get_pretty(err)); + error_free(err); return; } } else { -- 1.9.3