[Qemu-devel] [PATCH v2 0/2] virtio-scsi: fix hotplug ->reset() vs event race

[Stefan Hajnoczi]

v2:
 * Drop Error **errp argument to post_plug() handler [Paolo]
 * Move post_plug() call outside if (dev->hotplugged)

The virtio-scsi command virtqueues run during hotplug.  This creates the
possibility of race conditions since the guest can submit commands while the
monitor is performing hotplug.

See Patch 2 for a fix for the ->reset() vs event race condition that Zhengui Li
encountered.

Stefan Hajnoczi (2):
  qdev: add HotplugHandler->post_plug() callback
  virtio-scsi: fix hotplug ->reset() vs event race

 include/hw/hotplug.h  | 11 +++++++++++
 hw/core/hotplug.c     | 10 ++++++++++
 hw/core/qdev.c        |  4 ++++
 hw/scsi/virtio-scsi.c | 11 ++++++++++-
 4 files changed, 35 insertions(+), 1 deletion(-)

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2.17.1