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virtio-scsi: Prevent assertion on missed events 

In some cases, an unplug can cause events to be dropped, which
leads to an assertion failure when preparing to notify the guest
kernel.

Signed-off-by: Eric Farman <farman@linux.vnet.ibm.com>
Cc: qemu-stable@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit 49fb65c7f9)

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
This commit is contained in:
Eric Farman 2014-01-14 14:16:26 -05:00 committed by Michael Roth
parent 30a0fc3607
commit a5221ee143
1 changed files with 1 additions and 1 deletions
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2
hw/scsi/virtio-scsi.c
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@ -520,7 +520,7 @@ static void virtio_scsi_push_event(VirtIOSCSI *s, SCSIDevice *dev,
evt->event = event;
evt->reason = reason;
if (!dev) {
assert(event == VIRTIO_SCSI_T_NO_EVENT);
assert(event == VIRTIO_SCSI_T_EVENTS_MISSED);
} else {
evt->lun[0] = 1;
evt->lun[1] = dev->id;