scsi: keep device alive while it has requests
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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@ -505,10 +505,12 @@ SCSIRequest *scsi_req_alloc(const SCSIReqOps *reqops, SCSIDevice *d,
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uint32_t tag, uint32_t lun, void *hba_private)
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{
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SCSIRequest *req;
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SCSIBus *bus = scsi_bus_from_device(d);
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BusState *qbus = BUS(bus);
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req = g_malloc0(reqops->size);
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req->refcount = 1;
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req->bus = scsi_bus_from_device(d);
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req->bus = bus;
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req->dev = d;
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req->tag = tag;
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req->lun = lun;
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@ -516,6 +518,8 @@ SCSIRequest *scsi_req_alloc(const SCSIReqOps *reqops, SCSIDevice *d,
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req->status = -1;
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req->sense_len = 0;
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req->ops = reqops;
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object_ref(OBJECT(d));
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object_ref(OBJECT(qbus->parent));
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trace_scsi_req_alloc(req->dev->id, req->lun, req->tag);
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return req;
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}
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@ -1498,13 +1502,17 @@ void scsi_req_unref(SCSIRequest *req)
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{
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assert(req->refcount > 0);
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if (--req->refcount == 0) {
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SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, req->dev->qdev.parent_bus);
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BusState *qbus = req->dev->qdev.parent_bus;
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SCSIBus *bus = DO_UPCAST(SCSIBus, qbus, qbus);
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if (bus->info->free_request && req->hba_private) {
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bus->info->free_request(bus, req->hba_private);
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}
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if (req->ops->free_req) {
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req->ops->free_req(req);
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}
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object_unref(OBJECT(req->dev));
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object_unref(OBJECT(qbus->parent));
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g_free(req);
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}
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}
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