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scsi: introduce scsi_req_cancel

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This is for when the request must be dropped in the void,
but still memory should be freed.  To this end, the devices
register a second callback in SCSIBusOps.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Paolo Bonzini 2011-04-18 22:53:08 +02:00
parent 19d110ab8a
commit 94d3f98a3f
8 changed files with 80 additions and 17 deletions
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17
hw/scsi-bus.c
View file

@ -549,6 +549,19 @@ void scsi_req_complete(SCSIRequest *req)
scsi_req_unref(req);
}
void scsi_req_cancel(SCSIRequest *req)
{
if (req->dev && req->dev->info->cancel_io) {
req->dev->info->cancel_io(req);
}
scsi_req_ref(req);
scsi_req_dequeue(req);
if (req->bus->ops->cancel) {
req->bus->ops->cancel(req);
}
scsi_req_unref(req);
}
void scsi_req_abort(SCSIRequest *req, int status)
{
req->status = status;
@ -564,9 +577,7 @@ void scsi_device_purge_requests(SCSIDevice *sdev)
while (!QTAILQ_EMPTY(&sdev->requests)) {
req = QTAILQ_FIRST(&sdev->requests);
sdev->info->cancel_io(req);
scsi_req_dequeue(req);
scsi_req_unref(req);
scsi_req_cancel(req);
}
}