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scsi: pass residual amount to command_complete

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With the upcoming sglist support, HBAs will not see any transfer_data
call and will not have a way to detect short transfers.  So pass the
residual amount of data upon command completion.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2011-07-06 11:55:37 +02:00
parent da22132752
commit 01e9545588
6 changed files with 15 additions and 9 deletions
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12
hw/scsi-bus.c
View file

@ -533,6 +533,8 @@ SCSIRequest *scsi_req_new(SCSIDevice *d, uint32_t tag, uint32_t lun,
}
req->cmd = cmd;
req->resid = req->cmd.xfer;
switch (buf[0]) {
case INQUIRY:
trace_scsi_inquiry(d->id, lun, tag, cmd.buf[1], cmd.buf[2]);
@ -1275,10 +1277,12 @@ void scsi_req_data(SCSIRequest *req, int len)
{
if (req->io_canceled) {
trace_scsi_req_data_canceled(req->dev->id, req->lun, req->tag, len);
} else {
trace_scsi_req_data(req->dev->id, req->lun, req->tag, len);
req->bus->info->transfer_data(req, len);
return;
}
trace_scsi_req_data(req->dev->id, req->lun, req->tag, len);
assert(req->cmd.mode != SCSI_XFER_NONE);
req->resid -= len;
req->bus->info->transfer_data(req, len);
}
void scsi_req_print(SCSIRequest *req)
@ -1337,7 +1341,7 @@ void scsi_req_complete(SCSIRequest *req, int status)
scsi_req_ref(req);
scsi_req_dequeue(req);
req->bus->info->complete(req, req->status);
req->bus->info->complete(req, req->status, req->resid);
scsi_req_unref(req);
}