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usb-storage: don't try to send the status early. 

Until recently all scsi commands sent to scsi-disk did either transfer
data or finished instantly.  The correct implementation of
SYNCRONIZE_CACHE changed the picture though, and usb-storage needs
a fix to handle that case correctly.
This commit is contained in:
Gerd Hoffmann 2011-11-21 14:01:26 +01:00
parent 414c460431
commit 5931065907
1 changed files with 10 additions and 6 deletions
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16
hw/usb-msd.c
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@ -378,9 +378,7 @@ static int usb_msd_handle_data(USBDevice *dev, USBPacket *p)
s->scsi_len = 0;
s->req = scsi_req_new(s->scsi_dev, tag, 0, cbw.cmd, NULL);
scsi_req_enqueue(s->req);
/* ??? Should check that USB and SCSI data transfer
directions match. */
if (s->mode != USB_MSDM_CSW && s->residue == 0) {
if (s->req && s->req->cmd.xfer != SCSI_XFER_NONE) {
scsi_req_continue(s->req);
}
ret = p->result;
@ -439,9 +437,15 @@ static int usb_msd_handle_data(USBDevice *dev, USBPacket *p)
goto fail;
}
usb_msd_send_status(s, p);
s->mode = USB_MSDM_CBW;
ret = 13;
if (s->req) {
/* still in flight */
s->packet = p;
ret = USB_RET_ASYNC;
} else {
usb_msd_send_status(s, p);
s->mode = USB_MSDM_CBW;
ret = 13;
}
break;
case USB_MSDM_DATAIN: