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scsi: introduce scsi_req_continue

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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Paolo Bonzini 2011-04-18 15:28:11 +02:00
parent 43a2b33957
commit ad3376cc55
7 changed files with 47 additions and 60 deletions
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15
hw/usb-msd.c
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@ -190,11 +190,7 @@ static void usb_msd_copy_data(MSDState *s)
s->scsi_buf += len;
s->data_len -= len;
if (s->scsi_len == 0 || s->data_len == 0) {
if (s->mode == USB_MSDM_DATAIN) {
s->scsi_dev->info->read_data(s->req);
} else if (s->mode == USB_MSDM_DATAOUT) {
s->scsi_dev->info->write_data(s->req);
}
scsi_req_continue(s->req);
}
}
@ -249,6 +245,7 @@ static void usb_msd_command_complete(SCSIRequest *req, int reason, uint32_t arg)
s->req = NULL;
return;
}
assert((s->mode == USB_MSDM_DATAOUT) == (req->cmd.mode == SCSI_XFER_TO_DEV));
s->scsi_len = arg;
s->scsi_buf = s->scsi_dev->info->get_buf(req);
if (p) {
@ -381,12 +378,8 @@ static int usb_msd_handle_data(USBDevice *dev, USBPacket *p)
scsi_req_enqueue(s->req, cbw.cmd);
/* ??? Should check that USB and SCSI data transfer
directions match. */
if (s->residue == 0) {
if (s->mode == USB_MSDM_DATAIN) {
s->scsi_dev->info->read_data(s->req);
} else if (s->mode == USB_MSDM_DATAOUT) {
s->scsi_dev->info->write_data(s->req);
}
if (s->mode != USB_MSDM_CSW && s->residue == 0) {
scsi_req_continue(s->req);
}
ret = len;
break;