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uas: Fix / cleanup usb_uas_task error handling 

-The correct error if we cannot find the dev is INCORRECT_LUN rather then
 INVALID_INFO_UNIT
-Move the device not found check to the top so we only need to do it once
-Remove the dev->lun != lun checks, dev is returned by scsi_device_find
 which searches by lun, so this will never trigger

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Hans de Goede 2013-10-24 18:15:51 +01:00 committed by Gerd Hoffmann
parent d4bfc7b9f3
commit 5eb6d9e3ef
1 changed files with 3 additions and 17 deletions
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20
hw/usb/dev-uas.c
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@ -746,17 +746,14 @@ static void usb_uas_task(UASDevice *uas, uas_ui *ui)
if (req) {
goto overlapped_tag;
}
if (dev == NULL) {
goto incorrect_lun;
}
switch (ui->task.function) {
case UAS_TMF_ABORT_TASK:
task_tag = be16_to_cpu(ui->task.task_tag);
trace_usb_uas_tmf_abort_task(uas->dev.addr, tag, task_tag);
if (dev == NULL) {
goto bad_target;
}
if (dev->lun != lun) {
goto incorrect_lun;
}
req = usb_uas_find_request(uas, task_tag);
if (req && req->dev == dev) {
scsi_req_cancel(req->req);
@ -766,12 +763,6 @@ static void usb_uas_task(UASDevice *uas, uas_ui *ui)
case UAS_TMF_LOGICAL_UNIT_RESET:
trace_usb_uas_tmf_logical_unit_reset(uas->dev.addr, tag, lun);
if (dev == NULL) {
goto bad_target;
}
if (dev->lun != lun) {
goto incorrect_lun;
}
qdev_reset_all(&dev->qdev);
usb_uas_queue_response(uas, tag, UAS_RC_TMF_COMPLETE, 0);
break;
@ -787,11 +778,6 @@ overlapped_tag:
usb_uas_queue_response(uas, req->tag, UAS_RC_OVERLAPPED_TAG, 0);
return;
bad_target:
/* FIXME: correct? [see long comment in usb_uas_command()] */
usb_uas_queue_response(uas, tag, UAS_RC_INVALID_INFO_UNIT, 0);
return;
incorrect_lun:
usb_uas_queue_response(uas, tag, UAS_RC_INCORRECT_LUN, 0);
}