static void
ue_queue_command(struct usb_ether *ue,
usb_proc_callback_t *fn,
struct usb_proc_msg *t0, struct usb_proc_msg *t1)
{
struct usb_ether_cfg_task *task;
UE_LOCK_ASSERT(ue, MA_OWNED);
if (usb_proc_is_gone(&ue->ue_tq)) {
return; /* nothing to do */
}
/*
* NOTE: The task cannot get executed before we drop the
* "sc_mtx" mutex. It is safe to update fields in the message
* structure after that the message got queued.
*/
task = (struct usb_ether_cfg_task *)
usb_proc_msignal(&ue->ue_tq, t0, t1);
/* Setup callback and self pointers */
task->hdr.pm_callback = fn;
task->ue = ue;
/*
* Start and stop must be synchronous!
*/
if ((fn == ue_start_task) || (fn == ue_stop_task))
usb_proc_mwait(&ue->ue_tq, t0, t1);
}
/*
* Return values:
* 0: normal
* else: taskqueue is draining or gone
*/
uint8_t
ucom_cfg_is_gone(struct ucom_softc *sc)
{
struct ucom_super_softc *ssc = sc->sc_super;
return (usb_proc_is_gone(&ssc->sc_tq));
}
/*------------------------------------------------------------------------*
* usbd_do_request_proc - factored out code
*
* This function is factored out code. It does basically the same like
* usbd_do_request_flags, except it will check the status of the
* passed process argument before doing the USB request. If the
* process is draining the USB_ERR_IOERROR code will be returned. It
* is assumed that the mutex associated with the process is locked
* when calling this function.
*------------------------------------------------------------------------*/
usb_error_t
usbd_do_request_proc(struct usb_device *udev, struct usb_process *pproc,
struct usb_device_request *req, void *data, uint16_t flags,
uint16_t *actlen, usb_timeout_t timeout)
{
usb_error_t err;
uint16_t len;
/* get request data length */
len = UGETW(req->wLength);
/* check if the device is being detached */
if (usb_proc_is_gone(pproc)) {
err = USB_ERR_IOERROR;
goto done;
}
/* forward the USB request */
err = usbd_do_request_flags(udev, pproc->up_mtx,
req, data, flags, actlen, timeout);
done:
/* on failure we zero the data */
/* on short packet we zero the unused data */
if ((len != 0) && (req->bmRequestType & UE_DIR_IN)) {
if (err)
memset(data, 0, len);
else if (actlen && *actlen != len)
memset(((uint8_t *)data) + *actlen, 0, len - *actlen);
}
return (err);
}
/*
* Return values:
* 0: success
* Else: device has been detached
*/
uint8_t
uether_pause(struct usb_ether *ue, unsigned int _ticks)
{
if (usb_proc_is_gone(&ue->ue_tq)) {
/* nothing to do */
return (1);
}
usb_pause_mtx(ue->ue_mtx, _ticks);
return (0);
}
static void
ucom_queue_command(struct ucom_softc *sc,
usb_proc_callback_t *fn, struct termios *pt,
struct usb_proc_msg *t0, struct usb_proc_msg *t1)
{
struct ucom_super_softc *ssc = sc->sc_super;
struct ucom_param_task *task;
UCOM_MTX_ASSERT(sc, MA_OWNED);
if (usb_proc_is_gone(&ssc->sc_tq)) {
DPRINTF("proc is gone\n");
return; /* nothing to do */
}
/*
* NOTE: The task cannot get executed before we drop the
* "sc_mtx" mutex. It is safe to update fields in the message
* structure after that the message got queued.
*/
task = (struct ucom_param_task *)
usb_proc_msignal(&ssc->sc_tq, t0, t1);
/* Setup callback and softc pointers */
task->hdr.pm_callback = fn;
task->sc = sc;
/*
* Make a copy of the termios. This field is only present if
* the "pt" field is not NULL.
*/
if (pt != NULL)
task->termios_copy = *pt;
/*
* Closing the device should be synchronous.
*/
if (fn == ucom_cfg_close)
usb_proc_mwait(&ssc->sc_tq, t0, t1);
/*
* In case of multiple configure requests,
* keep track of the last one!
*/
if (fn == ucom_cfg_start_transfers)
sc->sc_last_start_xfer = &task->hdr;
}
uint8_t
uether_is_gone(struct usb_ether *ue)
{
return (usb_proc_is_gone(&ue->ue_tq));
}
