static void
ieee80211_swscan_detach(struct ieee80211com *ic)
{
struct ieee80211_scan_state *ss = ic->ic_scan;
if (ss != NULL) {
scan_signal(ss, ISCAN_ABORT);
ieee80211_draintask(ic, &SCAN_PRIVATE(ss)->ss_scan_start);
taskqueue_drain_timeout(ic->ic_tq,
&SCAN_PRIVATE(ss)->ss_scan_curchan);
KASSERT((ic->ic_flags & IEEE80211_F_SCAN) == 0,
("scan still running"));
/*
* For now, do the ss_ops detach here rather
* than ieee80211_scan_detach().
*
* I'll figure out how to cleanly split things up
* at a later date.
*/
if (ss->ss_ops != NULL) {
ss->ss_ops->scan_detach(ss);
ss->ss_ops = NULL;
}
ic->ic_scan = NULL;
IEEE80211_FREE(SCAN_PRIVATE(ss), M_80211_SCAN);
}
}
void
altera_sdcard_detach(struct altera_sdcard_softc *sc)
{
KASSERT(sc->as_taskqueue != NULL, ("%s: taskqueue not present",
__func__));
/*
* Winding down the driver on detach is a bit complex. Update the
* flags to indicate that a detach has been requested, and then wait
* for in-progress I/O to wind down before continuing.
*/
ALTERA_SDCARD_LOCK(sc);
sc->as_flags |= ALTERA_SDCARD_FLAG_DETACHREQ;
while (sc->as_state != ALTERA_SDCARD_STATE_DETACHED)
ALTERA_SDCARD_CONDVAR_WAIT(sc);
ALTERA_SDCARD_UNLOCK(sc);
/*
* Now wait for the possibly still executing taskqueue to drain. In
* principle no more events will be scheduled as we've transitioned to
* a detached state, but there might still be a request in execution.
*/
while (taskqueue_cancel_timeout(sc->as_taskqueue, &sc->as_task, NULL))
taskqueue_drain_timeout(sc->as_taskqueue, &sc->as_task);
/*
* Simulate a disk removal if one is present to deal with any pending
* or queued I/O.
*/
if (sc->as_disk != NULL)
altera_sdcard_disk_remove(sc);
KASSERT(bioq_first(&sc->as_bioq) == NULL,
("%s: non-empty bioq", __func__));
/*
* Free any remaining allocated resources.
*/
taskqueue_free(sc->as_taskqueue);
sc->as_taskqueue = NULL;
ALTERA_SDCARD_CONDVAR_DESTROY(sc);
ALTERA_SDCARD_LOCK_DESTROY(sc);
}
