AT_WAIT
wd_get_params(wd, AT_WAIT, &wd->sc_params);
wd_flushcache(wd, AT_WAIT);
error = wd_flushcache(wd, AT_WAIT);
xfer = wdc_get_xfer(wdc_c->flags & AT_WAIT ? WDC_CANSLEEP :
if (wdc_c->flags & AT_WAIT) {
if (wdc_c->flags & AT_WAIT)
wdc_c.flags = AT_WAIT;
at_poll = AT_WAIT;