DRIVER_LINKCHK
if (reqp->dr_flag & DRIVER_LINKCHK) {
if ((reqp->dr_flag & DRIVER_LINKCHK) == 0)
DRIVER_LINKCHK;
if (reqp->dr_flag & DRIVER_LINKCHK)
if (reqp->dr_flag & DRIVER_LINKCHK) {
if (!(reqp->dr_flag & DRIVER_LINKCHK))
(reqp->dr_flag & ~DRIVER_DMAOK) | DRIVER_LINKCHK;
if (reqp->dr_flag & DRIVER_LINKCHK)