int
mtcommand(dev_t dev, int cmd, int cnt)
{
struct mt_softc *sc;
struct buf *bp;
int error = 0;
sc = device_lookup_private(&mt_cd, MTUNIT(dev));
bp = &sc->sc_bufstore;
if (bp->b_cflags & BC_BUSY)
return (EBUSY);
bp->b_cmd = cmd;
bp->b_dev = dev;
bp->b_objlock = &buffer_lock;
do {
bp->b_cflags = BC_BUSY;
bp->b_flags = B_CMD;
bp->b_oflags = 0;
mtstrategy(bp);
biowait(bp);
if (bp->b_error != 0) {
error = (int) (unsigned) bp->b_error;
break;
}
} while (--cnt > 0);
#if 0
bp->b_cflags = 0 /*&= ~BC_BUSY*/;
#else
bp->b_cflags &= ~BC_BUSY;
#endif
return (error);
}
static int
mtcommand(dev_t dev, int cmd, int cnt)
{
struct mt_softc *sc = device_lookup_private(&mt_cd,UNIT(dev));
struct buf *bp = &sc->sc_bufstore;
int error = 0;
#if 1
if (bp->b_cflags & BC_BUSY)
return EBUSY;
#endif
bp->b_cmd = cmd;
bp->b_dev = dev;
do {
bp->b_cflags = BC_BUSY;
bp->b_flags = B_CMD;
mtstrategy(bp);
biowait(bp);
if (bp->b_error != 0) {
error = bp->b_error;
break;
}
} while (--cnt > 0);
#if 0
bp->b_flags = 0 /*&= ~BC_BUSY*/;
#else
bp->b_flags &= ~BC_BUSY;
#endif
return error;
}
