NXFER
if (drvp->n_dmaerrs >= NERRS_MAX && drvp->n_xfers <= NXFER) {
if (drvp->n_xfers > NXFER) {
if (drvp->n_xfers <= NXFER)
if (drvp->n_xfers <= NXFER)
if ((xfer->c_flags & C_DMA) && (drvp->n_xfers <= NXFER))
if ((xfer->c_flags & C_DMA) && (drvp->n_xfers <= NXFER))