PSNS_REQ
if ((bus_space_read_1(iot, ioh, PSNS) & PSNS_REQ) != 0)
if ((bus_space_read_1(iot, ioh, PSNS) & PSNS_REQ) == 0) {
while ((bus_space_read_1(iot, ioh, PSNS) & PSNS_REQ) == 0)
if ((bus_space_read_1(iot, ioh, PSNS) & PSNS_REQ) != 0)
while ((hd->scsi_psns & PSNS_REQ) == 0) {
while (hd->scsi_psns & PSNS_REQ)
while (hd->scsi_psns & PSNS_REQ)
while ((hd->scsi_psns & PSNS_REQ) == 0) {