ata_queue_alloc_slot
if (!ata_queue_alloc_slot(chp, &xfer->c_slot, drv_openings))
bool ata_queue_alloc_slot(struct ata_channel *, uint8_t *, uint8_t);
if (!ata_queue_alloc_slot(chp, &c_slot, ATA_MAX_OPENINGS)) {
if (!ata_queue_alloc_slot(chp, &c_slot, ATA_MAX_OPENINGS)) {
if (!ata_queue_alloc_slot(chp, &c_slot, ATA_MAX_OPENINGS)) {
if (!ata_queue_alloc_slot(chp, &c_slot, ATA_MAX_OPENINGS)) {