ata_wait
if (ata_wait(ch, request->unit, (ATA_S_READY | ATA_S_DRQ)) < 0) {
if (ata_wait(ch, request->unit, flags) < 0) {
if (ata_wait(ch, request->unit, (ATA_S_READY | ATA_S_DRQ)) < 0) {
static int ata_wait(struct ata_channel *ch, int unit, u_int8_t);
if (ata_wait(ch, request->unit, 0) < 0) {
res = ata_wait(ch, request->unit, 0);