ATA_ID_FW_REV_LEN
char fwrevbuf[ATA_ID_FW_REV_LEN+1];
unsigned char model_rev[ATA_ID_FW_REV_LEN + 1];
unsigned char model_rev[ATA_ID_FW_REV_LEN + 1];
ata_id_string(dev->id, buf, ATA_ID_FW_REV, ATA_ID_FW_REV_LEN);
if (copy_to_user(dst + ATA_ID_FW_REV, buf, ATA_ID_FW_REV_LEN))
ATA_ID_FW_REV_LEN + ATA_ID_PROD_LEN) == 0) {