static void handle_reg_h2d_fis(AHCIState *s, int port,
                               uint8_t slot, uint8_t *cmd_fis)
{
    IDEState *ide_state = &s->dev[port].port.ifs[0];
    AHCICmdHdr *cmd = get_cmd_header(s, port, slot);
    uint16_t opts = le16_to_cpu(cmd->opts);

    if (cmd_fis[1] & 0x0F) {
        DPRINTF(port, "Port Multiplier not supported."
                " cmd_fis[0]=%02x cmd_fis[1]=%02x cmd_fis[2]=%02x\n",
                cmd_fis[0], cmd_fis[1], cmd_fis[2]);
        return;
    }

    if (cmd_fis[1] & 0x70) {
        DPRINTF(port, "Reserved flags set in H2D Register FIS."
                " cmd_fis[0]=%02x cmd_fis[1]=%02x cmd_fis[2]=%02x\n",
                cmd_fis[0], cmd_fis[1], cmd_fis[2]);
        return;
    }

    if (!(cmd_fis[1] & SATA_FIS_REG_H2D_UPDATE_COMMAND_REGISTER)) {
        switch (s->dev[port].port_state) {
        case STATE_RUN:
            if (cmd_fis[15] & ATA_SRST) {
                s->dev[port].port_state = STATE_RESET;
            }
            break;
        case STATE_RESET:
            if (!(cmd_fis[15] & ATA_SRST)) {
                ahci_reset_port(s, port);
            }
            break;
        }
        return;
    }

    /* Check for NCQ command */
    if (is_ncq(cmd_fis[2])) {
        process_ncq_command(s, port, cmd_fis, slot);
        return;
    }

    /* Decompose the FIS:
     * AHCI does not interpret FIS packets, it only forwards them.
     * SATA 1.0 describes how to decode LBA28 and CHS FIS packets.
     * Later specifications, e.g, SATA 3.2, describe LBA48 FIS packets.
     *
     * ATA4 describes sector number for LBA28/CHS commands.
     * ATA6 describes sector number for LBA48 commands.
     * ATA8 deprecates CHS fully, describing only LBA28/48.
     *
     * We dutifully convert the FIS into IDE registers, and allow the
     * core layer to interpret them as needed. */
    ide_state->feature = cmd_fis[3];
    ide_state->sector = cmd_fis[4];      /* LBA 7:0 */
    ide_state->lcyl = cmd_fis[5];        /* LBA 15:8  */
    ide_state->hcyl = cmd_fis[6];        /* LBA 23:16 */
    ide_state->select = cmd_fis[7];      /* LBA 27:24 (LBA28) */
    ide_state->hob_sector = cmd_fis[8];  /* LBA 31:24 */
    ide_state->hob_lcyl = cmd_fis[9];    /* LBA 39:32 */
    ide_state->hob_hcyl = cmd_fis[10];   /* LBA 47:40 */
    ide_state->hob_feature = cmd_fis[11];
    ide_state->nsector = (int64_t)((cmd_fis[13] << 8) | cmd_fis[12]);
    /* 14, 16, 17, 18, 19: Reserved (SATA 1.0) */
    /* 15: Only valid when UPDATE_COMMAND not set. */

    /* Copy the ACMD field (ATAPI packet, if any) from the AHCI command
     * table to ide_state->io_buffer */
    if (opts & AHCI_CMD_ATAPI) {
        memcpy(ide_state->io_buffer, &cmd_fis[AHCI_COMMAND_TABLE_ACMD], 0x10);
        debug_print_fis(ide_state->io_buffer, 0x10);
        s->dev[port].done_atapi_packet = false;
        /* XXX send PIO setup FIS */
    }

    ide_state->error = 0;

    /* Reset transferred byte counter */
    cmd->status = 0;

    /* We're ready to process the command in FIS byte 2. */
    ide_exec_cmd(&s->dev[port].port, cmd_fis[2]);
}

The product does not release a resource after its effective lifetime has ended, i.e., after the resource is no longer needed.