My PC hung unexpectedly

Hello master, I have some problems. when I try to implementing config for mtp, my pc become hang after i execute ioctl., it's like there's something wrong with the kernel.

Please give me some advice... 

Thank you..

the code is like this one :
------------------------------------------------------------
RESULT mtpi_config(base_str_t *b)
{
    struct {
        mtp_config_t conf;
        mtp_conf_na_t na;
    } mc_na;
    struct {
        mtp_config_t conf;
        mtp_conf_sp_t sp;
    } mc_sp;
    mc_na.conf.type = MTP_OBJ_TYPE_NA;
    mc_na.conf.id = 1;
    mc_na.conf.cmd = MTP_ADD;
    mc_na.na.options.pvar = SS7_PVAR_ITUT_96;
    mc_na.na.options.popt = SS7_POPT_HSL;
    mc_na.na.mask.member = 0x11;
    mc_na.na.mask.cluster = 0x22;
    mc_na.na.mask.network = 0x33;
    mc_na.na.sls_bits = 4;

    struct strioctl ic;
    ic.ic_cmd = MTP_IOCSCONFIG;
    ic.ic_timout = 0;
    ic.ic_len = sizeof(mc_na);
    ic.ic_dp = (char*)&mc_na;
    if ( ioctl(b->mtpi.fd, I_STR, &ic) < 0 ) 
        perror("ioctl config");
    
    mc_sp.conf.type = MTP_OBJ_TYPE_SP;
    mc_sp.conf.id = 1;
    mc_sp.conf.cmd = MTP_ADD;
    mc_sp.sp.naid = 1;
    mc_sp.sp.users = 1;
    mc_sp.sp.pc = 0x00112233;
    mc_sp.sp.flags = RSF_XFER_FUNC;
    ic.ic_cmd = MTP_IOCSCONFIG;
    ic.ic_timout = 0;
    ic.ic_len = sizeof(mc_sp);
    ic.ic_dp = (char*)&mc_sp;

    if ( ioctl(b->mtpi.fd, I_STR, &ic) < 0 )
        perror("ioctl config");

    return __RESULT_SUCCESS;
}
--------------------------------------------------------------

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