Kernel Module Loading Failure After Adding Code to ad9361_dig_tune_tx

[takecareYata]

I added the following code inside the ad9361_dig_tune_tx function in the ad9361_conv.c file( the petalinux version is 2023.1):

for (chan = 0; chan < num_chan; chan++) {
    saved_chan_ctrl0[chan] = axiadc_read(st, ADI_REG_CHAN_CNTRL(chan));
    axiadc_write(st, ADI_REG_CHAN_CNTRL(chan),
        ADI_FORMAT_SIGNEXT | ADI_FORMAT_ENABLE |
        ADI_ENABLE | ADI_IQCOR_ENB);
    axiadc_set_pnsel(st, chan, ADC_PN_CUSTOM);
    saved_chan_ctrl6[chan] = axiadc_read(st, 0x4414 + (chan) * 0x40);

    saved_dsel[chan] = axiadc_read(st, 0x4418 + (chan) * 0x40);
    axiadc_write(st, 0x4418 + (chan) * 0x40, 9);
    axiadc_write(st, 0x4414 + (chan) * 0x40, 0); /* !IQCOR_ENB */
    axiadc_write(st, 0x4044, 1);
}

/* ====================================================== */
do {
    ret = ad9361_dig_tune_delay(phy, max_freq, flags, true);
    if (ret == 0)
        break;

    retry_count++;
    dev_warn(&phy->spi->dev,
             "TX Digital Tune failed (attempt %d/%d)\n",
             retry_count, max_retries);

} while (ret == -EIO && retry_count < max_retries);
/* ====================================================== */

if (flags & DO_ODELAY)
    ad9361_dig_tune_iodelay(phy, true);

The kernel module that worked before the modification now fails to operate, outputting the message: insmod: ERROR: could not insert module /opt/swarm/netdev.ko: Unknown symbol in module.

Could this issue be caused by the newly added code, or is it another problem? I'd appreciate some help.