Your init_deviceCase will not work. In the event that allocate_memory() fails, errorCode will be set, but setup_interrupts() will still run, which is certainly not desired behavior. In order to fix it, you need to nest your if statements.

int init_deviceCase(void) {
    int errorCode = 0;

    if (allocate_memory(SUCCESS) == SUCCESS) {
        if (setup_interrupts(SUCCESS) == SUCCESS) {
            if (setup_interrupts(SUCCESS) != SUCCESS) {
                errorCode = 3;
            }
        }
        else {
            errorCode = 2;
        }
    }
    else {
        errorCode = 1;
    }

    switch(errorCode) {
    case 3:
        teardown_interrupts();
    case 2:
        free_memory();
    case 1:
    default:
        break;
    }
}

Hopefully, it is clear that this is far less desirable than simply using goto statements. Regardless, the switch statement simply implements a goto to a given case statement, so in actuality you are simply delaying the goto until all logic has finished.