aix设备驱动程序运行失败

[whoisthisman]

如题，在aix上面，编译从http://www.ibm.com/developerworks上面找的代码，能正常通过，但运行时候报错，错误也查找不到资料，没法上google，请求大神帮助：

int main()
{
   struct cfg_load ext_load; /* to load kernel extension */
   struct cfg_dd ddcfg; /* to invoke driver config() */
   char c, str[80];
   int rc;
   int major, minor = 0;
   dev_t devno;

   if((rc = odm_initialize()) == -1)
   {
	   printf("odm_initialize error\n");
	   exit(1);
   }
   printf("\n Enter choice, (l)oad, (u)nload \n");
   while((c = getchar()) < 'a' && c > 'z');

   switch(c) {
      case 'l':
          ext_load.path = "sample_driver";
          ext_load.libpath = NULL;
          ext_load.kmid = 0;

          if(sysconfig(SYS_KLOAD,
          &ext_load, sizeof(struct cfg_load))) {
             printf("Error in loading extension\n");
             exit (1);
          }
          else
             printf("Extension Successfully loaded, kmid is %d\n", ext_load.kmid);

          major = genmajor("sample_driver");
          printf("Major number: %d\n", major);
          devno = makedev64(major, minor);
          ddcfg.kmid = ext_load.kmid;
          ddcfg.devno = devno;
          ddcfg.cmd = CFG_INIT;
          ddcfg.ddsptr = NULL;
          ddcfg.ddslen = 0;

          if (rc = sysconfig(SYS_CFGDD,
             &ddcfg, sizeof(ddcfg))) {
             printf("Error in configuring device %d %d\n", rc, errno);
             exit (1);
          }

其中

          major = genmajor("sample_driver");
          printf("Major number: %d\n", major);

这地方返回-1。

错误运行结果如下：

# ./config_mgr sample_driver

 Enter choice, (l)oad, (u)nload
l
Extension Successfully loaded, kmid is 1354129408
Major number: -1
Error in configuring device -1 1073741823

谁能帮忙看看，非常感谢！