c - Ioctl params values (cmd and arg) are showing same, even i sent different values -

i'm trying read ioctl params sent application. in driver side cmd , arg (3rd , 4th arguments) values coming same, if send different values. both params showing argument value isent application. can 1 me solve this? here code : application : ioctl(fd,0,1). driver ioctl : cmd = 1. arg = 1.

int char_ioctl(struct inode *inode_num, struct file *fp, unsigned int cmd, unsigned long arg)  {     int ret = 0,i;      printk("cmd : %d\n",cmd);     printk("arg : %d\n",(unsigned long)arg);      switch(cmd)     {        case getcapacity:           ret = buffer_max_size;           break;         default :           break;      }      return ret;  }