关于LINUX配置描述符usb_parse_confiuratiion中一小段代码的疑问

本人模拟出内核usb_parse_confiuratiion函数中一小段代码如下：
static void Main(string[] args)  
       {           
            int[] ms;
            ms = new int[20];
            int[] nalts;
            nalts= new int[20];
            int[] inum;   
            inum=new int []{1,2,3,6,5,4,8,9,7,10};
          int i,n,p;
          n=0;
          p=0;
          do while (p < 10)
              {
                  for (i = 0; i < n; ++i)
                  {
                      if (ms[i] == inum[p])
                          break;
                  }
                  if (i < n)
                  {
                      ++nalts[i];
                  }
                  else
                  {
                      ms[n] = inum[p];
                      nalts[n] = 1;
                      ++n;
                  }
                  p++;
              } while (p < 10);

        }
    }
其中inum[p]表示不断收到的接口号，书上说ms[n]返回的是由接口序列号组成的数组，对应的nalts[n]是由各个接口号中的设置数组成的数组，但本人调试后发现ms[n]返回是不断收到的接口号，nalts[n]返回的全是1，（内核地址：drivers/usb/core/config.c中原代码如下：
for (i = 0; i < n; ++i) {
                if (inums[i] == inum)
                    break;
            }
            if (i < n) {
                if (nalts[i] < 255)
                    ++nalts[i];
            } else if (n < USB_MAXINTERFACES) {
                inums[n] = inum;
                nalts[n] = 1;
                ++n;
            }
求高人指点！


[ 本帖最后由 hb0zyj 于 2011-9-22 11:11 编辑 ]