已经编译好的zImage驱动进入了开发板，结果是这样！

第一次试还可以，第二次重新烧写了文件系统，恢复第一次的操作怎么就不行了，出现这样的问题：block 887 is bad
block 1774 is bad
block 1814 is bad
block 1912 is bad
yaffs_read_super: isCheckpointed 0
VFS: Mounted root (yaffs filesystem) on device 31:2.
Freeing init memory: 188K
rmmod: can't unload 'demo': unknown symbol in module, or unknown parameter
Start Qt-4.5
demo can't register major number
insmod: can't insert '/etc/rc.d/init.d/demo.ko': Device or resource busy
usbcore: registered new interface driver rt73usb


[img]file:///C:\Users\lenovo\AppData\Roaming\Tencent\Users\739650838\QQ\WinTemp\RichOle\4P$9[7XS9XSVFRKLWH%]C6N.jpg[/img]

我试着rmmod demo.ko也不行！这是什么原因，驱动方面的

demo can't register major number
主设备号不对吧