我是新手，
我做的scull驱动例子，怎么总是挂机，那里错了？下边是我的代码。
两个文件scull.h,scull.c
我调试发现：scull_open函数被执行时，inode->i_cdev地址为0，
但在scull_init中cdev的地址是正确的。
感觉初始化没成功？

输出打印结果：
scull begin >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
result= 0 scull_major=253 scull_minor=0
(int)scull_devices->cdev: 4008  sizeof(*scull_devices->cdev):144
sizeof(scull_devices): 4152  scull_devices:995450880
(int)scull_devices->cdev: 995454888  sizeof(*scull_devices->cdev):144
(int)scull_devices->cdev: 995454888  sizeof(*scull_devices->cdev):144
scull_major: 253    scull_minor:0
(int)dev->cdev: 995454888  sizeof(*dev->cdev):144
(int)dev->cdev: 995454888  sizeof(*dev->cdev):144
dev->data is  hello 
(int)dev->cdev: 995454888  sizeof(*dev->cdev):144
(int)dev->cdev: 995454888  sizeof(*dev->cdev):144
scull_setup_cdev scull_devices->data:hello ---- len: 0
scull_setup_cdev:Error is  0 
scull_open  sizeof(inode->i_cdev):8 
scull_open inode->i_cdev:0 
scull_open end 
 copy_from_user    scull dev test0   16 
 copy_from_user   scull dev test0   16 
}

呵呵 我也是刚学