On 10/19/2011 02:18 PM, Daniel Baluta wrote:
> On Wed, Oct 19, 2011 at 7:04 PM, Kai Meyer<
kai@xxxxxxxxxx>
wrote:
>> I can't seem to get my character device to remove
itself from the
>> /proc/devices list. I'm calling all of the
following functions like so:
>>
>> alloc_chrdev_region(&dev, 0, 5, "my_char");
>> cdev_init(&my_cdev,&my_ops);
>> cdev_add(&my_cdev, MKDEV(my_major, my_minor),
1);
>> cdev_del(&my_cdev);
>> unregister_chrdev_region(my_major, 5);
>>
>> It seems like I'm missing something, but I can't
find it. I'm
>> referencing the Linux Device Drivers v3, chapter
3. In the example code,
>> the scull_cleanup_module function calls cdev_dell
and
>> unregister_chrdev_region, just like I do.
>>
>> To be clear, after I unload my module (after
calling cdev_del and
>> unregister_chrdev_region), my "my_char" string
still shows up in
>> /proc/devices.
> Did you check return codes for all functions?
> Also, can you post a link to the code?
>
> thanks,
> Daniel.
>
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