Hi,
在 2025/07/31 9:28, Hou Tao 写道:
cc +linux-block
The disk->queue_kobj is initialized in add_disk() and is uninitialized
in del_disk(). And it seems that blk_unregister_queue() in del_disk()
doesn't uninitialize the queue_kobj completely, because it doesn't
expect the queue_kobj will be added again. I think the right place to
fix the problem is blk_unregister_queue(). How about just memset the
queue_kobj as zero after deleting the queue_kobj in blk_unregister_queue() ?
I think it's better to move kobject_init to allocate disk:
1) alloc disk, kobject_init
2) register q, kobject_add
3) unregister q, kobject_del
4) free disk, kobject_put
With this, it's safe to add the kobject again.
Thanks,
Kuai
