Can't remove linux kernel module, yet also cannot install module

Question

I have a simple scull module I have loaded with:

sudo insmod scull.ko

This worked fine, but I changed something in the src and recompiled, now I want to remove the old module and re-install it.

I've tried

sudo rmmod scull.ko

Which returns with rmmod: ERROR: Module scull is not currently loaded

Yet trying to re-install gives insmod: ERROR: could not insert module scull.ko: File exists

What the hell?

Answer 1

可能不再相关，但这可能是因为（如果您使用 sysfs）您没有删除 sysfs 类，因此它无法创建文件。