rmmod: ERROR: Module A is in use by:B
参考
方法
First, find out, which other modules use the module A:
lsmod | grep A
You will get a list like this:
module size used_by（B）
Try unloading these modules (used_by) before or together with the module you want to unload:
sudo modprobe -r <module found from lsmod（B）> <module you want to remove（A）>
If you want to prevent the module from loading on the next boot, add it to the blacklist:
echo -e "sdhci\n" | sudo tee -a /etc/modprobe.d/blacklist.conf
