pcie设备驱动卸载与加载

在linux系统在PCIE设备驱动被占用的情况下可以通过以下脚本卸载当前驱动、加载新驱动：

#!/bin/sh

echo "update nvme driver..."

cd /sys/bus/pci/drivers/nvme

#讲pcie设备驱动解绑

echo -n "0000:11:00.0" > unbind

#移除pcie总线上的设备

echo 1 > /sys/bus/pci/devices/0000:11:00.0/remove

#卸载当前安装驱动，这里以nvme驱动为例

rmmod nvme.ko

echo "uninstall old nvme driver finished!"

#加载新的nvme驱动

insmod /home/kylin/nvme_new.ko

echo "install new nvme driver finished!"

#重新扫描设备，将设备挂到pcie总线

sudo echo 1 > /sys/bus/pci/rescan

echo "update nvme driver finished!"