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常见模块挂载命令和mx6q挂载报错

2020-8-28 13:46| 发布者: zhichao| 查看: 683| 评论: 0|来自: 网络

类目: 知识库  >  I.MX6系列产品     文档编号: 408

常见挂载命令如下:
lsmod查看某个模块是否安装,比如8723的模块wlan.ko
root@imx6qsabresd:~# lsmod | grep "wlan"
wlan                 1298093  0
root@imx6qsabresd:~# lsmod
Module Size Used by
wlan 1298093 0
mxc_dcic 6544 0

modinfo 显示模块信息
root@imx6qsabresd:~# modinfo wlan
filename:       /lib/modules/4.1.15-dirty/kernel/drivers/net/wireless/rtl8723bu/wlan.ko
version:        v5.2.17.1_26947.20180307_COEX20180201-6f52
author:         Realtek Semiconductor Corp.
description:    Realtek Wireless Lan Driver
license:        GPL
srcversion:     A521C177A5CC6BD34703563
alias:          usb:v0BDApB720d*dc*dsc*dp*icFFiscFFipFFin*
depends:
intree:         Y
vermagic:       4.1.15-dirty SMP preempt mod_unload modversions ARMv7 p2v8
parm:           rtw_ips_mode:The default IPS mode (int)
parm:           rtw_lps_level:The default LPS level (int)
... ...(内容较多,此处省略)

rmmod 卸载模块,但是内核会认为卸载模块不安全,可以添加命令强制卸载。
root@imx6qsabresd:~# rmmod wlan.ko
[ 1510.613435] usbcore: deregistering inte**ce driver rtl8723bu

insmod 加载模块,需要指定完整的路径和模块名字 模块依赖及路径信息,这样子才可以成功加载需要模块。查看模块依赖关系可用modinfo查看
root@imx6qsabresd:~# insmod /lib/modules/wlan.ko
[ 1670.739544] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[ 1670.747868] usbcore: registered new inte**ce driver rtl8723bu

编译内核后加载板子自带的wlan.ko可能报错,例如
root@imx6qsabresd:/lib/modules# insmod wlan.ko
[683971.524736] wlan: disagrees about version of symbol skb_pull
[683971.530524] wlan: Unknown symbol skb_pull (err -22)
[683971.536521] wlan: disagrees about version of symbol netif_napi_del
[683971.542819] wlan: Unknown symbol netif_napi_del (err -22)
[683971.548497] wlan: disagrees about version of symbol __cfg80211_alloc_event_skb
[683971.555863] wlan: Unknown symbol __cfg80211_alloc_event_skb (err -22)
[683971.562431] wlan: disagrees about version of symbol wiphy_register
[683971.568981] wlan: Unknown symbol wiphy_register (err -22)
[683971.574580] wlan: disagrees about version of symbol nla_put
... ...(内容较多,此处省略)
是由于重新编译了内核,而内核模块没有重新编译,导致无法找到一些模块的标志。
解决方法:
重新编译一遍内核模块,保持与当前板子上的内核版本一致即可。

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