Why I can't uninstall bcmdhd_pcie module?

Autonomous Machines Jetson & Embedded Systems Jetson Nano
1

Hi guys,

How to remove bcmdhd_pcie module?

sercomm@localhost:~$ cat /etc/nv_tegra_release
# R32 (release), REVISION: 3.1, GCID: 18186506, BOARD: t210ref, EABI: aarch64, DATE: Tue Dec 10 06:58:34 UTC 2019
sercomm@localhost:~$ uname -a
Linux localhost 4.9.140-tegra #1 SMP PREEMPT Mon Dec 9 22:47:42 PST 2019 aarch64 aarch64 aarch64 GNU/Linux

sercomm@localhost:/lib/modules/4.9.140-tegra/kernel/drivers/net/wireless/bcmdhd_pcie$ lsmod | grep bcmdhd_pcie
bcmdhd_pcie           892308  -1
cfg80211              589351  1 bcmdhd_pcie

sercomm@localhost:/lib/modules/4.9.140-tegra/kernel/drivers/net/wireless/bcmdhd_pcie$ sudo modprobe -r bcmdhd_pcie cfg80211
modprobe: ERROR: ../libkmod/libkmod-module.c:793 kmod_module_remove_module() could not remove 'bcmdhd_pcie': Device or resource busy
modprobe: FATAL: Module cfg80211 is in use.

sercomm@localhost:/lib/modules/4.9.140-tegra/kernel/drivers/net/wireless/bcmdhd_pcie$ sudo rmmod bcmdhd_pcie
rmmod: ERROR: Module bcmdhd_pcie is in use

Thanks

2

Please disable those interfaces that are using these driver.

For example, on TX2, we need to disable wlan0 before removing bcmdhd.

3

Hi WayneWWW,

Thanks

Could tell how to figure out what interface is usig the bcmdhd_pcie module?

4

I guess it should be also wlan0. Please check if you have any extra wifi interface there.

5

Hi WayneWWW,

I just test the bcmdhd_pcie module on original official devkit without any extral components. Are there some commands or scripts to show the interface a module is using?

6

I meant ifconfig.