Re: [bisected] Re: Module removal-related regression?

Dmitry Torokhov
2017-09-09T19:55:54Z

On Sat, Sep 9, 2017 at 12:27 PM, Jakub Kicinski <kubakici@wp.pl> wrote:
> On Sat, 9 Sep 2017 19:41:21 +0200, Jakub Kicinski wrote:
>> Hi!
>>
>> I'm having trouble with modules on linux/master. rmmod succeeds but the
>> module is still loaded and the refcount goes to 1:
>>
>> #rmmod nfp; insmod ./src/nfp.ko nfp_pf_netdev=0 ; \
>> /opt/netronome/bin/nfp-hwinfo -n 2 assembly.partno \
>> lsmod | grep nfp; \
>> rmmod nfp; \
>> lsmod | grep nfp
>> nfp 249856 0
>> nfp 200704 1
>>
>> If I rmmod again the module will be actually unloaded. The user space
>> is mostly Ubuntu 14.04. Has anyone seen this? I'm trying to bisect
>> now...
>
> Got 'em!
>
> commit 1455cf8dbfd06aa7651dcfccbadb7a093944ca65 (HEAD, refs/bisect/bad)
> Author: Dmitry Torokhov <dmitry.torokhov@gmail.com>
> Date: Wed Jul 19 17:24:30 2017 -0700
>
> driver core: emit uevents when device is bound to a driver

Does it happen with all modules or only nfp one?

It seems to work here:

dtor@dtor-glaptop3:~ $ lsmod | grep psmouse
psmouse 135168 0
dtor@dtor-glaptop3:~ $ sudo rmmod psmouse
dtor@dtor-glaptop3:~ $ lsmod | grep psmouse
dtor@dtor-glaptop3:~ $ sudo modprobe psmouse

Thanks.

--
Dmitry