Module removal-related regression?

[Jakub Kicinski]

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...