Hi Yuusuke,
Thank you for the patch! Yet something to improve:
[auto build test ERROR on ipvs/master]
[also build test ERROR on linus/master v5.8-rc7 next-20200729]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as doc
ravb is a module driver, but I cannot rmmod it after insmod it.
ravb does mdio_init() at the time of probe, and module->refcnt is incremented
by alloc_mdio_bitbang() called after that.
Therefore, even if ifup is not performed, the driver is in use and rmmod cannot
be performed.
$ lsmod
Module
