[+CC: Tejun Heo <tj@kernel.org>, for being very active in lib/idr.c]

Hi,

On Tue, Jul 14, 2015 at 11:16:14AM +0200, Johannes Thumshirn wrote:
> Destroy IDRs on module exit, freeing the resources for
> * bq2415x_charger.c
> * ds2782_battery.c
> * ltc2941-battery-gauge.c

You missed bq27x00_battery.c. Maybe a coccinelle script should be
written?

> The drivers had to be converted to "ordinary" module_init()/module_exit()
> style drivers instead of using module_i2c_driver.

mh I would prefer another solution. How about adding something
like this:

static void idr_remove_and_destroy(struct idr *idp, int id)
{
    idr_remove(idp, id);
    if (idr_is_empty(idp)
        idr_destroy(idp);
}

If that is called by the drivers instead of idr_remove(), there
should be no need for adding idr_destroy to module_exit().

-- Sebastian