linux-kernel - Re: [PATCH] power: Destroy IDRs on module exit

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Date:	Tue, 14 Jul 2015 12:19:48 +0200
From:	Sebastian Reichel <sre@...nel.org>
To:	Johannes Thumshirn <jthumshirn@...e.de>
Cc:	Pali Rohár <pali.rohar@...il.com>,
	Dmitry Eremin-Solenikov <dbaryshkov@...il.com>,
	David Woodhouse <dwmw2@...radead.org>,
	linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
	Tejun Heo <tj@...nel.org>
Subject: Re: [PATCH] power: Destroy IDRs on module exit

[+CC: Tejun Heo <tj@...nel.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

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