linux-kernel - Re: question about drivers/pinctrl/pinctrl-at91.c

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Date:	Tue, 11 Dec 2012 10:59:27 +0100 (CET)
From:	Julia Lawall <julia.lawall@...6.fr>
To:	Linus Walleij <linus.walleij@...aro.org>
cc:	Julia Lawall <julia.lawall@...6.fr>, plagnioj@...osoft.com,
	grant.likely@...retlab.ca, rob.herring@...xeda.com,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	devicetree-discuss@...ts.ozlabs.org
Subject: Re: question about drivers/pinctrl/pinctrl-at91.c

On Tue, 11 Dec 2012, Linus Walleij wrote:

> On Tue, Dec 11, 2012 at 10:04 AM, Julia Lawall <julia.lawall@...6.fr> wrote:
> > On Tue, 11 Dec 2012, Linus Walleij wrote:
>
> >> I was under the impression that if you exit the probe function
> >> with a negative value anything allocated with devm_* was freed
> >> immediately, that is atleast how it's described in
> >> Documentation/driver-model/devres.txt
> >> atleast that seems to be the intetion with the whole thing.
> >
> > That is true, but I wasn't sure taht this function was part of the probe
> > function.  Its only reference is in:
> >
> > static struct pinctrl_ops at91_pctrl_ops = {
> >         .get_groups_count       = at91_get_groups_count,
> >         .get_group_name         = at91_get_group_name,
> >         .get_group_pins         = at91_get_group_pins,
> >         .pin_dbg_show           = at91_pin_dbg_show,
> >         .dt_node_to_map         = at91_dt_node_to_map,
> >         .dt_free_map            = at91_dt_free_map,
> > };
> >
> > Working backwards, one possible call site is pinctrl_get, which is an
> > exported function.  Is it safe to assume that it will always be called
> > from within a probe function?
>
> Aha sorry I got it all backwards :-(
>
> Well, yes in that case it's devm_kfree() for sure.

I've sent a patch, thanks.

julia
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