linux-kernel - Re: [PATCH] gpio: mvebu: fix irq domain leak

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Message-ID: <20230719134036.w5lsqxcg6u3v3ynm@pengutronix.de>
Date:   Wed, 19 Jul 2023 15:40:36 +0200
From:   Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     Bartosz Golaszewski <brgl@...ev.pl>,
        Thierry Reding <thierry.reding@...il.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Andy Shevchenko <andy@...nel.org>, linux-pwm@...r.kernel.org,
        linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: Re: [PATCH] gpio: mvebu: fix irq domain leak

On Wed, Jul 19, 2023 at 04:02:39PM +0300, Andy Shevchenko wrote:
> On Wed, Jul 19, 2023 at 2:41 PM Bartosz Golaszewski <brgl@...ev.pl> wrote:
> >
> > From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> >
> > Uwe Kleine-König pointed out we still have one resource leak in the mvebu
> > driver triggered on driver detach. Let's address it with a custom devm
> > action.
> 
> One nit-pick below, in either case
> Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>
> 
> > Fixes: 812d47889a8e ("gpio/mvebu: Use irq_domain_add_linear")
> > Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> > ---
> >  drivers/gpio/gpio-mvebu.c | 18 +++++++++++++-----
> >  1 file changed, 13 insertions(+), 5 deletions(-)
> >
> > diff --git a/drivers/gpio/gpio-mvebu.c b/drivers/gpio/gpio-mvebu.c
> > index a35958e7adf6..67497116ce27 100644
> > --- a/drivers/gpio/gpio-mvebu.c
> > +++ b/drivers/gpio/gpio-mvebu.c
> > @@ -1112,6 +1112,13 @@ static int mvebu_gpio_probe_syscon(struct platform_device *pdev,
> >         return 0;
> >  }
> >
> > +static void mvebu_gpio_remove_irq_domain(void *data)
> > +{
> > +       struct irq_domain *domain = data;
> > +
> > +       irq_domain_remove(domain);
> 
> The from/to void * doesn't need an explicit casting in C. This can be
> a one liner
> 
> static void mvebu_gpio_remove_irq_domain(void *domain)
> {
>       irq_domain_remove(domain);
> }

I slightly prefer Bartosz's version, but wouldn't get sleepless nights
from that one.

Reviewed-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>

for whatever variant you pick.

Best regards and thanks for acting on my report,
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | https://www.pengutronix.de/ |

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