linux-kernel - Re: [PATCH -next] gpio: sim: add missing fwnode_handle_put() in gpio_sim

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Message-ID: <CAMRc=Md7xfn5-XtbVs_sEWt7YtdzMF0eUCqUME4_W6Bxv4d84g@mail.gmail.com>
Date:   Tue, 21 Dec 2021 16:22:22 +0100
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Yang Yingliang <yangyingliang@...wei.com>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Linus Walleij <linus.walleij@...aro.org>
Subject: Re: [PATCH -next] gpio: sim: add missing fwnode_handle_put() in gpio_sim_probe()

On Tue, Dec 21, 2021 at 12:32 PM Yang Yingliang
<yangyingliang@...wei.com> wrote:
>
> Calling fwnode_handle_put() when break out of device_for_each_child_node(),
> or the device node reference will be leakd.
>
> Fixes: 83960fcf4818 ("gpio: sim: new testing module")
> Reported-by: Hulk Robot <hulkci@...wei.com>
> Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>
> ---
>  drivers/gpio/gpio-sim.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpio/gpio-sim.c b/drivers/gpio/gpio-sim.c
> index ef6145f51c8a..520ee923b516 100644
> --- a/drivers/gpio/gpio-sim.c
> +++ b/drivers/gpio/gpio-sim.c
> @@ -444,8 +444,10 @@ static int gpio_sim_probe(struct platform_device *pdev)
>
>         device_for_each_child_node(dev, swnode) {
>                 ret = gpio_sim_add_bank(swnode, dev);
> -               if (ret)
> +               if (ret) {
> +                       fwnode_handle_put(swnode);
>                         return ret;
> +               }
>         }
>
>         return 0;
> --
> 2.25.1
>

Applied, thanks!

Bart