linux-kernel - Re: [PATCH -next 1/2] pinctrl: ocelot: add missing destroy_workqueue() in error path in ocelot_pinctrl

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Date:   Fri, 16 Sep 2022 21:01:14 +0200
From:   Horatiu Vultur <horatiu.vultur@...rochip.com>
To:     Yang Yingliang <yangyingliang@...wei.com>
CC:     <linux-gpio@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linus.walleij@...aro.org>, <p.zabel@...gutronix.de>
Subject: Re: [PATCH -next 1/2] pinctrl: ocelot: add missing
 destroy_workqueue() in error path in ocelot_pinctrl_probe()

The 09/15/2022 23:14, Yang Yingliang wrote:

Hi Yang,

> 
> Add the missing destroy_workqueue() before return from ocelot_pinctrl_probe()
> in error path.
> 
> Fixes: c297561bc98a ("pinctrl: ocelot: Fix interrupt controller")
> Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>
> ---
>  drivers/pinctrl/pinctrl-ocelot.c | 25 +++++++++++++++++--------
>  1 file changed, 17 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/pinctrl/pinctrl-ocelot.c b/drivers/pinctrl/pinctrl-ocelot.c
> index d9c0184c077f..83703a3d291c 100644
> --- a/drivers/pinctrl/pinctrl-ocelot.c
> +++ b/drivers/pinctrl/pinctrl-ocelot.c
> @@ -2072,15 +2072,19 @@ static int ocelot_pinctrl_probe(struct platform_device *pdev)
>         info->pincfg_data = &data->pincfg_data;
> 
>         reset = devm_reset_control_get_optional_shared(dev, "switch");
> -       if (IS_ERR(reset))
> -               return dev_err_probe(dev, PTR_ERR(reset),
> -                                    "Failed to get reset\n");
> +       if (IS_ERR(reset)) {
> +               ret = dev_err_probe(dev, PTR_ERR(reset),
> +                                   "Failed to get reset\n");
> +               goto err_out;
> +       }
>         reset_control_reset(reset);
> 
>         base = devm_ioremap_resource(dev,
>                         platform_get_resource(pdev, IORESOURCE_MEM, 0));
> -       if (IS_ERR(base))
> -               return PTR_ERR(base);
> +       if (IS_ERR(base)) {
> +               ret = PTR_ERR(base);
> +               goto err_out;
> +       }
> 
>         info->stride = 1 + (info->desc->npins - 1) / 32;
> 
> @@ -2089,7 +2093,8 @@ static int ocelot_pinctrl_probe(struct platform_device *pdev)
>         info->map = devm_regmap_init_mmio(dev, base, &regmap_config);
>         if (IS_ERR(info->map)) {
>                 dev_err(dev, "Failed to create regmap\n");
> -               return PTR_ERR(info->map);
> +               ret = PTR_ERR(info->map);
> +               goto err_out;
>         }
>         dev_set_drvdata(dev, info);
>         info->dev = dev;
> @@ -2105,15 +2110,19 @@ static int ocelot_pinctrl_probe(struct platform_device *pdev)
> 
>         ret = ocelot_pinctrl_register(pdev, info);
>         if (ret)
> -               return ret;
> +               goto err_out;

Wouldn't be better actually to add the allocation of the workqueue here?
In this way, you will not need all the previous changes.

> 
>         ret = ocelot_gpiochip_register(pdev, info);
>         if (ret)
> -               return ret;
> +               goto err_out;
> 
>         dev_info(dev, "driver registered\n");
> 
>         return 0;
> +
> +err_out:
> +       destroy_workqueue(info->wq);
> +       return ret;
>  }
> 
>  static int ocelot_pinctrl_remove(struct platform_device *pdev)
> --
> 2.25.1
> 

-- 
/Horatiu