linux-kernel - Re: [PATCH v2] driver core: platform: Propagate error from insert

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Date:   Thu, 4 Apr 2019 10:26:08 +0200
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] driver core: platform: Propagate error from insert_resource()

On Thu, Apr 4, 2019 at 10:12 AM Andy Shevchenko
<andriy.shevchenko@...ux.intel.com> wrote:
>
> Since insert_resource() might return an error we don't need
> to shadow its error code and would safely propagate to the user.
>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

> ---
> - move an assignment to the separate line inside first branch (Rafael)
>
>  drivers/base/platform.c | 10 ++++++----
>  1 file changed, 6 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/base/platform.c b/drivers/base/platform.c
> index dab0a5abc391..9cf9e2af9efd 100644
> --- a/drivers/base/platform.c
> +++ b/drivers/base/platform.c
> @@ -438,10 +438,12 @@ int platform_device_add(struct platform_device *pdev)
>                                 p = &ioport_resource;
>                 }
>
> -               if (p && insert_resource(p, r)) {
> -                       dev_err(&pdev->dev, "failed to claim resource %d: %pR\n", i, r);
> -                       ret = -EBUSY;
> -                       goto failed;
> +               if (p) {
> +                       ret = insert_resource(p, r);
> +                       if (ret) {
> +                               dev_err(&pdev->dev, "failed to claim resource %d: %pR\n", i, r);
> +                               goto failed;
> +                       }
>                 }
>         }
>
> --
> 2.20.1
>