linux-kernel - Re: [PATCH v4 3/3] driver core: add probe_err

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Date:   Thu, 20 Dec 2018 12:05:29 +0100
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Andrzej Hajda <a.hajda@...sung.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        javierm@...hat.com,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Russell King - ARM Linux <linux@...linux.org.uk>
Subject: Re: [PATCH v4 3/3] driver core: add probe_err_ptr helper

On Thu, Dec 20, 2018 at 11:23 AM Andrzej Hajda <a.hajda@...sung.com> wrote:
>
> probe_err is useful in multiple contexts where error is encoded in pointer.
> Adding helper performing conversion to error value should simplify code
> further.
>
> Signed-off-by: Andrzej Hajda <a.hajda@...sung.com>

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

> ---
>  include/linux/device.h | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/include/linux/device.h b/include/linux/device.h
> index 2d3a1cc6f5da..50632414c363 100644
> --- a/include/linux/device.h
> +++ b/include/linux/device.h
> @@ -1594,6 +1594,8 @@ do {                                                                      \
>  extern __printf(3, 4)
>  int probe_err(const struct device *dev, int err, const char *fmt, ...);
>
> +#define probe_err_ptr(dev, ptr, args...) probe_err(dev, PTR_ERR(ptr), args)
> +
>  /* Create alias, so I can be autoloaded. */
>  #define MODULE_ALIAS_CHARDEV(major,minor) \
>         MODULE_ALIAS("char-major-" __stringify(major) "-" __stringify(minor))
> --
> 2.17.1
>