linux-kernel - Re: [PATCH v2 18/18] iio: magnetometer: iio-mux: Simplify with dev_err

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Message-ID: <325481bb-64b7-b063-f210-65d167888ca7@axentia.se>
Date:   Thu, 27 Aug 2020 23:52:48 +0200
From:   Peter Rosin <peda@...ntia.se>
To:     Krzysztof Kozlowski <krzk@...nel.org>,
        Jonathan Cameron <jic23@...nel.org>,
        Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Kukjin Kim <kgene@...nel.org>,
        Michael Hennerich <Michael.Hennerich@...log.com>,
        Kevin Hilman <khilman@...libre.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Marek Vasut <marek.vasut@...il.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        Beniamin Bia <beniamin.bia@...log.com>,
        Tomasz Duszynski <tomasz.duszynski@...akon.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org,
        linux-amlogic@...ts.infradead.org,
        linux-stm32@...md-mailman.stormreply.com
Subject: Re: [PATCH v2 18/18] iio: magnetometer: iio-mux: Simplify with
 dev_err_probe()

Hi!

Wrong subject. Made me overlook it on the first pass...

On 2020-08-27 21:26, Krzysztof Kozlowski wrote:
> Common pattern of handling deferred probe can be simplified with
> dev_err_probe().  Less code and also it prints the error value.
> 
> Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>
> ---
>  drivers/iio/multiplexer/iio-mux.c | 7 ++-----
>  1 file changed, 2 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/iio/multiplexer/iio-mux.c b/drivers/iio/multiplexer/iio-mux.c
> index 6910218fdb00..d219d4a86657 100644
> --- a/drivers/iio/multiplexer/iio-mux.c
> +++ b/drivers/iio/multiplexer/iio-mux.c
> @@ -354,11 +354,8 @@ static int mux_probe(struct platform_device *pdev)
>  		return -ENODEV;
>  
>  	parent = devm_iio_channel_get(dev, "parent");
> -	if (IS_ERR(parent)) {
> -		if (PTR_ERR(parent) != -EPROBE_DEFER)
> -			dev_err(dev, "failed to get parent channel\n");
> -		return PTR_ERR(parent);
> -	}
> +	if (IS_ERR(parent))
> +		return dev_err_probe(dev, PTR_ERR(parent), "failed to get parent channel\n");

As per the comment for 9/18, I'm not a fan of the long line here...

Cheers,
Peter

>  
>  	sizeof_ext_info = iio_get_channel_ext_info_count(parent);
>  	if (sizeof_ext_info) {
>