linux-kernel - Re: [PATCH 2/5] leds: lm3692x: Don't overwrite return value in error path

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Message-ID: <20190919105707.GB29939@amd>
Date:   Thu, 19 Sep 2019 12:57:07 +0200
From:   Pavel Machek <pavel@....cz>
To:     Guido Günther <agx@...xcpu.org>
Cc:     Jacek Anaszewski <jacek.anaszewski@...il.com>,
        Dan Murphy <dmurphy@...com>, linux-leds@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/5] leds: lm3692x: Don't overwrite return value in error
 path

On Tue 2019-09-17 19:19:55, Guido Günther wrote:
> The driver currently reports successful initialization on every failure
> as long as it's able to power off the regulator. Don't check the return
> value of regulator_disable to avoid that.
> 
> Signed-off-by: Guido Günther <agx@...xcpu.org>
> ---
>  drivers/leds/leds-lm3692x.c | 9 +++------
>  1 file changed, 3 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/leds/leds-lm3692x.c b/drivers/leds/leds-lm3692x.c
> index 487228c2bed2..f394669ad8f2 100644
> --- a/drivers/leds/leds-lm3692x.c
> +++ b/drivers/leds/leds-lm3692x.c
> @@ -312,15 +312,12 @@ static int lm3692x_init(struct lm3692x_led *led)
>  	if (led->enable_gpio)
>  		gpiod_direction_output(led->enable_gpio, 0);
>  
> -	if (led->regulator) {
> -		ret = regulator_disable(led->regulator);
> -		if (ret)
> -			dev_err(&led->client->dev,
> -				"Failed to disable regulator\n");
> -	}
> +	if (led->regulator)
> +		regulator_disable(led->regulator);
>  
>  	return ret;

Overwriting return value is bad, but we should still print some kind
of error message.

Best regards,
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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