linux-kernel - Re: [PATCH] i2c: don't print error when adding adapter fails

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Message-ID: <32d25618-83f6-b876-07b0-adb988516173@roeck-us.net>
Date:	Tue, 9 Aug 2016 06:31:40 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	Wolfram Sang <wsa-dev@...g-engineering.com>,
	linux-kernel@...r.kernel.org
Cc:	linux-i2c@...r.kernel.org, Wolfram Sang <wsa@...-dreams.de>,
	linux-arm-kernel@...ts.infradead.org,
	adi-buildroot-devel@...ts.sourceforge.net,
	linuxppc-dev@...ts.ozlabs.org, linux-samsung-soc@...r.kernel.org,
	linux-amlogic@...ts.infradead.org, linux-omap@...r.kernel.org,
	linux-rockchip@...ts.infradead.org, kernel@...inux.com,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>
Subject: Re: [PATCH] i2c: don't print error when adding adapter fails

On 08/09/2016 04:36 AM, Wolfram Sang wrote:
> The core will do this for us now.
>
> Signed-off-by: Wolfram Sang <wsa-dev@...g-engineering.com>
> ---
[ ... ]

> diff --git a/drivers/i2c/busses/i2c-uniphier-f.c b/drivers/i2c/busses/i2c-uniphier-f.c
> index aeead0d27d1007..64318e69089439 100644
> --- a/drivers/i2c/busses/i2c-uniphier-f.c
> +++ b/drivers/i2c/busses/i2c-uniphier-f.c
> @@ -550,15 +550,10 @@ static int uniphier_fi2c_probe(struct platform_device *pdev)
>  	}
>
>  	ret = i2c_add_adapter(&priv->adap);
> -	if (ret) {
> -		dev_err(dev, "failed to add I2C adapter\n");
> -		goto err;
> -	}
> -
> -err:
>  	if (ret)
>  		clk_disable_unprepare(priv->clk);
>
> + err:

You sure about that one ? It leaves the clock enabled in some of the error paths.

>  	return ret;
>  }
>
> diff --git a/drivers/i2c/busses/i2c-uniphier.c b/drivers/i2c/busses/i2c-uniphier.c
> index 475a5eb514e215..94f64cccfdef08 100644
> --- a/drivers/i2c/busses/i2c-uniphier.c
> +++ b/drivers/i2c/busses/i2c-uniphier.c
> @@ -407,15 +407,10 @@ static int uniphier_i2c_probe(struct platform_device *pdev)
>  	}
>
>  	ret = i2c_add_adapter(&priv->adap);
> -	if (ret) {
> -		dev_err(dev, "failed to add I2C adapter\n");
> -		goto err;
> -	}
> -
> -err:
>  	if (ret)
>  		clk_disable_unprepare(priv->clk);
>
> + err:

Same as above.

Note: I dropped all individuals from Cc:; my mailer refused to accept the reply because there
were too many.

Guenter

>  	return ret;
>  }
>