linux-kernel - Re: [PATCH 2/2] i2c: s3c2410: Check clk_prepare

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Date:	Wed, 20 Apr 2016 11:02:11 +0200
From:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
To:	Javier Martinez Canillas <javier@....samsung.com>,
	linux-kernel@...r.kernel.org
Cc:	linux-samsung-soc@...r.kernel.org,
	Wolfram Sang <wsa@...-dreams.de>,
	Kukjin Kim <kgene@...nel.org>, linux-i2c@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 2/2] i2c: s3c2410: Check clk_prepare_enable() return value

On 04/19/2016 10:10 PM, Javier Martinez Canillas wrote:
> The clk_prepare_enable() function can fail so check the return
> value and propagate the error in case of a failure.
> 
> Signed-off-by: Javier Martinez Canillas <javier@....samsung.com>
> 
> ---
> 
>  drivers/i2c/busses/i2c-s3c2410.c | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/i2c/busses/i2c-s3c2410.c b/drivers/i2c/busses/i2c-s3c2410.c
> index 4b873fe9a75b..cb40a3af46e7 100644
> --- a/drivers/i2c/busses/i2c-s3c2410.c
> +++ b/drivers/i2c/busses/i2c-s3c2410.c
> @@ -1196,7 +1196,12 @@ static int s3c24xx_i2c_probe(struct platform_device *pdev)
>  
>  	/* initialise the i2c controller */
>  
> -	clk_prepare_enable(i2c->clk);
> +	ret = clk_prepare_enable(i2c->clk);
> +	if (ret) {
> +		dev_err(&pdev->dev, "I2C clock enable failed (%d)\n", ret);

Just: "I2C clock enable failed\n"
The probe error code will be printed anyway.

Best regards,
Krzysztof