linux-kernel - Re: [PATCH] hwrng: imx-rngc

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Message-ID: <20230705071431.7487e285@drumknott>
Date:   Wed, 5 Jul 2023 07:14:31 +0200
From:   Rouven Czerwinski <rcz@...gutronix.de>
To:     Martin Kaiser <martin@...ser.cx>
Cc:     Herbert Xu <herbert@...dor.apana.org.au>,
        linux-crypto@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] hwrng: imx-rngc - use dev_err_probe

On Tue,  4 Jul 2023 19:06:44 +0200
Martin Kaiser <martin@...ser.cx> wrote:

> Simplify the code by calling dev_err_probe instead of dev_err and
> return.
> 
> While at it, use the same device for all error messages.
> 
> Signed-off-by: Martin Kaiser <martin@...ser.cx>

Reviewed-by: Rouven Czerwinski <r.czerwinskis@...gutronix.de>

> ---
>  drivers/char/hw_random/imx-rngc.c | 24 ++++++++----------------
>  1 file changed, 8 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/char/hw_random/imx-rngc.c
> b/drivers/char/hw_random/imx-rngc.c index bf07f17f78c8..e4b385b01b11
> 100644 --- a/drivers/char/hw_random/imx-rngc.c
> +++ b/drivers/char/hw_random/imx-rngc.c
> @@ -239,10 +239,8 @@ static int __init imx_rngc_probe(struct
> platform_device *pdev) return PTR_ERR(rngc->base);
>  
>  	rngc->clk = devm_clk_get_enabled(&pdev->dev, NULL);
> -	if (IS_ERR(rngc->clk)) {
> -		dev_err(&pdev->dev, "Can not get rng_clk\n");
> -		return PTR_ERR(rngc->clk);
> -	}
> +	if (IS_ERR(rngc->clk))
> +		return dev_err_probe(&pdev->dev, PTR_ERR(rngc->clk),
> "Cannot get rng_clk\n"); 
>  	irq = platform_get_irq(pdev, 0);
>  	if (irq < 0)
> @@ -272,24 +270,18 @@ static int __init imx_rngc_probe(struct
> platform_device *pdev) 
>  	ret = devm_request_irq(&pdev->dev,
>  			irq, imx_rngc_irq, 0, pdev->name, (void
> *)rngc);
> -	if (ret) {
> -		dev_err(rngc->dev, "Can't get interrupt working.\n");
> -		return ret;
> -	}
> +	if (ret)
> +		return dev_err_probe(&pdev->dev, ret, "Can't get
> interrupt working.\n"); 
>  	if (self_test) {
>  		ret = imx_rngc_self_test(rngc);
> -		if (ret) {
> -			dev_err(rngc->dev, "self test failed\n");
> -			return ret;
> -		}
> +		if (ret)
> +			return dev_err_probe(&pdev->dev, ret, "self
> test failed\n"); }
>  
>  	ret = devm_hwrng_register(&pdev->dev, &rngc->rng);
> -	if (ret) {
> -		dev_err(&pdev->dev, "hwrng registration failed\n");
> -		return ret;
> -	}
> +	if (ret)
> +		return dev_err_probe(&pdev->dev, ret, "hwrng
> registration failed\n"); 
>  	dev_info(&pdev->dev,
>  		"Freescale RNG%c registered (HW revision %d.%02d)\n",