linux-kernel - Re: [PATCH 4/6] pwm: sifive: Simplify with dev_err

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Message-ID: <mhng-452a4fec-be33-4b49-a904-edb4b4c81e0c@palmerdabbelt-glaptop1>
Date:   Wed, 26 Aug 2020 09:22:24 -0700 (PDT)
From:   Palmer Dabbelt <palmer@...belt.com>
To:     krzk@...nel.org
CC:     thierry.reding@...il.com, u.kleine-koenig@...gutronix.de,
        lee.jones@...aro.org, nsaenzjulienne@...e.de, f.fainelli@...il.com,
        rjui@...adcom.com, sbranden@...adcom.com,
        bcm-kernel-feedback-list@...adcom.com, paul@...pouillou.net,
        heiko@...ech.de, Paul Walmsley <paul.walmsley@...ive.com>,
        orsonzhai@...il.com, baolin.wang7@...il.com, zhang.lyra@...il.com,
        mripard@...nel.org, wens@...e.org, linux-pwm@...r.kernel.org,
        linux-rpi-kernel@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-rockchip@...ts.infradead.org,
        linux-riscv@...ts.infradead.org, krzk@...nel.org
Subject:     Re: [PATCH 4/6] pwm: sifive: Simplify with dev_err_probe()

On Wed, 26 Aug 2020 07:47:45 PDT (-0700), krzk@...nel.org 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/pwm/pwm-sifive.c | 8 +++-----
>  1 file changed, 3 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/pwm/pwm-sifive.c b/drivers/pwm/pwm-sifive.c
> index 62de0bb85921..2485fbaaead2 100644
> --- a/drivers/pwm/pwm-sifive.c
> +++ b/drivers/pwm/pwm-sifive.c
> @@ -254,11 +254,9 @@ static int pwm_sifive_probe(struct platform_device *pdev)
>  		return PTR_ERR(ddata->regs);
>
>  	ddata->clk = devm_clk_get(dev, NULL);
> -	if (IS_ERR(ddata->clk)) {
> -		if (PTR_ERR(ddata->clk) != -EPROBE_DEFER)
> -			dev_err(dev, "Unable to find controller clock\n");
> -		return PTR_ERR(ddata->clk);
> -	}
> +	if (IS_ERR(ddata->clk))
> +		return dev_err_probe(dev, PTR_ERR(ddata->clk),
> +				     "Unable to find controller clock\n");
>
>  	ret = clk_prepare_enable(ddata->clk);
>  	if (ret) {

Acked-by: Palmer Dabbelt <palmerdabbelt@...gle.com>