linux-kernel - Re: [PATCH -next] drm: omapdrm: dss: simplify the return expression of hdmi_init_pll

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Date:   Mon, 21 Sep 2020 16:39:59 +0300
From:   Tomi Valkeinen <tomi.valkeinen@...com>
To:     Qinglang Miao <miaoqinglang@...wei.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>
CC:     <dri-devel@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH -next] drm: omapdrm: dss: simplify the return expression
 of hdmi_init_pll_data

Hi,

On 21/09/2020 16:10, Qinglang Miao wrote:
> Simplify the return expression.
> 
> Signed-off-by: Qinglang Miao <miaoqinglang@...wei.com>
> ---
>  drivers/gpu/drm/omapdrm/dss/hdmi_pll.c | 7 +------
>  1 file changed, 1 insertion(+), 6 deletions(-)
> 
> diff --git a/drivers/gpu/drm/omapdrm/dss/hdmi_pll.c b/drivers/gpu/drm/omapdrm/dss/hdmi_pll.c
> index cf2b000f3..c3e85b636 100644
> --- a/drivers/gpu/drm/omapdrm/dss/hdmi_pll.c
> +++ b/drivers/gpu/drm/omapdrm/dss/hdmi_pll.c
> @@ -131,7 +131,6 @@ static int hdmi_init_pll_data(struct dss_device *dss,
>  {
>  	struct dss_pll *pll = &hpll->pll;
>  	struct clk *clk;
> -	int r;
>  
>  	clk = devm_clk_get(&pdev->dev, "sys_clk");
>  	if (IS_ERR(clk)) {
> @@ -151,11 +150,7 @@ static int hdmi_init_pll_data(struct dss_device *dss,
>  
>  	pll->ops = &hdmi_pll_ops;
>  
> -	r = dss_pll_register(dss, pll);
> -	if (r)
> -		return r;
> -
> -	return 0;
> +	return dss_pll_register(dss, pll);
>  }
>  
>  int hdmi_pll_init(struct dss_device *dss, struct platform_device *pdev,
> 

I like it more when there's a return 0 at the end of the function, especially in functions where
there are multiple cases of if(...) return r. It's more easily readable, at least to my eyes.

 Tomi

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