linux-kernel - Re: [PATCH] drm/mediatek: remove unnecessary conversion to bool

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Message-ID: <e070b38f-fa77-5872-ea59-13098cebbe56@arm.com>
Date:   Fri, 12 Jun 2020 14:09:07 +0100
From:   Robin Murphy <robin.murphy@....com>
To:     Bernard Zhao <bernard@...o.com>,
        Chun-Kuang Hu <chunkuang.hu@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Matthias Brugger <matthias.bgg@...il.com>,
        dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     opensource.kernel@...o.com
Subject: Re: [PATCH] drm/mediatek: remove unnecessary conversion to bool

On 2020-06-12 13:40, Bernard Zhao wrote:
> In function mtk_dsi_clk_hs_state, remove unnecessary conversion
> to bool return, this change is to make the code a bit readable.
> 
> Signed-off-by: Bernard Zhao <bernard@...o.com>
> ---
>   drivers/gpu/drm/mediatek/mtk_dsi.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c
> index 270bf22c98fe..4491e64b3f06 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dsi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
> @@ -319,7 +319,7 @@ static bool mtk_dsi_clk_hs_state(struct mtk_dsi *dsi)
>   	u32 tmp_reg1;
>   
>   	tmp_reg1 = readl(dsi->regs + DSI_PHY_LCCON);
> -	return ((tmp_reg1 & LC_HS_TX_EN) == 1) ? true : false;
> +	return ((tmp_reg1 & LC_HS_TX_EN) == 1);

FWIW the "== 1" is also redundant, not to mention a little confusing - 
unless you go and look up the definition of LC_HS_TX_EN, it looks like 
this is doing something more than simply testing if a single bit is set.

Robin.

>   }
>   
>   static void mtk_dsi_clk_hs_mode(struct mtk_dsi *dsi, bool enter)
>