linux-kernel - Re: [PATCH v2 05/11] pinctrl: mediatek: paris: Drop extra newline in mtk_pctrl_show_one

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Date:   Wed, 09 Mar 2022 12:01:39 -0800
From:   Joe Perches <joe@...ches.com>
To:     Chen-Yu Tsai <wenst@...omium.org>,
        Sean Wang <sean.wang@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>
Cc:     linux-mediatek@...ts.infradead.org, linux-gpio@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Subject: Re: [PATCH v2 05/11] pinctrl: mediatek: paris: Drop extra newline
 in mtk_pctrl_show_one_pin()

On Tue, 2022-03-08 at 18:09 +0800, Chen-Yu Tsai wrote:
> The caller of mtk_pctrl_show_one_pin() is responsible for printing the
> full line. mtk_pctrl_show_one_pin(), called through mtk_pctrl_dbg_show(),
> should only produce a string containing the extra information the driver
> wants included.

Does this function have another caller?

It looks as if this function doesn't need to be EXPORT_SYMBOL_GPL
and could just be declared static in the file instead.

btw: using %1d is mostly senseless as a control, but has some
     documentary use as a value < 0 or >= 10 will be always be
     fully emitted anyway.

> diff --git a/drivers/pinctrl/mediatek/pinctrl-paris.c b/drivers/pinctrl/mediatek/pinctrl-paris.c
[]
> @@ -634,14 +634,10 @@ ssize_t mtk_pctrl_show_one_pin(struct mtk_pinctrl *hw,
>  			pullen,
>  			pullup);
>  
> -	if (r1 != -1) {
> -		len += scnprintf(buf + len, buf_len - len, " (%1d %1d)\n",
> -			r1, r0);
> -	} else if (rsel != -1) {
> -		len += scnprintf(buf + len, buf_len - len, " (%1d)\n", rsel);
> -	} else {
> -		len += scnprintf(buf + len, buf_len - len, "\n");
> -	}
> +	if (r1 != -1)
> +		len += scnprintf(buf + len, buf_len - len, " (%1d %1d)", r1, r0);
> +	else if (rsel != -1)
> +		len += scnprintf(buf + len, buf_len - len, " (%1d)", rsel);
>  
>  	return len;
>  }