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

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Date:   Thu, 10 Mar 2022 11:37:06 +0800
From:   Chen-Yu Tsai <wenst@...omium.org>
To:     Joe Perches <joe@...ches.com>
Cc:     Sean Wang <sean.wang@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        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 Thu, Mar 10, 2022 at 4:01 AM Joe Perches <joe@...ches.com> wrote:
>
> 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.

Judging from the commit history, I suspect there might have been plans
for using this in another module?

I can do a patch to make it static until that ever happens.

> 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.

Ack. But we could just leave it be.


Regards
ChenYu

> > 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;
> >  }
>
>