linux-kernel - Re: [PATCH] Input: cyttsp - Make use of the helper function dev_err

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Message-ID: <20210917013525.GA17348@LAPTOP-UKSR4ENP.internal.baidu.com>
Date:   Fri, 17 Sep 2021 09:35:25 +0800
From:   Cai Huoqing <caihuoqing@...du.com>
To:     Linus Walleij <linus.walleij@...aro.org>
CC:     Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Linux Input <linux-input@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Input: cyttsp - Make use of the helper function
 dev_err_probe()

Hi
thanks for your feedback.

On 17 9月 21 00:30:32, Linus Walleij wrote:
> Hi Cai,
> 
> On Thu, Sep 16, 2021 at 5:32 PM Cai Huoqing <caihuoqing@...du.com> wrote:
> 
> >         if (IS_ERR(ts->reset_gpio)) {
> >                 error = PTR_ERR(ts->reset_gpio);
> > -               dev_err(dev, "Failed to request reset gpio, error %d\n", error);
> > +               dev_err_probe(dev, error, "Failed to request reset gpio\n");
> >                 return ERR_PTR(error);
> 
> In this case you're supposed to do
> 
> return dev_err_probe(dev, error, "Failed to request reset gpio\n");
the probe function is defined:
"struct cyttsp *cyttsp_probe("

so it is required to return a PTR:cyttsp *.
Thanks
Cai

> 
> Yours,
> Linus Walleij