linux-kernel - Re: [PATCH] rtc: s5m: use devm_i2c_new_dummy

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Date:   Wed, 6 Jan 2021 07:34:39 +0100
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Krzysztof Kozlowski <krzk@...nel.org>
Cc:     Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-samsung-soc@...r.kernel.org, linux-rtc@...r.kernel.org,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: Re: [PATCH] rtc: s5m: use devm_i2c_new_dummy_device()

On Tue, Jan 5, 2021 at 5:50 PM Krzysztof Kozlowski <krzk@...nel.org> wrote:
>
> On Tue, Jan 05, 2021 at 02:44:24PM +0100, Bartosz Golaszewski wrote:
> > From: Bartosz Golaszewski <bgolaszewski@...libre.com>
> >
> > Use the managed variant of i2c_new_dummy_device() to shrink code and
> > remove the goto label.
> >
> > Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
> > ---
> >  drivers/rtc/rtc-s5m.c | 24 ++++++++----------------
> >  1 file changed, 8 insertions(+), 16 deletions(-)
> >
> > diff --git a/drivers/rtc/rtc-s5m.c b/drivers/rtc/rtc-s5m.c
> > index eb9dde4095a9..3432c6213b4c 100644
> > --- a/drivers/rtc/rtc-s5m.c
> > +++ b/drivers/rtc/rtc-s5m.c
> > @@ -760,7 +760,8 @@ static int s5m_rtc_probe(struct platform_device *pdev)
> >               return -ENODEV;
> >       }
> >
> > -     info->i2c = i2c_new_dummy_device(s5m87xx->i2c->adapter, RTC_I2C_ADDR);
> > +     info->i2c = devm_i2c_new_dummy_device(&pdev->dev, s5m87xx->i2c->adapter,
> > +                                           RTC_I2C_ADDR);
> >       if (IS_ERR(info->i2c)) {
> >               dev_err(&pdev->dev, "Failed to allocate I2C for RTC\n");
> >               return PTR_ERR(info->i2c);
> > @@ -768,10 +769,9 @@ static int s5m_rtc_probe(struct platform_device *pdev)
> >
> >       info->regmap = devm_regmap_init_i2c(info->i2c, regmap_cfg);
> >       if (IS_ERR(info->regmap)) {
> > -             ret = PTR_ERR(info->regmap);
> >               dev_err(&pdev->dev, "Failed to allocate RTC register map: %d\n",
> > -                             ret);
> > -             goto err;
> > +                     ret);
> > +             return PTR_ERR(info->regmap);
> >       }
> >
> >       info->dev = &pdev->dev;
> > @@ -781,10 +781,9 @@ static int s5m_rtc_probe(struct platform_device *pdev)
> >       if (s5m87xx->irq_data) {
> >               info->irq = regmap_irq_get_virq(s5m87xx->irq_data, alarm_irq);
> >               if (info->irq <= 0) {
> > -                     ret = -EINVAL;
> >                       dev_err(&pdev->dev, "Failed to get virtual IRQ %d\n",
> >                               alarm_irq);
> > -                     goto err;
> > +                     return -EINVAL;
> >               }
> >       }
> >
> > @@ -797,10 +796,8 @@ static int s5m_rtc_probe(struct platform_device *pdev)
> >       info->rtc_dev = devm_rtc_device_register(&pdev->dev, "s5m-rtc",
> >                                                &s5m_rtc_ops, THIS_MODULE);
> >
> > -     if (IS_ERR(info->rtc_dev)) {
> > -             ret = PTR_ERR(info->rtc_dev);
> > -             goto err;
> > -     }
> > +     if (IS_ERR(info->rtc_dev))
> > +             return PTR_ERR(info->rtc_dev);
> >
> >       if (!info->irq) {
> >               dev_info(&pdev->dev, "Alarm IRQ not available\n");
> > @@ -813,15 +810,10 @@ static int s5m_rtc_probe(struct platform_device *pdev)
> >       if (ret < 0) {
> >               dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n",
> >                       info->irq, ret);
> > -             goto err;
> > +             return ret;
> >       }
> >
> >       return 0;
> > -
> > -err:
> > -     i2c_unregister_device(info->i2c);
> > -
> > -     return ret;
> >  }
> >
> >  static int s5m_rtc_remove(struct platform_device *pdev)
>
> Unbind should OOPS now.
>

Yes... Yes it should. And it won't in v2. :)

Thanks!
Bart