Re: [PATCH v2] iio: adc: stm32: Simplify with dev_err_probe()

From: Krzysztof Kozlowski <krzk@kernel.org>
To: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Jonathan Cameron <jic23@kernel.org>,
	Hartmut Knaack <knaack.h@gmx.de>,
	Lars-Peter Clausen <lars@metafoo.de>,
	Peter Meerwald-Stadler <pmeerw@pmeerw.net>,
	Maxime Coquelin <mcoquelin.stm32@gmail.com>,
	Alexandre Torgue <alexandre.torgue@st.com>,
	Fabrice Gasnier <fabrice.gasnier@st.com>,
	Etienne Carriere <etienne.carriere@st.com>,
	Alexandru Ardelean <alexandru.ardelean@analog.com>,
	linux-iio <linux-iio@vger.kernel.org>,
	linux-stm32@st-md-mailman.stormreply.com,
	linux-arm Mailing List <linux-arm-kernel@lists.infradead.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2] iio: adc: stm32: Simplify with dev_err_probe()
Date: Thu, 27 Aug 2020 21:06:52 +0200	[thread overview]
Message-ID: <20200827190652.GD6196@kozik-lap> (raw)
In-Reply-To: <CAHp75Vf3s0+RrHnBoO4y4+t4Egth4uyYwtO5iPt9DbLJcunL6g@mail.gmail.com>

On Thu, Aug 27, 2020 at 11:27:12AM +0300, Andy Shevchenko wrote:
> On Wed, Aug 26, 2020 at 7:19 PM Krzysztof Kozlowski <krzk@kernel.org> wrote:
> >
> > Common pattern of handling deferred probe can be simplified with
> > dev_err_probe().  Less code and also it prints the error value.
> 
> 
> 
> 
> 
> 
> >         priv->aclk = devm_clk_get(&pdev->dev, "adc");
> >         if (IS_ERR(priv->aclk)) {
> >                 ret = PTR_ERR(priv->aclk);
> > -               if (ret != -ENOENT) {
> > -                       if (ret != -EPROBE_DEFER)
> > -                               dev_err(&pdev->dev, "Can't get 'adc' clock\n");
> > -                       return ret;
> > -               }
> > +               if (ret != -ENOENT)
> > +                       return dev_err_probe(&pdev->dev, ret, "Can't get 'adc' clock\n");
> > +
> >                 priv->aclk = NULL;
> >         }
> >
> >         priv->bclk = devm_clk_get(&pdev->dev, "bus");
> >         if (IS_ERR(priv->bclk)) {
> >                 ret = PTR_ERR(priv->bclk);
> > -               if (ret != -ENOENT) {
> > -                       if (ret != -EPROBE_DEFER)
> > -                               dev_err(&pdev->dev, "Can't get 'bus' clock\n");
> > -                       return ret;
> > -               }
> > +               if (ret != -ENOENT)
> > +                       return dev_err_probe(&pdev->dev, ret, "Can't get 'bus' clock\n");
> > +
> >                 priv->bclk = NULL;
> >         }
> 
> Again, devm_clk_get_optional() and even, if it exists,
> devm_clk_bulk_get_optional().

Sure.

> 
> Please, revisit all patches on this topic.

I'll check them.

Best regards,
Krzysztof