Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Date:   Wed, 12 May 2021 18:13:12 +0200
From:   Alexandre Belloni <alexandre.belloni@bootlin.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Cc:     Edmundo Carmona Antoranz <eantoranz@gmail.com>,
        Christophe JAILLET <christophe.jaillet@wanadoo.fr>,
        cw00.choi@samsung.com, b.zolnierkie@samsung.com,
        a.zummo@towertech.it, linux-rtc@vger.kernel.org,
        linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: Re: [PATCH] rtc: max77686: Remove some dead code
Message-ID: <YJv+mMRcOuTJxLuk@piout.net>
References: <a6b23ee8d3ea78f62d3fda0b53aa273718f14c6d.1620452523.git.christophe.jaillet@wanadoo.fr>
 <CAOc6etaUPtJqoH9DBDE72nDW7s7iEZHnaJRpKx9zFow02WOZig@mail.gmail.com>
 <9f34ebcd-0c17-cd7f-eb08-52c6c3dc7b03@wanadoo.fr>
 <CAOc6etYwTvVPnoB3BQfuQEikvsCwSs9AqBWnLFrs9zQ0pJGp1A@mail.gmail.com>
 <YJhO0cEqpbJAdv7s@piout.net>
 <219efcc7-ca05-a7d1-5943-d34a42f0d49f@canonical.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <219efcc7-ca05-a7d1-5943-d34a42f0d49f@canonical.com>
Precedence: bulk

On 10/05/2021 08:20:52-0400, Krzysztof Kozlowski wrote:
> On 09/05/2021 17:06, Alexandre Belloni wrote:
> > On 08/05/2021 18:06:03-0600, Edmundo Carmona Antoranz wrote:
> >> On Sat, May 8, 2021 at 10:59 AM Christophe JAILLET
> >> <christophe.jaillet@wanadoo.fr> wrote:
> >>>
> >>>>
> >>>> Following the recent conversations, I think it might make sense to do
> >>>> dev_err(&pdev->dev, "Failed to register RTC device: %pe\n", info->rtc_dev);
> >>>>
> >>>> Is that right?
> >>>>
> >>>
> >>> Yes, it is right, but it should be done in another patch.
> >>>
> >>> Would you like to give it a try?
> >>>
> >> Sure, I'll have the patch ready to send it when I see yours on next.
> > 
> > Does it make sense to print anything at all? Who would use the output?
> > Is anyone actually going to read it?
> 
> If the RTC core does not print the message, it should be
> dev_err_probe().  However the first is recently preferred - RTC core
> should do it for all drivers.  I find such error messages useful - helps
> easily spotting regressions via dmesg -l err.
> 

The only error path that will not print a message by default (it is
dev_dbg) is when rtc-ops is NULL which I don't expect would regress
anyway.

A better way to remove the dead code would be to switch to
devm_rtc_allocate_device/devm_rtc_register_device. And even better would
be to take that opportunity to set range_min and range_max ;)

-- 
Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com