linux-kernel - Re: [PATCH 7/8] rtc: rework rtc_register

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Message-ID: <CAMpxmJXa8L0TaeENeYsypmgfkabdP8pH6H6iniwmy0KJs8w4Pg@mail.gmail.com>
Date:   Fri, 27 Nov 2020 10:23:23 +0100
From:   Bartosz Golaszewski <bgolaszewski@...libre.com>
To:     Lee Jones <lee.jones@...aro.org>
Cc:     Bartosz Golaszewski <brgl@...ev.pl>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        linux-rtc@...r.kernel.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 7/8] rtc: rework rtc_register_device() resource management

On Fri, Nov 27, 2020 at 10:16 AM Lee Jones <lee.jones@...aro.org> wrote:
>
>
>
> On Mon, 9 Nov 2020 at 16:34, Bartosz Golaszewski <brgl@...ev.pl> wrote:
>>
>> From: Bartosz Golaszewski <bgolaszewski@...libre.com>
>>
>> rtc_register_device() is a managed interface but it doesn't use devres
>> by itself - instead it marks an rtc_device as "registered" and the devres
>> callback for devm_rtc_allocate_device() takes care of resource release.
>>
>> This doesn't correspond with the design behind devres where managed
>> structures should not be aware of being managed. The correct solution
>> here is to register a separate devres callback for unregistering the
>> device.
>>
>> While at it: rename rtc_register_device() to devm_rtc_register_device()
>> and add it to the list of managed interfaces in devres.rst. This way we
>> can avoid any potential confusion of driver developers who may expect
>> there to exist a corresponding unregister function.
>>
>> Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
>> ---
>>  .../driver-api/driver-model/devres.rst        |  1 +
>>  arch/alpha/kernel/rtc.c                       |  2 +-
>>  drivers/mfd/menelaus.c                        |  2 +-
>
>
> This patch should have been sent to and Acked by MFD too.
>

Sorry Lee, I missed the fact that there were changes outside of
drivers/rtc/. Other than skipping the MFD maintainer - do you see
anything wrong in that bit?

Bartosz