linux-kernel - Re: [PATCH 1/3] drivers/base: move device

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Message-ID: <76851595.dP8mLy4DGX@aspire.rjw.lan>
Date:   Fri, 14 Sep 2018 11:07:57 +0200
From:   "Rafael J. Wysocki" <rjw@...ysocki.net>
To:     Pingfan Liu <kernelfans@...il.com>
Cc:     linux-pm@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] drivers/base: move device_shutdown() to base/power

On Monday, August 20, 2018 11:18:35 AM CEST Pingfan Liu wrote:
> Consider the shutdown as a system state transition, i.e. something like
> suspend, hibernate, hence move it under the base/power. (This is a first
> step to unify the duplicate code logic on devices_kset and dpm_list.)

I don't really think that device_shutodwn() belongs in base/power/.

Moving it to a separate file sounds like a good idea, but let that file
reside in base/ proper.

Then, I would separate the dpm_list definition, locking etc out of
base/power/, move it to the new file containing device_shutdown() and
make the code in base/power/ refer to it (you may want to move the list
entry list head from dev_pm_info to struct device directly while at that
too).

Then, it should be straightforward enough to switch device_shutdown() over to
using it.

Thanks,
Rafael