linux-kernel - Re: [PATCH] PM: runtime: Replace pm_runtime_callbacks

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Date:   Fri, 29 May 2020 00:33:19 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     "Rafael J. Wysocki" <rjw@...ysocki.net>
Cc:     Linux PM <linux-pm@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>
Subject: Re: [PATCH] PM: runtime: Replace pm_runtime_callbacks_present()

On Thu, 28 May 2020 at 16:45, Rafael J. Wysocki <rjw@...ysocki.net> wrote:
>
> From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
>
> The name of pm_runtime_callbacks_present() is confusing, because
> it suggests that the device has PM-runtime callbacks if 'true' is
> returned by that function, but in fact that may not be the case,
> so replace it with pm_runtime_has_no_callbacks() which is not
> ambiguous.
>
> No functional impact.
>
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

Makes sense to me, feel free to add:

Reviewed-by: Ulf Hansson <ulf.hansson@...aro.org>

Kind regards
Uffe

> ---
>  drivers/base/power/sysfs.c |    4 ++--
>  include/linux/pm_runtime.h |    4 ++--
>  2 files changed, 4 insertions(+), 4 deletions(-)
>
> Index: linux-pm/include/linux/pm_runtime.h
> ===================================================================
> --- linux-pm.orig/include/linux/pm_runtime.h
> +++ linux-pm/include/linux/pm_runtime.h
> @@ -102,9 +102,9 @@ static inline bool pm_runtime_enabled(st
>         return !dev->power.disable_depth;
>  }
>
> -static inline bool pm_runtime_callbacks_present(struct device *dev)
> +static inline bool pm_runtime_has_no_callbacks(struct device *dev)
>  {
> -       return !dev->power.no_callbacks;
> +       return dev->power.no_callbacks;
>  }
>
>  static inline void pm_runtime_mark_last_busy(struct device *dev)
> Index: linux-pm/drivers/base/power/sysfs.c
> ===================================================================
> --- linux-pm.orig/drivers/base/power/sysfs.c
> +++ linux-pm/drivers/base/power/sysfs.c
> @@ -666,7 +666,7 @@ int dpm_sysfs_add(struct device *dev)
>         if (rc)
>                 return rc;
>
> -       if (pm_runtime_callbacks_present(dev)) {
> +       if (!pm_runtime_has_no_callbacks(dev)) {
>                 rc = sysfs_merge_group(&dev->kobj, &pm_runtime_attr_group);
>                 if (rc)
>                         goto err_out;
> @@ -709,7 +709,7 @@ int dpm_sysfs_change_owner(struct device
>         if (rc)
>                 return rc;
>
> -       if (pm_runtime_callbacks_present(dev)) {
> +       if (!pm_runtime_has_no_callbacks(dev)) {
>                 rc = sysfs_group_change_owner(
>                         &dev->kobj, &pm_runtime_attr_group, kuid, kgid);
>                 if (rc)
>
>
>