linux-kernel - Re: [PATCH v2] PM: Add dev_wakeup

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Date:   Mon, 23 Nov 2020 18:36:42 +0100
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     patrice.chotard@...com
Cc:     "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Linux PM <linux-pm@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Kevin Hilman <khilman@...nel.org>,
        Erwan Le Ray <erwan.leray@...com>,
        Alexandre TORGUE <alexandre.torgue@...com>,
        Fabrice Gasnier <fabrice.gasnier@...com>,
        Pierre-Yves MORDRET <pierre-yves.mordret@...com>,
        amelie.delaunay@...com, alain.volmat@...com
Subject: Re: [PATCH v2] PM: Add dev_wakeup_path() helper

On Thu, Nov 19, 2020 at 8:26 AM <patrice.chotard@...com> wrote:
>
> From: Patrice Chotard <patrice.chotard@...com>
>
> Add dev_wakeup_path() helper to avoid to spread
> dev->power.wakeup_path test in drivers.
>
> Signed-off-by: Patrice Chotard <patrice.chotard@...com>
> Reviewed-by: Ulf Hansson <ulf.hansson@...aro.org>
> ---
>
> Changes from v1:
>   - Fold the 4 v1 patches into one
>   - Add Ulf's Reviewed-by
>
>  drivers/base/power/domain.c      |  4 ++--
>  drivers/base/power/main.c        |  4 ++--
>  drivers/i2c/busses/i2c-stm32f7.c |  4 ++--
>  include/linux/pm_wakeup.h        | 10 ++++++++++
>  4 files changed, 16 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
> index 743268996336..e0894ef8457c 100644
> --- a/drivers/base/power/domain.c
> +++ b/drivers/base/power/domain.c
> @@ -1142,7 +1142,7 @@ static int genpd_finish_suspend(struct device *dev, bool poweroff)
>         if (ret)
>                 return ret;
>
> -       if (dev->power.wakeup_path && genpd_is_active_wakeup(genpd))
> +       if (device_wakeup_path(dev) && genpd_is_active_wakeup(genpd))
>                 return 0;
>
>         if (genpd->dev_ops.stop && genpd->dev_ops.start &&
> @@ -1196,7 +1196,7 @@ static int genpd_resume_noirq(struct device *dev)
>         if (IS_ERR(genpd))
>                 return -EINVAL;
>
> -       if (dev->power.wakeup_path && genpd_is_active_wakeup(genpd))
> +       if (device_wakeup_path(dev) && genpd_is_active_wakeup(genpd))
>                 return pm_generic_resume_noirq(dev);
>
>         genpd_lock(genpd);
> diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
> index c7ac49042cee..921c5b2ec30a 100644
> --- a/drivers/base/power/main.c
> +++ b/drivers/base/power/main.c
> @@ -1359,7 +1359,7 @@ static void dpm_propagate_wakeup_to_parent(struct device *dev)
>
>         spin_lock_irq(&parent->power.lock);
>
> -       if (dev->power.wakeup_path && !parent->power.ignore_children)
> +       if (device_wakeup_path(dev) && !parent->power.ignore_children)
>                 parent->power.wakeup_path = true;
>
>         spin_unlock_irq(&parent->power.lock);
> @@ -1627,7 +1627,7 @@ static int __device_suspend(struct device *dev, pm_message_t state, bool async)
>                 goto Complete;
>
>         /* Avoid direct_complete to let wakeup_path propagate. */
> -       if (device_may_wakeup(dev) || dev->power.wakeup_path)
> +       if (device_may_wakeup(dev) || device_wakeup_path(dev))
>                 dev->power.direct_complete = false;
>
>         if (dev->power.direct_complete) {
> diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c
> index f41f51a176a1..9aa8e65b511e 100644
> --- a/drivers/i2c/busses/i2c-stm32f7.c
> +++ b/drivers/i2c/busses/i2c-stm32f7.c
> @@ -2322,7 +2322,7 @@ static int stm32f7_i2c_suspend(struct device *dev)
>
>         i2c_mark_adapter_suspended(&i2c_dev->adap);
>
> -       if (!device_may_wakeup(dev) && !dev->power.wakeup_path) {
> +       if (!device_may_wakeup(dev) && !device_wakeup_path(dev)) {
>                 ret = stm32f7_i2c_regs_backup(i2c_dev);
>                 if (ret < 0) {
>                         i2c_mark_adapter_resumed(&i2c_dev->adap);
> @@ -2341,7 +2341,7 @@ static int stm32f7_i2c_resume(struct device *dev)
>         struct stm32f7_i2c_dev *i2c_dev = dev_get_drvdata(dev);
>         int ret;
>
> -       if (!device_may_wakeup(dev) && !dev->power.wakeup_path) {
> +       if (!device_may_wakeup(dev) && !device_wakeup_path(dev)) {
>                 ret = pm_runtime_force_resume(dev);
>                 if (ret < 0)
>                         return ret;
> diff --git a/include/linux/pm_wakeup.h b/include/linux/pm_wakeup.h
> index aa3da6611533..196a157456aa 100644
> --- a/include/linux/pm_wakeup.h
> +++ b/include/linux/pm_wakeup.h
> @@ -84,6 +84,11 @@ static inline bool device_may_wakeup(struct device *dev)
>         return dev->power.can_wakeup && !!dev->power.wakeup;
>  }
>
> +static inline bool device_wakeup_path(struct device *dev)
> +{
> +       return dev->power.wakeup_path;
> +}
> +
>  static inline void device_set_wakeup_path(struct device *dev)
>  {
>         dev->power.wakeup_path = true;
> @@ -174,6 +179,11 @@ static inline bool device_may_wakeup(struct device *dev)
>         return dev->power.can_wakeup && dev->power.should_wakeup;
>  }
>
> +static inline bool device_wakeup_path(struct device *dev)
> +{
> +       return false;
> +}
> +
>  static inline void device_set_wakeup_path(struct device *dev) {}
>
>  static inline void __pm_stay_awake(struct wakeup_source *ws) {}
> --

Applied as 5.11 material, thanks!