Re: [PATCH v2 1/2] PM / Domains: Remove redundant pm_runtime_get|put*() in pm_genpd_prepare()

[Laurent Pinchart <laurent.pinchart@ideasonboard.com>]

Hi Ulrich,

Thank you for the patch.

On Tuesday 26 Apr 2016 08:47:17 Ulf Hansson wrote:
> The PM core increases and decreases the runtime PM usage count in the
> system PM prepare phase. This makes some of the pm_runtime_get|put*()
> calls in pm_gendp_prepare() redundant, so let's remove them.
> 
> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
> Reviewed-by: Kevin Hilman <khilman@baylibre.com>

Apart from the gendp typo,

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> ---
> 
> Changes in v2:
> 	Updated changlog and added Kevin's reviewed by.
> 
> ---
>  drivers/base/power/domain.c | 10 ++--------
>  1 file changed, 2 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
> index 4ce4ce0..60a3573 100644
> --- a/drivers/base/power/domain.c
> +++ b/drivers/base/power/domain.c
> @@ -730,14 +730,11 @@ static int pm_genpd_prepare(struct device *dev)
>  	 * at this point and a system wakeup event should be reported if it's
>  	 * set up to wake up the system from sleep states.
>  	 */
> -	pm_runtime_get_noresume(dev);
>  	if (pm_runtime_barrier(dev) && device_may_wakeup(dev))
>  		pm_wakeup_event(dev, 0);
> 
> -	if (pm_wakeup_pending()) {
> -		pm_runtime_put(dev);
> +	if (pm_wakeup_pending())
>  		return -EBUSY;
> -	}
> 
>  	if (resume_needed(dev, genpd))
>  		pm_runtime_resume(dev);
> @@ -751,10 +748,8 @@ static int pm_genpd_prepare(struct device *dev)
> 
>  	mutex_unlock(&genpd->lock);
> 
> -	if (genpd->suspend_power_off) {
> -		pm_runtime_put_noidle(dev);
> +	if (genpd->suspend_power_off)
>  		return 0;
> -	}
> 
>  	/*
>  	 * The PM domain must be in the GPD_STATE_ACTIVE state at this point,
> @@ -776,7 +771,6 @@ static int pm_genpd_prepare(struct device *dev)
>  		pm_runtime_enable(dev);
>  	}
> 
> -	pm_runtime_put(dev);
>  	return ret;
>  }

-- 
Regards,

Laurent Pinchart