linux-kernel - Re: [PATCH] rpmsg: core: Drop dev_pm_domain

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Message-ID: <aLHW7yBvEsAlYQoK@p14s>
Date: Fri, 29 Aug 2025 10:35:59 -0600
From: Mathieu Poirier <mathieu.poirier@...aro.org>
To: Claudiu <claudiu.beznea@...on.dev>
Cc: andersson@...nel.org, ulf.hansson@...aro.org, rafael@...nel.org,
	linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org,
	Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
Subject: Re: [PATCH] rpmsg: core: Drop dev_pm_domain_detach() call

On Wed, Aug 27, 2025 at 01:13:52PM +0300, Claudiu wrote:
> From: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
> 
> Starting with commit f99508074e78 ("PM: domains: Detach on
> device_unbind_cleanup()"), there is no longer a need to call
> dev_pm_domain_detach() in the bus remove function. The
> device_unbind_cleanup() function now handles this to avoid
> invoking devres cleanup handlers while the PM domain is
> powered off, which could otherwise lead to failures as
> described in the above-mentioned commit.
> 
> Drop the explicit dev_pm_domain_detach() call and rely instead
> on the flags passed to dev_pm_domain_attach() to power off the
> domain.
> 
> Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
> ---
>  drivers/rpmsg/rpmsg_core.c | 5 ++---
>  1 file changed, 2 insertions(+), 3 deletions(-)
>

Applied.

Thanks,
Mathieu
 
> diff --git a/drivers/rpmsg/rpmsg_core.c b/drivers/rpmsg/rpmsg_core.c
> index bece5e635ee9..5d661681a9b6 100644
> --- a/drivers/rpmsg/rpmsg_core.c
> +++ b/drivers/rpmsg/rpmsg_core.c
> @@ -479,7 +479,8 @@ static int rpmsg_dev_probe(struct device *dev)
>  	struct rpmsg_endpoint *ept = NULL;
>  	int err;
>  
> -	err = dev_pm_domain_attach(dev, PD_FLAG_ATTACH_POWER_ON);
> +	err = dev_pm_domain_attach(dev, PD_FLAG_ATTACH_POWER_ON |
> +					PD_FLAG_DETACH_POWER_OFF);
>  	if (err)
>  		goto out;
>  
> @@ -538,8 +539,6 @@ static void rpmsg_dev_remove(struct device *dev)
>  	if (rpdrv->remove)
>  		rpdrv->remove(rpdev);
>  
> -	dev_pm_domain_detach(dev, true);
> -
>  	if (rpdev->ept)
>  		rpmsg_destroy_ept(rpdev->ept);
>  }
> -- 
> 2.43.0
>