linux-kernel - Re: [PATCH 8/8] media: rzg2l-cru: rzg2l-core: Use devm_pm_runtime

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Message-ID: <20250214005059.GG8393@pendragon.ideasonboard.com>
Date: Fri, 14 Feb 2025 02:50:59 +0200
From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
To: Tommaso Merciai <tomm.merciai@...il.com>
Cc: linux-renesas-soc@...r.kernel.org, linux-media@...r.kernel.org,
	biju.das.jz@...renesas.com, prabhakar.mahadev-lad.rj@...renesas.com,
	Tommaso Merciai <tommaso.merciai.xr@...renesas.com>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Magnus Damm <magnus.damm@...il.com>,
	Hans Verkuil <hverkuil@...all.nl>,
	Uwe Kleine-König <u.kleine-koenig@...libre.com>,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 8/8] media: rzg2l-cru: rzg2l-core: Use
 devm_pm_runtime_enable()

Hi Tommaso,

Thank you for the patch.

On Mon, Feb 10, 2025 at 12:45:40PM +0100, Tommaso Merciai wrote:
> Use newly added devm_pm_runtime_enable() into rzg2l_cru_probe() and
> drop unnecessary pm_runtime_disable() from rzg2l_cru_probe() and
> rzg2l_csi2_remove().
> 
> Signed-off-by: Tommaso Merciai <tommaso.merciai.xr@...renesas.com>
> ---
>  drivers/media/platform/renesas/rzg2l-cru/rzg2l-core.c | 7 +++----
>  1 file changed, 3 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-core.c b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-core.c
> index 70fed0ce45ea..5548b328d970 100644
> --- a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-core.c
> +++ b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-core.c
> @@ -287,7 +287,9 @@ static int rzg2l_cru_probe(struct platform_device *pdev)
>  
>  	cru->num_buf = RZG2L_CRU_HW_BUFFER_DEFAULT;
>  	pm_suspend_ignore_children(dev, true);
> -	pm_runtime_enable(dev);
> +	ret = devm_pm_runtime_enable(dev);
> +	if (ret)
> +		return ret;

Leaking DMA.

>  
>  	ret = rzg2l_cru_media_init(cru);
>  	if (ret)
> @@ -297,7 +299,6 @@ static int rzg2l_cru_probe(struct platform_device *pdev)
>  
>  error_dma_unregister:
>  	rzg2l_cru_dma_unregister(cru);
> -	pm_runtime_disable(dev);
>  
>  	return ret;
>  }
> @@ -306,8 +307,6 @@ static void rzg2l_cru_remove(struct platform_device *pdev)
>  {
>  	struct rzg2l_cru_dev *cru = platform_get_drvdata(pdev);
>  
> -	pm_runtime_disable(&pdev->dev);
> -
>  	v4l2_async_nf_unregister(&cru->notifier);
>  	v4l2_async_nf_cleanup(&cru->notifier);
>  

-- 
Regards,

Laurent Pinchart