linux-kernel - Re: [PATCH v2 07/18] media: rzg2l-cru: rzg2l-core: Use devm_pm_runtime

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Message-ID: <CA+V-a8u3CRvy6i+zCXhb1unOdgY13PbttNOTyGJ-g44Nk5MLpQ@mail.gmail.com>
Date: Sun, 23 Feb 2025 21:14:38 +0000
From: "Lad, Prabhakar" <prabhakar.csengg@...il.com>
To: Tommaso Merciai <tommaso.merciai.xr@...renesas.com>
Cc: tomm.merciai@...il.com, linux-renesas-soc@...r.kernel.org, 
	linux-media@...r.kernel.org, biju.das.jz@...renesas.com, 
	prabhakar.mahadev-lad.rj@...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>, 
	Laurent Pinchart <laurent.pinchart+renesas@...asonboard.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 v2 07/18] media: rzg2l-cru: rzg2l-core: Use devm_pm_runtime_enable()

On Fri, Feb 21, 2025 at 4:06 PM Tommaso Merciai
<tommaso.merciai.xr@...renesas.com> 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().
>
> Reviewed-by: Biju Das <biju.das.jz@...renesas.com>
> Signed-off-by: Tommaso Merciai <tommaso.merciai.xr@...renesas.com>
> ---
> Changes since v1:
>  - Fixed DMA leak as suggested by LPinchart
>  - Collected tags
>
>  drivers/media/platform/renesas/rzg2l-cru/rzg2l-core.c | 7 +++----
>  1 file changed, 3 insertions(+), 4 deletions(-)
>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>

Cheers,
Prabhakar

> diff --git a/drivers/media/platform/renesas/rzg2l-cru/rzg2l-core.c b/drivers/media/platform/renesas/rzg2l-cru/rzg2l-core.c
> index 70fed0ce45ea..eed9d2bd0841 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)
> +               goto error_dma_unregister;
>
>         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);
>
> --
> 2.34.1
>
>