linux-kernel - Re: [PATCH v5 05/16] media: mtk-jpeg: Use pm_runtime_resume_and_get for PM get

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Message-ID: <82aea4aa-0007-369d-9c0d-db0077471b80@gmail.com>
Date:   Wed, 9 Jun 2021 15:38:13 +0200
From:   Matthias Brugger <matthias.bgg@...il.com>
To:     Yong Wu <yong.wu@...iatek.com>, Joerg Roedel <joro@...tes.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk@...nel.org>
Cc:     Evan Green <evgreen@...omium.org>,
        Robin Murphy <robin.murphy@....com>,
        Tomasz Figa <tfiga@...omium.org>,
        Will Deacon <will.deacon@....com>,
        linux-mediatek@...ts.infradead.org, srv_heupstream@...iatek.com,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        iommu@...ts.linux-foundation.org, youlin.pei@...iatek.com,
        Nicolas Boichat <drinkcat@...omium.org>,
        Matthias Kaehlcke <mka@...omium.org>, anan.sun@...iatek.com,
        chao.hao@...iatek.com, ming-fan.chen@...iatek.com,
        yi.kuo@...iatek.com, eizan@...omium.org, acourbot@...omium.org,
        Xia Jiang <xia.jiang@...iatek.com>
Subject: Re: [PATCH v5 05/16] media: mtk-jpeg: Use pm_runtime_resume_and_get
 for PM get_sync



On 10/04/2021 11:11, Yong Wu wrote:
> pm_runtime_get_sync will increment pm usage counter even it failed.
> This patch use pm_runtime_resume_and_get instead of pm_runtime_get
> to keep usage counter balanced.
> 
> CC: Xia Jiang <xia.jiang@...iatek.com>
> Signed-off-by: Yong Wu <yong.wu@...iatek.com>

Reviewed-by: Matthias Brugger <matthias.bgg@...il.com>

> ---
>  drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c b/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c
> index 88a23bce569d..a89c7b206eef 100644
> --- a/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c
> +++ b/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c
> @@ -920,7 +920,7 @@ static void mtk_jpeg_enc_device_run(void *priv)
>  	src_buf = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
>  	dst_buf = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
>  
> -	ret = pm_runtime_get_sync(jpeg->dev);
> +	ret = pm_runtime_resume_and_get(jpeg->dev);
>  	if (ret < 0)
>  		goto enc_end;
>  
> @@ -973,7 +973,7 @@ static void mtk_jpeg_dec_device_run(void *priv)
>  		return;
>  	}
>  
> -	ret = pm_runtime_get_sync(jpeg->dev);
> +	ret = pm_runtime_resume_and_get(jpeg->dev);
>  	if (ret < 0)
>  		goto dec_end;
>  
>