linux-kernel - Re: [PATCH v4 57/79] media: rockchip/rga: use pm_runtime_resume_and

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Message-ID: <2615f6be602573869e979d4d763155a86332c845.camel@collabora.com>
Date:   Wed, 28 Apr 2021 14:11:44 -0300
From:   Ezequiel Garcia <ezequiel@...labora.com>
To:     Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
Cc:     linuxarm@...wei.com, mauro.chehab@...wei.com,
        Heiko Stuebner <heiko@...ech.de>,
        Jacob Chen <jacob-chen@...wrt.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-media@...r.kernel.org, linux-rockchip@...ts.infradead.org
Subject: Re: [PATCH v4 57/79] media: rockchip/rga: use
 pm_runtime_resume_and_get()

On Wed, 2021-04-28 at 16:52 +0200, Mauro Carvalho Chehab wrote:
> Commit dd8088d5a896 ("PM: runtime: Add pm_runtime_resume_and_get to deal with usage counter")
> added pm_runtime_resume_and_get() in order to automatically handle
> dev->power.usage_count decrement on errors.
> 
> Use the new API, in order to cleanup the error check logic.
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>

Ugh, sigh... OK, there was a v4. Sorry for the noise!

Reviewed-by: Ezequiel Garcia <ezequiel@...labora.com>

> ---
>  drivers/media/platform/rockchip/rga/rga-buf.c | 3 +--
>  drivers/media/platform/rockchip/rga/rga.c     | 4 +++-
>  2 files changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/media/platform/rockchip/rga/rga-buf.c b/drivers/media/platform/rockchip/rga/rga-buf.c
> index bf9a75b75083..81508ed5abf3 100644
> --- a/drivers/media/platform/rockchip/rga/rga-buf.c
> +++ b/drivers/media/platform/rockchip/rga/rga-buf.c
> @@ -79,9 +79,8 @@ static int rga_buf_start_streaming(struct vb2_queue *q, unsigned int count)
>         struct rockchip_rga *rga = ctx->rga;
>         int ret;
>  
> -       ret = pm_runtime_get_sync(rga->dev);
> +       ret = pm_runtime_resume_and_get(rga->dev);
>         if (ret < 0) {
> -               pm_runtime_put_noidle(rga->dev);
>                 rga_buf_return_buffers(q, VB2_BUF_STATE_QUEUED);
>                 return ret;
>         }
> diff --git a/drivers/media/platform/rockchip/rga/rga.c b/drivers/media/platform/rockchip/rga/rga.c
> index 9d122429706e..bf3fd71ec3af 100644
> --- a/drivers/media/platform/rockchip/rga/rga.c
> +++ b/drivers/media/platform/rockchip/rga/rga.c
> @@ -866,7 +866,9 @@ static int rga_probe(struct platform_device *pdev)
>                 goto unreg_video_dev;
>         }
>  
> -       pm_runtime_get_sync(rga->dev);
> +       ret = pm_runtime_resume_and_get(rga->dev);
> +       if (ret < 0)
> +               goto unreg_video_dev;
>  
>         rga->version.major = (rga_read(rga, RGA_VERSION_INFO) >> 24) & 0xFF;
>         rga->version.minor = (rga_read(rga, RGA_VERSION_INFO) >> 20) & 0x0F;