linux-kernel - Re: [PATCH v4 43/79] media: i2c: ov2659: use pm_runtime_resume_and

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Date:   Mon, 3 May 2021 13:30:02 +0100
From:   "Lad, Prabhakar" <prabhakar.csengg@...il.com>
To:     Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
Cc:     linuxarm@...wei.com, mauro.chehab@...wei.com,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-media <linux-media@...r.kernel.org>
Subject: Re: [PATCH v4 43/79] media: i2c: ov2659: use pm_runtime_resume_and_get()

Hi Mauro,

Thank you for the patch.

On Wed, Apr 28, 2021 at 3:52 PM Mauro Carvalho Chehab
<mchehab+huawei@...nel.org> 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>
> ---
>  drivers/media/i2c/ov2659.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
>
Acked-by: Lad Prabhakar <prabhakar.csengg@...il.com>

Cheers,
Prabhakar

> diff --git a/drivers/media/i2c/ov2659.c b/drivers/media/i2c/ov2659.c
> index 42f64175a6df..a3c8eae68486 100644
> --- a/drivers/media/i2c/ov2659.c
> +++ b/drivers/media/i2c/ov2659.c
> @@ -1186,11 +1186,9 @@ static int ov2659_s_stream(struct v4l2_subdev *sd, int on)
>                 goto unlock;
>         }
>
> -       ret = pm_runtime_get_sync(&client->dev);
> -       if (ret < 0) {
> -               pm_runtime_put_noidle(&client->dev);
> +       ret = pm_runtime_resume_and_get(&client->dev);
> +       if (ret < 0)
>                 goto unlock;
> -       }
>
>         ret = ov2659_init(sd, 0);
>         if (!ret)
> --
> 2.30.2
>