Re: [PATCH 1/2] media: c3-mipi-adap: handle runtime resume failure

[Keke Li]

Hi Jiale,

Thanks for your patch.

On 10/3/26 16:11, Jiale Yao wrote:
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> c3_mipi_adap_enable_streams() ignores runtime resume failures and
> continues programming adapter registers before reporting that streaming
> started. If the power domain could not be resumed, those register
> accesses are unsafe and the disable path later drops a reference that
> was not acquired.
>
> Return the runtime PM error before accessing the adapter.
>
> Fixes: f0d2d8062cc8 ("media: platform: Add C3 MIPI adapter driver")
> Signed-off-by: Jiale Yao <yaojiale02@xxxxxxx>
> ---
>   drivers/media/platform/amlogic/c3/mipi-adapter/c3-mipi-adap.c | 4 +++-
>   1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/media/platform/amlogic/c3/mipi-adapter/c3-mipi-adap.c b/drivers/media/platform/amlogic/c3/mipi-adapter/c3-mipi-adap.c
> index 4bd98fb9c7e9..750b301f4bbf 100644
> --- a/drivers/media/platform/amlogic/c3/mipi-adapter/c3-mipi-adap.c
> +++ b/drivers/media/platform/amlogic/c3/mipi-adapter/c3-mipi-adap.c
> @@ -455,7 +455,9 @@ static int c3_mipi_adap_enable_streams(struct v4l2_subdev *sd,
>
>          src_sd = media_entity_to_v4l2_subdev(adap->src_pad->entity);
>
> -       pm_runtime_resume_and_get(adap->dev);
> +       ret = pm_runtime_resume_and_get(adap->dev);
> +       if (ret < 0)

                    Is   ' if (ret)'  better?

      Thanks!

> +               return ret;
>
>          fmt = v4l2_subdev_state_get_format(state, C3_MIPI_ADAP_PAD_SINK);
>
> --
> 2.34.1