[PATCH] media: rp1-cfe: Use IS_ERR() check for media_entity_remote_source_pad_unique()

[Jai Luthra]

Hi Ingyu,

Quoting Ingyu Jang (2026-05-15 01:01:48)
> media_entity_remote_source_pad_unique() returns either a valid struct
> media_pad pointer or an error pointer (ERR_PTR(-ENOTUNIQ) or
> ERR_PTR(-ENOLINK)); it never returns NULL. The current NULL check
> therefore never triggers, and the "pad not connected" error path is
> unreachable.
> 
> Replace the NULL check with an IS_ERR() check so the validation
> actually detects malformed media graphs.
> 
> Signed-off-by: Ingyu Jang <ingyujang25 at korea.ac.kr>

Needs fixes and Cc to stable,

Fixes: 6edb685abb2a ("media: raspberrypi: Add support for RP1-CFE")
Cc: stable at vger.kernel.org 

With that,

Reviewed-by: Jai Luthra <jai.luthra at ideasonboard.com>

Thanks,
    Jai

> ---
>  drivers/media/platform/raspberrypi/rp1-cfe/cfe.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/media/platform/raspberrypi/rp1-cfe/cfe.c b/drivers/media/platform/raspberrypi/rp1-cfe/cfe.c
> index 8375ed3e97b9f..91e9fa0341e06 100644
> --- a/drivers/media/platform/raspberrypi/rp1-cfe/cfe.c
> +++ b/drivers/media/platform/raspberrypi/rp1-cfe/cfe.c
> @@ -1779,7 +1779,7 @@ static int cfe_video_link_validate(struct media_link *link)
>                 link->source->entity->name, link->source->index,
>                 link->sink->entity->name, link->sink->index);
>  
> -       if (!media_entity_remote_source_pad_unique(link->sink->entity)) {
> +       if (IS_ERR(media_entity_remote_source_pad_unique(link->sink->entity))) {
>                 cfe_err(cfe, "video node %s pad not connected\n", vd->name);
>                 return -ENOTCONN;
>         }
> -- 
> 2.34.1
> 
>