Re: [PATCH v2] drm: rcar-du: Fix memory leak in rcar_du_vsps_init()

[Laurent Pinchart <laurent.pinchart@ideasonboard.com>]

Hi Biju,

Thank you for the patch.

On Thu, Nov 16, 2023 at 12:24:24PM +0000, Biju Das wrote:
> The rcar_du_vsps_init() doesn't free the np allocated by
> of_parse_phandle_with_fixed_args() for the non-error case.
> 
> Fix memory leak for the non-error case.
> 
> While at it, replace the label 'error'->'done' as it applies to non-error
> case as well and update the error check condition for rcar_du_vsp_init()
> to avoid breakage in future, if it returns positive value.
> 
> Fixes: 3e81374e2014 ("drm: rcar-du: Support multiple sources from the same VSP")
> Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>

Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

> ---
> v1->v2:
>  * Replaced the label 'error'->'done' as it applies to non-error case as
>    well.
>  * Update the error check condition for rcar_du_vsp_init() to avoid
>    breakage in future, if it returns positive value.
> ---
>  drivers/gpu/drm/renesas/rcar-du/rcar_du_kms.c | 10 ++++------
>  1 file changed, 4 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/gpu/drm/renesas/rcar-du/rcar_du_kms.c b/drivers/gpu/drm/renesas/rcar-du/rcar_du_kms.c
> index 70d8ad065bfa..4c8fe83dd610 100644
> --- a/drivers/gpu/drm/renesas/rcar-du/rcar_du_kms.c
> +++ b/drivers/gpu/drm/renesas/rcar-du/rcar_du_kms.c
> @@ -705,7 +705,7 @@ static int rcar_du_vsps_init(struct rcar_du_device *rcdu)
>  		ret = of_parse_phandle_with_fixed_args(np, vsps_prop_name,
>  						       cells, i, &args);
>  		if (ret < 0)
> -			goto error;
> +			goto done;
>  
>  		/*
>  		 * Add the VSP to the list or update the corresponding existing
> @@ -743,13 +743,11 @@ static int rcar_du_vsps_init(struct rcar_du_device *rcdu)
>  		vsp->dev = rcdu;
>  
>  		ret = rcar_du_vsp_init(vsp, vsps[i].np, vsps[i].crtcs_mask);
> -		if (ret < 0)
> -			goto error;
> +		if (ret)
> +			goto done;
>  	}
>  
> -	return 0;
> -
> -error:
> +done:
>  	for (i = 0; i < ARRAY_SIZE(vsps); ++i)
>  		of_node_put(vsps[i].np);
>  

-- 
Regards,

Laurent Pinchart