[PATCH 1/2] drm/mediatek: Fix child node refcount handling in early exit

[CK Hu (胡俊光)]

Hi, Javier:

On Fri, 2024-10-11 at 21:21 +0200, Javier Carrasco wrote:
>  	 
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>  Early exits (goto, break, return) from for_each_child_of_node() required
> an explicit call to of_node_put(), which was not introduced with the
> break if cnt == MAX_CRTC.
> 
> Add the missing of_node_put() before the break.

Reviewed-by: CK Hu <ck.hu at mediatek.com>

> 
> Cc: stable at vger.kernel.org
> Fixes: d761b9450e31 ("drm/mediatek: Add cnt checking for coverity issue")
> 
> Signed-off-by: Javier Carrasco <javier.carrasco.cruz at gmail.com>
> ---
>  drivers/gpu/drm/mediatek/mtk_drm_drv.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> index a4594f8873d5..0878df832859 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> @@ -406,8 +406,10 @@ static bool mtk_drm_get_all_drm_priv(struct device *dev)
>  if (temp_drm_priv->mtk_drm_bound)
>  cnt++;
>  
> -if (cnt == MAX_CRTC)
> +if (cnt == MAX_CRTC) {
> +of_node_put(node);
>  break;
> +}
>  }
>  
>  if (drm_priv->data->mmsys_dev_num == cnt) {
> 
> -- 
> 2.43.0
>