drm/mediatek: Fix child node refcount handling in early exit

commit f708e8b upstream.

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.

Cc: [email protected]
Fixes: d761b94 ("drm/mediatek: Add cnt checking for coverity issue")

Signed-off-by: Javier Carrasco <[email protected]>
Reviewed-by: CK Hu <[email protected]>
Reviewed-by: Chen-Yu Tsai <[email protected]>
Reviewed-by: AngeloGioacchino Del Regno <[email protected]>
Link: https://patchwork.kernel.org/project/dri-devel/patch/[email protected]/
Signed-off-by: Chun-Kuang Hu <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: javiercarrascocruz

drivers/gpu/drm/mediatek/mtk_drm_drv.c

@@ -378,8 +378,10 @@ static bool mtk_drm_get_all_drm_priv(struct device *dev)
 		if (all_drm_priv[cnt] && all_drm_priv[cnt]->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) {