[PATCH] drm:pl111: Add of_node_put() when breaking out of for_each_available_child_of_node()

[Daniel Vetter]

On Mon, Jul 11, 2022 at 09:15:50PM +0800, Liang He wrote:
> The reference 'child' in the iteration of for_each_available_child_of_node()
> is only escaped out into a local variable which is only used to check
> its value. So we still need to the of_node_put() when breaking of the
> for_each_available_child_of_node() which will automatically increase
> and decrease the refcount.
> 
> Fixes: ca454bd42dc2 ("drm/pl111: Support the Versatile Express")
> Signed-off-by: Liang He <windhl at 126.com>
> ---
> 
> As 'Check-after-Put' has been widely accepted in kernel source, we just
> use it. If the maintainer thinks it is harmful, I'd like also to use
> 'Check-and-Put' coding style but with a bit more work.
> 
>  drivers/gpu/drm/pl111/pl111_versatile.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/gpu/drm/pl111/pl111_versatile.c b/drivers/gpu/drm/pl111/pl111_versatile.c
> index bdd883f4f0da..963a5d5e6987 100644
> --- a/drivers/gpu/drm/pl111/pl111_versatile.c
> +++ b/drivers/gpu/drm/pl111/pl111_versatile.c
> @@ -402,6 +402,7 @@ static int pl111_vexpress_clcd_init(struct device *dev, struct device_node *np,
>  		if (of_device_is_compatible(child, "arm,pl111")) {
>  			has_coretile_clcd = true;
>  			ct_clcd = child;
> +			of_node_put(child);

The same issue seems to exist right below in the next break? Can you pls
respin with that included?

Thanks, Daniel

>  			break;
>  		}
>  		if (of_device_is_compatible(child, "arm,hdlcd")) {
> -- 
> 2.25.1
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch