[Intel-gfx] [PATCH 11/13] drm/edid: make drm_edid_duplicate() safe to call with NULL parameter

[Nautiyal, Ankit K]

LGTM.

Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal at intel.com>

On 4/21/2023 5:17 PM, Jani Nikula wrote:
> It's a bit tedious to check for NULL before calling
> drm_edid_duplicate(). Make it handle NULL parameter graciously.
>
> Signed-off-by: Jani Nikula <jani.nikula at intel.com>
> ---
>   drivers/gpu/drm/drm_edid.c | 3 +++
>   1 file changed, 3 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
> index 941f3d53a701..e0dbd9140726 100644
> --- a/drivers/gpu/drm/drm_edid.c
> +++ b/drivers/gpu/drm/drm_edid.c
> @@ -2881,6 +2881,9 @@ EXPORT_SYMBOL(drm_edid_read_switcheroo);
>    */
>   struct edid *drm_edid_duplicate(const struct edid *edid)
>   {
> +	if (!edid)
> +		return NULL;
> +
>   	return kmemdup(edid, edid_size(edid), GFP_KERNEL);
>   }
>   EXPORT_SYMBOL(drm_edid_duplicate);