[Intel-gfx] [PATCH v2 11/13] drm/edid: make drm_edid_duplicate() safe to call with NULL parameter

[Jani Nikula]

It's a bit tedious to check for NULL before calling
drm_edid_duplicate(). Make it handle NULL parameter graciously.

Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal at intel.com>
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);
-- 
2.39.2