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drm/edid: make drm_edid_duplicate() safe to call with NULL parameter 

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@intel.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1ae8923d39a5abd0260fdf7f9cc54c5e046e70d3.1685437501.git.jani.nikula@intel.com
This commit is contained in:
Jani Nikula 2023-05-30 12:08:23 +03:00
parent a036aa1f01
commit d60d2bccae
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/drm_edid.c
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@ -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);