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[media] media-entity: only call dev_dbg_obj if mdev is not NULL 

Fix kernel Oops NULL pointer deference
Call dev_dbg_obj only after checking if gobj->mdev is not NULL

Signed-off-by: Helen Koike <helen.koike@collabora.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Helen Fornazier 2017-04-06 16:25:15 -03:00 committed by Mauro Carvalho Chehab
parent 242b0c4cc9
commit 8d1d3d004c
1 changed files with 2 additions and 2 deletions
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4
drivers/media/media-entity.c
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@ -199,12 +199,12 @@ void media_gobj_create(struct media_device *mdev,
void media_gobj_destroy(struct media_gobj *gobj)
{
dev_dbg_obj(__func__, gobj);
/* Do nothing if the object is not linked. */
if (gobj->mdev == NULL)
return;
dev_dbg_obj(__func__, gobj);
gobj->mdev->topology_version++;
/* Remove the object from mdev list */