[PATCH 1/7] media: mc: Check pad flag validity

Sakari Ailus
2023-06-30T20:43:51Z

Check the validity of pad flags on entity init. Exactly one of the flags
must be set.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
---
drivers/media/mc/mc-entity.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/media/mc/mc-entity.c b/drivers/media/mc/mc-entity.c
index 83468d4a440b..4991281dcccc 100644
--- a/drivers/media/mc/mc-entity.c
+++ b/drivers/media/mc/mc-entity.c
@@ -197,6 +197,7 @@ int media_entity_pads_init(struct media_entity *entity, u16 num_pads,
struct media_device *mdev = entity->graph_obj.mdev;
struct media_pad *iter;
unsigned int i = 0;
+ int ret = 0;

if (num_pads >= MEDIA_ENTITY_MAX_PADS)
return -E2BIG;
@@ -210,6 +211,14 @@ int media_entity_pads_init(struct media_entity *entity, u16 num_pads,
media_entity_for_each_pad(entity, iter) {
iter->entity = entity;
iter->index = i++;
+
+ if (hweight32(iter->flags & (MEDIA_PAD_FL_SINK |
+ MEDIA_PAD_FL_SOURCE))
+ != 1) {
+ ret = -EINVAL;
+ break;
+ }
+
if (mdev)
media_gobj_create(mdev, MEDIA_GRAPH_PAD,
&iter->graph_obj);
@@ -218,7 +227,7 @@ int media_entity_pads_init(struct media_entity *entity, u16 num_pads,
if (mdev)
mutex_unlock(&mdev->graph_mutex);

- return 0;
+ return ret;
}
EXPORT_SYMBOL_GPL(media_entity_pads_init);

--
2.39.2