[PATCH v3 25/26] drm/bridge: require the owner .odev to be filled in on drm_bridge_add/attach

Peter Rosin
2018-05-16T10:18:02Z

The .odev owner device will be handy to have around.

Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Peter Rosin <peda@axentia.se>
---
drivers/gpu/drm/drm_bridge.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c
index df084db33494..78d186b6831b 100644
--- a/drivers/gpu/drm/drm_bridge.c
+++ b/drivers/gpu/drm/drm_bridge.c
@@ -70,6 +70,9 @@ static LIST_HEAD(bridge_list);
*/
void drm_bridge_add(struct drm_bridge *bridge)
{
+ if (WARN_ON(!bridge->odev))
+ return;
+
mutex_lock(&bridge_lock);
list_add_tail(&bridge->list, &bridge_list);
mutex_unlock(&bridge_lock);
@@ -115,6 +118,9 @@ int drm_bridge_attach(struct drm_encoder *encoder, struct drm_bridge *bridge,
if (!encoder || !bridge)
return -EINVAL;

+ if (WARN_ON(!bridge->odev))
+ return -EINVAL;
+
if (previous && (!previous->dev || previous->encoder != encoder))
return -EINVAL;

--
2.11.0