[PATCH v9 2/5] drm/bridge: get the bridge returned by drm_bridge_chain_get_first_bridge()

[Luca Ceresoli]

drm_bridge_chain_get_first_bridge() returns a bridge pointer that the
caller could hold for a long time. Increment the refcount of the returned
bridge and document it must be put by the caller.

Reviewed-by: Maxime Ripard <mripard at kernel.org>
Signed-off-by: Luca Ceresoli <luca.ceresoli at bootlin.com>
---

This patch was added in v7.
---
 include/drm/drm_bridge.h | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h
index 88e7a41c39eb1163bd455003e9ca40468932d97a..53508d2e7acf45dea8eab71e2ce6dbcdd6739de5 100644
--- a/include/drm/drm_bridge.h
+++ b/include/drm/drm_bridge.h
@@ -1336,6 +1336,9 @@ drm_bridge_get_prev_bridge(struct drm_bridge *bridge)
  * drm_bridge_chain_get_first_bridge() - Get the first bridge in the chain
  * @encoder: encoder object
  *
+ * The refcount of the returned bridge is incremented. Use drm_bridge_put()
+ * when done with it.
+ *
  * RETURNS:
  * the first bridge in the chain, or NULL if @encoder has no bridge attached
  * to it.
@@ -1343,8 +1346,8 @@ drm_bridge_get_prev_bridge(struct drm_bridge *bridge)
 static inline struct drm_bridge *
 drm_bridge_chain_get_first_bridge(struct drm_encoder *encoder)
 {
-	return list_first_entry_or_null(&encoder->bridge_chain,
-					struct drm_bridge, chain_node);
+	return drm_bridge_get(list_first_entry_or_null(&encoder->bridge_chain,
+						       struct drm_bridge, chain_node));
 }
 
 /**

-- 
2.50.0