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drm/bridge: get the bridge returned by drm_bridge_get_next_bridge() 

drm_bridge_get_next_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@kernel.org>
Link: https://lore.kernel.org/r/20250801-drm-bridge-alloc-getput-drm_bridge_get_next_bridge-v2-7-888912b0be13@bootlin.com
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
pull/1354/merge
Luca Ceresoli 2025-08-01 19:05:29 +02:00
parent 8e1e17416c
commit 61aa4f7a60
1 changed files with 8 additions and 1 deletions
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9
include/drm/drm_bridge.h
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@ -1362,6 +1362,13 @@ drm_bridge_get_current_state(struct drm_bridge *bridge)
* drm_bridge_get_next_bridge() - Get the next bridge in the chain
* @bridge: bridge object
*
* The caller is responsible of having a reference to @bridge via
* drm_bridge_get() or equivalent. This function leaves the refcount of
* @bridge unmodified.
*
* The refcount of the returned bridge is incremented. Use drm_bridge_put()
* when done with it.
*
* RETURNS:
* the next bridge in the chain after @bridge, or NULL if @bridge is the last.
*/
@ -1371,7 +1378,7 @@ drm_bridge_get_next_bridge(struct drm_bridge *bridge)
if (list_is_last(&bridge->chain_node, &bridge->encoder->bridge_chain))
return NULL;
return list_next_entry(bridge, chain_node);
return drm_bridge_get(list_next_entry(bridge, chain_node));
}
/**